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window.loswp.previewableAttachments = [{"id":111041030,"identifier":"Attachment_111041030","shouldShowBulkDownload":false}]; window.loswp.shouldDetectTimezone = true; window.loswp.shouldShowBulkDownload = true; window.loswp.showSignupCaptcha = false window.loswp.willEdgeCache = false; window.loswp.work = {"work":{"id":114308751,"created_at":"2024-01-31T10:00:36.888-08:00","from_world_paper_id":249140078,"updated_at":"2024-11-29T04:07:36.233-08:00","_data":{"publisher":"IEEE","ai_title_tag":"OLED Degradation Analysis under Thermal and Electrical Stress","grobid_abstract":"Organic light emitting diodes are one of the most innovative light sources. They do not require semiconductor fabrication techniques like the LED family, they are simple to construct and are used in many original applications. The inconvenient of this product is that it does not have a long lasting useful life with more then 10000 hours. Therefore, this paper will present a parametric method to design an aging model of the OLED based on luminance decay and electrical impedance evolution. Accelerated tests using thermal factor and current density will be applied to large warm white OLED panels. A log-normal model for the luminance decay will be merged with design of experiments method to include the stress factors as well as impedance characteristics resulting in an effective degradation model that can estimate the lifetime of the OLED.","publication_date":"2019,,","publication_name":"IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society","grobid_abstract_attachment_id":"111041030"},"document_type":"paper","pre_hit_view_count_baseline":null,"quality":"high","language":"en","title":"Degradation of the luminance and impedance evolution analysis of an OLED under thermal and electrical stress","broadcastable":true,"draft":null,"has_indexable_attachment":true,"indexable":true}}["work"]; window.loswp.workCoauthors = [37857668]; window.loswp.locale = "en"; window.loswp.countryCode = "SG"; window.loswp.cwvAbTestBucket = ""; window.loswp.designVariant = "ds_vanilla"; window.loswp.fullPageMobileSutdModalVariant = "full_page_mobile_sutd_modal"; window.loswp.useOptimizedScribd4genScript = false; window.loginModal = {}; window.loginModal.appleClientId = 'edu.academia.applesignon'; window.userInChina = "false";</script><script defer="" src="https://accounts.google.com/gsi/client"></script><div class="ds-loswp-container"><div class="ds-work-card--grid-container"><div class="ds-work-card--container js-loswp-work-card"><div class="ds-work-card--cover"><div class="ds-work-cover--wrapper"><div class="ds-work-cover--container"><button class="ds-work-cover--clickable js-swp-download-button" data-signup-modal="{"location":"swp-splash-paper-cover","attachmentId":111041030,"attachmentType":"pdf"}"><img alt="First page of “Degradation of the luminance and impedance evolution analysis of an OLED under thermal and electrical stress”" class="ds-work-cover--cover-thumbnail" src="https://0.academia-photos.com/attachment_thumbnails/111041030/mini_magick20240131-1-6krap9.png?1706724172" /><img alt="PDF Icon" class="ds-work-cover--file-icon" src="//a.academia-assets.com/images/single_work_splash/adobe_icon.svg" /><div class="ds-work-cover--hover-container"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span><p>Download Free PDF</p></div><div class="ds-work-cover--ribbon-container">Download Free PDF</div><div class="ds-work-cover--ribbon-triangle"></div></button></div></div></div><div class="ds-work-card--work-information"><h1 class="ds-work-card--work-title">Degradation of the luminance and impedance evolution analysis of an OLED under thermal and electrical stress</h1><div class="ds-work-card--work-authors ds-work-card--detail"><a class="ds-work-card--author js-wsj-grid-card-author ds2-5-body-md ds2-5-body-link" data-author-id="37857668" href="https://univ-tlse.academia.edu/GeorgesZissis"><img alt="Profile image of Georges Zissis" class="ds-work-card--author-avatar" src="https://0.academia-photos.com/37857668/51645996/39727801/s65_georges.zissis.jpeg" />Georges Zissis</a></div><div class="ds-work-card--detail"><p class="ds-work-card--detail ds2-5-body-sm">2019, IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society</p><div class="ds-work-card--work-metadata"><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">visibility</span><p class="ds2-5-body-sm" id="work-metadata-view-count">…</p></div><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">description</span><p class="ds2-5-body-sm">8 pages</p></div><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">link</span><p class="ds2-5-body-sm">1 file</p></div></div><script>(async () => { const workId = 114308751; const worksViewsPath = "/v0/works/views?subdomain_param=api&work_ids%5B%5D=114308751"; const getWorkViews = async (workId) => { const response = await fetch(worksViewsPath); if (!response.ok) { throw new Error('Failed to load work views'); } const data = await response.json(); return data.views[workId]; }; // Get the view count for the work - we send this immediately rather than waiting for // the DOM to load, so it can be available as soon as possible (but without holding up // the backend or other resource requests, because it's a bit expensive and not critical). const viewCount = await getWorkViews(workId); const updateViewCount = (viewCount) => { try { const viewCountNumber = parseInt(viewCount, 10); if (viewCountNumber === 0) { // Remove the whole views element if there are zero views. document.getElementById('work-metadata-view-count')?.parentNode?.remove(); return; } const commaizedViewCount = viewCountNumber.toLocaleString(); const viewCountBody = document.getElementById('work-metadata-view-count'); if (!viewCountBody) { throw new Error('Failed to find work views element'); } viewCountBody.textContent = `${commaizedViewCount} views`; } catch (error) { // Remove the whole views element if there was some issue parsing. document.getElementById('work-metadata-view-count')?.parentNode?.remove(); throw new Error(`Failed to parse view count: ${viewCount}`, error); } }; // If the DOM is still loading, wait for it to be ready before updating the view count. if (document.readyState === "loading") { document.addEventListener('DOMContentLoaded', () => { updateViewCount(viewCount); }); // Otherwise, just update it immediately. } else { updateViewCount(viewCount); } })();</script></div><p class="ds-work-card--work-abstract ds-work-card--detail ds2-5-body-md">Organic light emitting diodes are one of the most innovative light sources. They do not require semiconductor fabrication techniques like the LED family, they are simple to construct and are used in many original applications. The inconvenient of this product is that it does not have a long lasting useful life with more then 10000 hours. Therefore, this paper will present a parametric method to design an aging model of the OLED based on luminance decay and electrical impedance evolution. Accelerated tests using thermal factor and current density will be applied to large warm white OLED panels. A log-normal model for the luminance decay will be merged with design of experiments method to include the stress factors as well as impedance characteristics resulting in an effective degradation model that can estimate the lifetime of the OLED.</p><div class="ds-work-card--button-container"><button class="ds2-5-button js-swp-download-button" data-signup-modal="{"location":"continue-reading-button--work-card","attachmentId":111041030,"attachmentType":"pdf","workUrl":"https://www.academia.edu/114308751/Degradation_of_the_luminance_and_impedance_evolution_analysis_of_an_OLED_under_thermal_and_electrical_stress"}">See full PDF</button><button class="ds2-5-button ds2-5-button--secondary js-swp-download-button" data-signup-modal="{"location":"download-pdf-button--work-card","attachmentId":111041030,"attachmentType":"pdf","workUrl":"https://www.academia.edu/114308751/Degradation_of_the_luminance_and_impedance_evolution_analysis_of_an_OLED_under_thermal_and_electrical_stress"}"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span>Download PDF</button></div><div class="ds-signup-banner-trigger-container"><div class="ds-signup-banner-trigger ds-signup-banner-trigger-control"></div></div><div class="ds-signup-banner ds-signup-banner-control"><div id="ds-signup-banner-close-button"><button class="ds2-5-button ds2-5-button--secondary ds2-5-button--inverse"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">close</span></button></div><div class="ds-signup-banner-ctas" data-impression-entity-id="114308751" data-impression-entity-type="2" data-impression-source="signup-banner"><img src="//a.academia-assets.com/images/academia-logo-capital-white.svg" /><h4 class="ds2-5-heading-serif-sm">Sign up for access to the world's latest research</h4><button class="ds2-5-button ds2-5-button--inverse ds2-5-button--full-width js-swp-download-button" data-signup-modal="{"location":"signup-banner"}">Sign up for free<span class="material-symbols-outlined" style="font-size: 20px" translate="no">arrow_forward</span></button></div><div class="ds-signup-banner-divider"></div><div class="ds-signup-banner-reasons"><div class="ds-signup-banner-reasons-item"><span class="material-symbols-outlined" style="font-size: 24px" translate="no">check</span><span>Get notified about relevant papers</span></div><div class="ds-signup-banner-reasons-item"><span class="material-symbols-outlined" style="font-size: 24px" translate="no">check</span><span>Save papers to use in your research</span></div><div class="ds-signup-banner-reasons-item"><span class="material-symbols-outlined" style="font-size: 24px" translate="no">check</span><span>Join the discussion with peers</span></div><div class="ds-signup-banner-reasons-item"><span class="material-symbols-outlined" style="font-size: 24px" translate="no">check</span><span>Track your impact</span></div></div></div><script>(() => { // Set up signup banner show/hide behavior: // 1. 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As the literature on this subject is still scant, new parametric models for calculating the lifespan of OLED are proposed in this work. The Design of Experiment (DoE) methodology is used for cost and accuracy reasons. Different lifespan models based on thermal and electrical experimental aging tests are proposed. As stress factors, current density, temperature and their interactions, which are rarely taken into account in aging studies are simultaneously involved. The analysis of the model parameters highlights the prevalence of temperature compared to current density on the luminance performance of OLEDs. Non-linear models appear as the most accurate.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Modeling the Luminance Degradation of OLEDs Using Design of Experiments","attachmentId":119081258,"attachmentType":"pdf","work_url":"https://www.academia.edu/124950727/Modeling_the_Luminance_Degradation_of_OLEDs_Using_Design_of_Experiments","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/124950727/Modeling_the_Luminance_Degradation_of_OLEDs_Using_Design_of_Experiments"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="1" data-entity-id="80065905" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/80065905/Parametric_lifespan_models_for_OLEDs_using_Design_of_Experiments_DoE_">Parametric lifespan models for OLEDs using Design of Experiments (DoE)</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="153545290" href="https://bip31.academia.edu/LaurentCanale">Laurent Canale</a></div><p class="ds-related-work--metadata ds2-5-body-xs">2018 IEEE Industry Applications Society Annual Meeting (IAS), 2018</p><p class="ds-related-work--abstract ds2-5-body-sm">Modeling the lifespan of OLED (Organic Light-Emitting Diode) is a complex task: different factors may impact the lifespan, with possible interactions between them. However, the literature on this subject is still scant. This work proposes new parametric models for the OLED lifespan. For cost and accuracy reasons, the Design of Experiment (DoE) methodology is used for the estimation of model parameters. Different models are computed from thermal and electrical experimental aging tests. These innovative models involve, simultaneously, the current density, the temperature and their interactions, which are rarely taken into account in aging studies. The analysis of the model parameters highlights the prevalence of temperature compared to current density on the OLED luminance performance.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Parametric lifespan models for OLEDs using Design of Experiments (DoE)","attachmentId":86571423,"attachmentType":"pdf","work_url":"https://www.academia.edu/80065905/Parametric_lifespan_models_for_OLEDs_using_Design_of_Experiments_DoE_","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/80065905/Parametric_lifespan_models_for_OLEDs_using_Design_of_Experiments_DoE_"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="2" data-entity-id="124950725" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/124950725/Photometric_and_Electrical_Characterizations_of_Large_Area_OLEDs_Aged_Under_Thermal_and_Electrical_Stresses">Photometric and Electrical Characterizations of Large-Area OLEDs Aged Under Thermal and Electrical Stresses</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="37857668" href="https://univ-tlse.academia.edu/GeorgesZissis">Georges Zissis</a></div><p class="ds-related-work--metadata ds2-5-body-xs">IEEE Transactions on Industry Applications, 2019</p><p class="ds-related-work--abstract ds2-5-body-sm">The aim of this paper is to identify the electrical signatures of degradations of large area organic light emitting diodes (41cm² active area), subjected to various stress conditions. Three Philips GL55 OLEDs were stressed under three distinct temperature values; 23°C, 40°C and 60°C at a stress current density of J=15 mA/cm² (rated current density: J n =9.49 mA/cm²). Under thermal and electrical stresses, an increase of the operating voltage was observed with stress time but thermal stress alone did neither affect the operating voltage nor the luminance values up to 60°C.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Photometric and Electrical Characterizations of Large-Area OLEDs Aged Under Thermal and Electrical Stresses","attachmentId":119081230,"attachmentType":"pdf","work_url":"https://www.academia.edu/124950725/Photometric_and_Electrical_Characterizations_of_Large_Area_OLEDs_Aged_Under_Thermal_and_Electrical_Stresses","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/124950725/Photometric_and_Electrical_Characterizations_of_Large_Area_OLEDs_Aged_Under_Thermal_and_Electrical_Stresses"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="3" data-entity-id="116749593" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/116749593/A_unified_OLED_aging_model_combining_three_modeling_approaches_for_extending_AMOLED_lifetime">A unified OLED aging model combining three modeling approaches for extending AMOLED lifetime</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="213634367" href="https://independent.academia.edu/ChihaoXu">Chihao Xu</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Journal of the Society for Information Display</p><p class="ds-related-work--abstract ds2-5-body-sm">Aging is still the most challenging issue for organic light‐emitting diodes (OLEDs), which causes the image‐sticking artifacts on active‐matrix organic light‐emitting diode (AMOLED) displays and limits their lifetime. To overcome this demerit, an aging model is necessary to compensate for aging artifacts. In this paper, we present a unified OLED aging model, which combines three feasible modeling approaches of OLED degradation, namely, data‐counting, electro‐optical, and correlation methods. The model can be used to predict the efficiency decay of OLED pixels during operation. It mitigates weaknesses and limitations of each of these three models and deploys their strengths, respectively. In the first aging stage, the data‐counting model is prioritized, and in the later stages, it is calibrated using the correlation model. The dependency of the efficiency decay on the operation point of OLED is covered by the electro‐optical model. The unified model is based on both phenomenal and ph...</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"A unified OLED aging model combining three modeling approaches for extending AMOLED lifetime","attachmentId":112792500,"attachmentType":"pdf","work_url":"https://www.academia.edu/116749593/A_unified_OLED_aging_model_combining_three_modeling_approaches_for_extending_AMOLED_lifetime","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/116749593/A_unified_OLED_aging_model_combining_three_modeling_approaches_for_extending_AMOLED_lifetime"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="4" data-entity-id="126612525" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/126612525/Stress_Testing_of_Organic_Light_Emitting_Diode_Panels_and_Luminaires">Stress Testing of Organic Light- Emitting Diode Panels and Luminaires</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="40973940" href="https://independent.academia.edu/LynnDavis8">Lynn Davis</a></div><p class="ds-related-work--metadata ds2-5-body-xs">2018</p><p class="ds-related-work--abstract ds2-5-body-sm">Luminaires and other lighting devices using organic light-emitting diode (OLED) sources have many advantages over their competitors for indoor lighting, including thin form factors that produce highly diffuse, potentially low-glare, lighting with excellent color rendering properties. However, several significant issues with OLED products have limited their commercial acceptance to date, including source efficacy, source lifetime, driver performance, and initial costs. The U.S. Department of Energy (DOE) has released four reports on OLED technologies to provide the lighting industry with information on the state of the technology. These reports include the evaluation of two different field deployment sites, a market analysis, and an independent assessment of the performance of several commercially available OLED products. This report builds on previous DOE efforts with OLED technology by updating information on a previously benchmarked OLED product (the Chalina luminaire from Acuity Brands) and provides new benchmarks on the performance of Brite 2 and Brite Amber OLED panels from OLEDWorks. During the tests described here, samples of these devices were subjected to continuous operation in stress tests at elevated ambient temperature environments of 35°C or 45°C. In addition, samples were also operated continuously at room temperature in a room temperature operational life test (RTOL). One goal of this study was to investigate whether these test conditions can accelerate failure of OLED panels, either through panel shorting or an open circuit in the panel. These stress tests are shown to provide meaningful acceleration of OLED failure modes, and an acceleration factor of 2.6 was calculated at 45°C for some test conditions. In addition, changes in the photometric properties of the emitted light (e.g., luminous flux and chromaticity maintenance) was also evaluated for insights into the long-term stability of these products compared to earlier generations. Because OLEDs are a lighting system, electrical testing was also performed on the panel-driver pairs to provide insights into the impact of the driver on long-term panel performance.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Stress Testing of Organic Light- Emitting Diode Panels and Luminaires","attachmentId":120463806,"attachmentType":"pdf","work_url":"https://www.academia.edu/126612525/Stress_Testing_of_Organic_Light_Emitting_Diode_Panels_and_Luminaires","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/126612525/Stress_Testing_of_Organic_Light_Emitting_Diode_Panels_and_Luminaires"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="5" data-entity-id="122997532" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/122997532/Effect_of_high_thermal_stress_on_the_organic_light_emitting_diodes_OLEDs_performances">Effect of high thermal stress on the organic light emitting diodes (OLEDs) performances</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="29251811" href="https://utem.academia.edu/SitiHajarSheikhMdFadzullah">Siti Hajar Sheikh Md Fadzullah</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Synthetic Metals, 2019</p><p class="ds-related-work--abstract ds2-5-body-sm">The configuration of an organic light emitting diode (OLED) that combines different types of material to form a complete, functional device has induced an interlayer stress. This situation can further affect the performances of OLED, especially under high-temperature conditions as regards to different values of the thermal expansion coefficient (CTE) between the layers. Hence, this paper presents the thermal behavior of OLEDs under such conditions specifically in non-operated mode (no electrical current is given during the experiment). A batch of commercially available OLEDs has been employed. They were exposed to several temperatures in a controlled oven, including temperatures that higher than the glass transition temperature (T g) limit of the polymer material (∼126 ℃). It was observed that the luminance value had dramatically dropped by 90% from the initial value after the OLEDs were stressed at 135 ℃, whereas the voltage-drop greatly escalated from 8.5 V to 30.2 V. Via FIB-FESEM analysis, the presence of voids (layer mismatch) was evident due to interfacial thermal stress imparted between the layers. The voids had allowed the infiltration of moisture and oxygen into the device and eventually led to the formation of bubble-like defects on top of the cathode's surface. This condition has resulted in deterioration of electrons injection path and permanently changed the morphological structures of the devices. Through calculations, it was verified that the interfacial thermal stress between the layers reduced about 50% as the thickness of the polymer layer was increased by two times of its initial dimension.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Effect of high thermal stress on the organic light emitting diodes (OLEDs) performances","attachmentId":117536604,"attachmentType":"pdf","work_url":"https://www.academia.edu/122997532/Effect_of_high_thermal_stress_on_the_organic_light_emitting_diodes_OLEDs_performances","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/122997532/Effect_of_high_thermal_stress_on_the_organic_light_emitting_diodes_OLEDs_performances"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="6" data-entity-id="80278914" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/80278914/Selected_Problems_Related_to_the_Durability_of_Organic_Structures_OLED_">Selected Problems Related to the Durability of Organic Structures (OLED)</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="19393763" href="https://independent.academia.edu/ZbigniewPorada">Zbigniew Porada</a></div><p class="ds-related-work--metadata ds2-5-body-xs">2019</p><p class="ds-related-work--abstract ds2-5-body-sm">Organic light emitting diodes (OLED) are surface light sources, wherein the thickness of the active layer polymer is generally not greater than 500 nm. The rapid development of OLED technology dates back to 2000 years. In 2002, the first Active Matrix OLED panels, and in 2007. It demonstrated a prototype TV made in OLED technology. The most important disadvantage of the displays produced by the OLED technology is that the stability of such organic materials is not very high. OLED emitting structures covered by an aging processes that depend on a number of factors and cause a systematic decrease in the luminance of the emitted light. The paper proposes a mathematical model describing the process of aging in OLED structures, which satisfactorily describes the aging of such structures and allows the calculation of time, after which the luminance of the emitted light reaches 50% of its initial value (contractual service life).</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Selected Problems Related to the Durability of Organic Structures (OLED)","attachmentId":86713721,"attachmentType":"pdf","work_url":"https://www.academia.edu/80278914/Selected_Problems_Related_to_the_Durability_of_Organic_Structures_OLED_","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/80278914/Selected_Problems_Related_to_the_Durability_of_Organic_Structures_OLED_"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="7" data-entity-id="105288902" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/105288902/Experimental_and_modeling_studies_of_automotive_qualified_OLEDs_under_electrical_stress">Experimental and modeling studies of automotive-qualified OLEDs under electrical stress</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="15526276" href="https://independent.academia.edu/onurferhanoglu">onur ferhanoglu</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Microelectronics Reliability, 2020</p><p class="ds-related-work--abstract ds2-5-body-sm">In this paper, we aimed to investigate the reliability of an organic light-emitting diode (OLED) and propose a SPICE compatible electrical model for automotive exterior lighting applications. The proposed model smoothly provides the forward and reverse current-voltage relation and also dynamic capacitive behavior of OLED is included in the model. The Automotive Electronics Council-Qualified (AEC-Q) OLED samples that are currently used in a rear stop lamp have been electrically stressed with the current density of J = 11.5 mA/cm 2 (25% more than the nominal current density value) at room temperature. The model was presented through theoretical equations for forward and reverse current-voltage characteristics and impedance behavior of OLED. The simulated and experimental results are in close agreement with each other. We characterized the intrinsic capacitance, operational voltage, wavelength, and luminance variation of OLED aged under electrical stress for 7040 h. We utilized a simple setup to monitor variations in light intensity of the tested device with a CMOS camera. Under pure electrical stress, the dominant wavelength was slightly red-shifted by 3.29 nm, the threshold voltage of the OLED is increased from 4.2 V to 5.25 V, and luminance decayed to 88% of the initial luminance with stress time, whereas spectral shape was not affected.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Experimental and modeling studies of automotive-qualified OLEDs under electrical stress","attachmentId":104783520,"attachmentType":"pdf","work_url":"https://www.academia.edu/105288902/Experimental_and_modeling_studies_of_automotive_qualified_OLEDs_under_electrical_stress","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/105288902/Experimental_and_modeling_studies_of_automotive_qualified_OLEDs_under_electrical_stress"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="8" data-entity-id="89554536" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/89554536/Towards_a_generic_OLED_lifetime_model">Towards a generic OLED lifetime model</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="32999382" href="https://independent.academia.edu/UnderwoodIan">Ian Underwood</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Journal of the Society for Information Display, 2009</p><p class="ds-related-work--abstract ds2-5-body-sm">The limitations of t 1/2 lifetime testing for OLED displays are discussed in the context of permanent and recoverable luminance decay. Different pixel drive schemes, operating temperature, and schemes of gray-level generation are all found to be important in determining the operational lifetime where both permanent and recoverable contributions to the luminance decay exist. In addition, the importance of assessing lifetime with respect to a particular usage model is introduced and a method of lifetime characterization is devised to account for all of the factors discussed. The method measures luminance degradation over a series of operating cycles where the stress factors on the display are randomly generated for each cycle. The luminance degradation is then analyzed with linear regression, and the regression fit coefficients give an understanding of the degradation in different usage models so that an assessment of the display's suitability for a particular application can be made.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Towards a generic OLED lifetime model","attachmentId":93338099,"attachmentType":"pdf","work_url":"https://www.academia.edu/89554536/Towards_a_generic_OLED_lifetime_model","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/89554536/Towards_a_generic_OLED_lifetime_model"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="9" data-entity-id="10239102" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/10239102/Accelerated_Life_Test_of_High_Brightness_Light_Emitting_Diodes">Accelerated Life Test of High Brightness Light Emitting Diodes</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="25061105" href="https://unipd.academia.edu/EnricoZanoni">Enrico Zanoni</a></div><p class="ds-related-work--metadata ds2-5-body-xs">IEEE Transactions on Device and Materials Reliability, 2008</p><p class="ds-related-work--abstract ds2-5-body-sm">Short-term accelerated life test activity on high brightness light emitting diodes is reported. Two families of 1-W light-emitting diodes (LEDs) from different manufacturers were submitted to distinct stress conditions: high temperature storage without bias and high dc current test. During aging, degradation mechanisms like light output decay and electrical property worsening were detected. In particular, the degradation in light efficiency induced by thermal storage was found to follow an exponential law, and the activation energy of the process was extrapolated. Aged devices exhibited a modification of the package epoxy color from white to brown. The instability of the package contributes to the overall degradation in terms of optical and spectral properties. In addition, an increase in thermal resistance was detected on one family of LEDs. This increase induces higher junction temperature levels during operative conditions. In order to correlate the degradation mechanisms and kinetics found during thermal stress, a high dc current stress was performed. Results from this comparative analysis showed similar behavior, implying that the degradation process of dc current aged devices is thermal activated due to high temperatures reached by the junction during stress. Finally, the different effects of the stress on two families of LEDs were taken into account in order to identify the impact of aging on device structure.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Accelerated Life Test of High Brightness Light Emitting Diodes","attachmentId":47472414,"attachmentType":"pdf","work_url":"https://www.academia.edu/10239102/Accelerated_Life_Test_of_High_Brightness_Light_Emitting_Diodes","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/10239102/Accelerated_Life_Test_of_High_Brightness_Light_Emitting_Diodes"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div></div></div><div class="ds-sticky-ctas--wrapper js-loswp-sticky-ctas hidden"><div class="ds-sticky-ctas--grid-container"><div class="ds-sticky-ctas--container"><button class="ds2-5-button js-swp-download-button" data-signup-modal="{"location":"continue-reading-button--sticky-ctas","attachmentId":111041030,"attachmentType":"pdf","workUrl":null}">See full PDF</button><button class="ds2-5-button ds2-5-button--secondary js-swp-download-button" data-signup-modal="{"location":"download-pdf-button--sticky-ctas","attachmentId":111041030,"attachmentType":"pdf","workUrl":null}"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span>Download PDF</button></div></div></div><div class="ds-below-fold--grid-container"><div class="ds-work--container js-loswp-embedded-document"><div class="attachment_preview" data-attachment="Attachment_111041030" style="display: none"><div class="js-scribd-document-container"><div class="scribd--document-loading js-scribd-document-loader" style="display: block;"><img alt="Loading..." src="//a.academia-assets.com/images/loaders/paper-load.gif" /><p>Loading Preview</p></div></div><div style="text-align: center;"><div class="scribd--no-preview-alert js-preview-unavailable"><p>Sorry, preview is currently unavailable. You can download the paper by clicking the button above.</p></div></div></div></div><div class="ds-sidebar--container js-work-sidebar"><div class="ds-related-content--container"><h2 class="ds-related-content--heading">Related papers</h2><div class="ds-related-work--container js-related-work-sidebar-card" data-collection-position="0" data-entity-id="47647286" data-sort-order="default"><a class="ds-related-work--title js-related-work-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/47647286/Modeling_the_luminance_degradation_of_OLEDs_using_Design_of_Experiments_DoE_">Modeling the luminance degradation of OLEDs using Design of Experiments (DoE)</a><div class="ds-related-work--metadata"><a class="js-related-work-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="153545290" href="https://bip31.academia.edu/LaurentCanale">Laurent Canale</a></div><p class="ds-related-work--metadata ds2-5-body-xs">IEEE Transactions on Industry Applications</p><div 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characteristics","attachmentId":85153672,"attachmentType":"pdf","work_url":"https://www.academia.edu/77930765/How_thermal_environment_affects_OLEDs_operational_characteristics","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-related-work-grid-card-view-pdf" href="https://www.academia.edu/77930765/How_thermal_environment_affects_OLEDs_operational_characteristics"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-related-work-sidebar-card" data-collection-position="4" data-entity-id="30830397" data-sort-order="default"><a class="ds-related-work--title js-related-work-grid-card-title ds2-5-body-md ds2-5-body-link" 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