Perovskite Solar Cells: Increasing Stability & Durability

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Several perovksite materials are vulnerable to environmental conditions like moisture and heat. You can improve your device stability through intrinsic modifications such as using mixed A-cations (e.g., using formamidinium and Cesium alongside/ instead of methylammonium) and halides (e.g., adding bromine to iodine). You can also use additives to strengthen the crystal structure. There are also several extrinsic methods that can improve device stability include encapsulation techniques to protect cells from environmental factors. These strategies aim to enhance the durability and efficiency of perovskite solar cells, making them more viable for long-term use. Intrinsic Improvements Mixed Cations One of the main causes of perovskite instability is the hydroscopic nature of the organic cations, especially methylammonium. 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You can still place orders by emailing us on <a href="mailto:info@ossila.com">info@ossila.com</a>, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.</p> </div> </div>  <main> <div id="informational-page"> <h1>Perovskite Solar Cells: Methods of Increasing Stability & Durability</h1> <div class="container"> <img alt="Perovskite Solar Cells: Methods of Increasing Stability & Durability" class="featured-image" height="280" loading="lazy" src="https://www.ossila.com/cdn/shop/files/full-spectrum-perovskite-quantum-dots.jpg?v=1718958780&crop=center&width=1000&height=280" width="1340"> <p>Perovskite solar cells face several stability challenges. Several <a href="/collections/perovskite-materials">perovksite materials</a> are vulnerable to environmental conditions like moisture and heat. You can improve your device stability through intrinsic modifications such as using mixed A-cations (e.g., using formamidinium and Cesium alongside/ instead of methylammonium) and halides (e.g., adding bromine to iodine). You can also use additives to strengthen the crystal structure. There are also several extrinsic methods that can improve device stability include encapsulation techniques to protect cells from environmental factors. These strategies aim to enhance the durability and efficiency of perovskite solar cells, making them more viable for long-term use.</p> <h2>Intrinsic Improvements</h2> <hr> <h3>Mixed Cations</h3> <p>One of the main causes of perovskite instability is the hydroscopic nature of the organic cations, especially methylammonium. Additionally, methylammonium lead iodide (MAPbI<sub>3</sub>) can show high temperature vulnerability, which makes it unsuitable for use in commercial solar cells. <span class="tooltip-icon quot" data-tooltip-content="2015. Intrinsic Thermal Instability of Methylammonium Lead Trihalide Perovskite"></span> More information is available in “<a href="/pages/perovskite-solar-cell-degradation-causes" title="Perovskite Solar Cells: Causes of Degradation" target="_blank"><strong>Perovskite Solar Cells: Causes of Degradation</strong></a>”. As such, one way to improve perovskite solar cell stability is to replace the organic “A-cation” in the ABX<sub>3</sub> structure.</p> <p>The organic cation has little impact on the electrical properties or band structure of the perovskite layer. Its main role is to balance charge within the crystal structure. However, the size of the “A-cation” can have a noticeable effect on lattice structure. <span class="tooltip-icon quot" data-tooltip-content="2014. Formamidinium lead trihalide: a broadly tunable perovskite for efficient planar..."></span> The subsequent size of the B-X bond can also affect the band gap and stability of a perovskite solar cell. <span class="tooltip-icon quot" data-tooltip-content="2014. Formamidinium lead trihalide: a broadly tunable perovskite for efficient planar..."></span> Therefore, by varying the ratios of A-cations in the precursor, lattice qualities can be tuned/altered. The suitability of an A-cation for use in a perovskite structure is determined by its tolerance factor (t), where:</p> <figure><img alt="Perovskite A-cation tolerance factor equation" height="108" loading="lazy" src="https://www.ossila.com/cdn/shop/files/perovskite-cation-tolerance-factor-equation.png?v=1551096532&width=240&height=108" width="240"></figure> <p>Where r<sub>i</sub> is the ionic radii, r<sub>A</sub> is the radius of the cation, and r<sub>Pb</sub> is the radius of the lead molecule. <span class="tooltip-icon quot" data-tooltip-content="2015. Intrinsic Thermal Instability of Methylammonium Lead Trihalide Perovskite"></span> </p> <figure><img alt="Perovskite crystal phases (depending on tolerance factor)" height="291" loading="lazy" src="https://www.ossila.com/cdn/shop/files/Perovskite_Solar_Cells_Methods_of_Increasing_Stability_Durability-01.svg?v=1679652095" width="600"> <figcaption>Possible crystal phases of perovskites, depending on tolerance factor. Adapted from Leijtens et al. (2017). Tolerance factors from Li et al. (2015).</figcaption> </figure> <p>Different cation sizes can result in lead halide octahedral distortion and tilting. <span class="tooltip-icon quot" data-tooltip-content="2017. Towards enabling stable lead halide perovskite solar cells; interplay between..."></span> If this tilting is significant, it can shift the phase of the perovskite crystal into an undesirable state for photovoltaic activity. This is represented by the tolerance factor. If the tolerance factor is 1, then this produces a cubic perovskite structure. However, if the tolerance value falls between 0.7 and 0.9, then the tetragonal or orthombic phases can be induced. <span class="tooltip-icon quot" data-tooltip-content="2015. Intrinsic Thermal Instability of Methylammonium Lead Trihalide Perovskite"></span> <span class="tooltip-icon quot" data-tooltip-content="2017. Towards enabling stable lead halide perovskite solar cells; interplay between..."></span> MAPbI<sub>3</sub> is tetragonal at room temperature (this change is shown in the figure above).</p> <figure><img alt="A-cations used in perovskites (cesium, methyammonium, formamidinium)" height="226" loading="lazy" src="https://www.ossila.com/cdn/shop/files/Perovskite_Solar_Cells_Methods_of_Increasing_Stability_Durability-02.svg?v=1679652096" width="600"> <figcaption>Ball and stick models showing A-cation candidates used in perovskites. Cs, MA and FA. Dark blue: Cesium, Grey: Hydrogen, Light blue: carbon, Red: Nitrogen</figcaption> </figure> <p>Formamidinium (FA) has been used as an alternative to MA since it is a similar size to methylammonium as shown in the figure above. However, due to its high tolerance factor, <span>f</span><span>ormamidinium lead iodide</span> (FAPbI<sub>3</sub>) exists in a non-perovskite hexagonal phase at room temperature. <span class="tooltip-icon quot" data-tooltip-content="2017. Towards enabling stable lead halide perovskite solar cells; interplay between..."></span> Although a black perovskite phase can be achieved by heating, this non-perovskite phase becomes more significant over time and limits the stability of a device. This can be compensated by introducing smaller inorganic cations into the perovskite, such as cesium (Cs) and rubidium (Ru). The addition of a small amount of Cs into FA-based perovskites assists the crystallisation of the “black perovskite” phase. When exposed to a humid atmosphere, cesium formamidinium lead iodide (CsFAPbI) perovskites showed almost zero changes compared to the FA-only perovskite, which showed serious decomposition. <span class="tooltip-icon quot" data-tooltip-content="2018. Recent Progress in Long-term Stability of Perovskite Solar Cells"></span> By combining MA and FA cations, a tolerance factor of almost 1 is reached. <span class="tooltip-icon quot" data-tooltip-content="2017. Towards enabling stable lead halide perovskite solar cells; interplay between..."></span> </p> <p>Saliba et al. demonstrated a mixed-halide, quadruple-cation perovskite solar cell that achieved efficiencies of 19% on 0.5 cm<sup>2</sup> area, and held 95% of its original performance at 85°C for 500 hours under illumination. <span class="tooltip-icon quot" data-tooltip-content="2016. Incorporation of rubidium cations into perovskite solar cells improves photovoltaic..."></span> Using mixed-halide and mixed-cation perovskites, solar cells that have good efficiencies and (relatively) good stabilities can be achieved.</p> <h3>Mixed Halide</h3> <p>Another stoichiometric change that can improve perovskite solar cell stability is replacing iodine with other halides (such as chlorine or bromine). Perovskite crystals are most stable in the pseudo-cubic state (e.g. <span>halfway between cubic and tetragonal)</span>, and MAPbI<sub>3</sub> creates perovskites in the tetragonal state. Bromine (Br) and Chlorine (Cl) are different sizes to iodine, and therefore create perovskite crystals with a different lattice structure. By varying the ratios of these halides, band structure and stability can be changed. <span class="tooltip-icon quot" data-tooltip-content="2013. Chemical Management for Colorful, Efficient, and Stable Inorganic–Organic Hybrid Nanostructured..."></span> <span class="tooltip-icon quot" data-tooltip-content="2016. Stability of perovskite solar cells"></span> For example, MAPbBr<sub>3</sub> perovskites have more of a cubic structure compared to MAPbI<sub>3</sub> perovskites (like the one shown in the figure below). This is a more stable crystal structure.</p> <figure><img alt="Lattice structures of MAPbI3 and MAPbBr3" height="600" loading="lazy" src="https://www.ossila.com/cdn/shop/files/Perovskite_Solar_Cells_Methods_of_Increasing_Stability_Durability-03.svg?v=1679652095" width="597"> <figcaption>Illustrations depicting the lattice structure of MAPbI<sub>3</sub> and MAPbBr<sub>3</sub>. Adapted from Noh et al. (2013).</figcaption> </figure> <p>Noh et al. (2013) showed that cells containing only iodide have an initially higher power conversion efficiency (PCE) at 35% relative humidity (RH). However, when exposed to 55% RH, the iodide-only cells degrade rapidly whereas the mixed-halide cells (0.2:0.8 Br:I) maintain their initial PCE for up to 20 days. <span class="tooltip-icon quot" data-tooltip-content="2013. Chemical Management for Colorful, Efficient, and Stable Inorganic–Organic Hybrid Nanostructured..."></span> However, this study also shows that replacing more than 20% of the iodine with bromine leads to a noticeable reduction in perovskite solar cell efficiency.</p> <p>Ossila provide a selection of <a href="https://www.ossila.com/collections/perovskite-precursor-materials" title="Perovskite PV Materials | Ossila" target="_blank"><strong>selection of Perovskite </strong></a><span><a href="https://www.ossila.com/collections/perovskite-precursor-materials" title="Perovskite PV Materials | Ossila" target="_blank"><strong>inks, precursors and interface materials</strong></a> to help you with your research.</span></p> <h3>Additives</h3> <p>Many additives have been trialled to increase the stability of perovskite solar cells. Some additives, such as butylphosphonic acid 4-ammonium chloride (4-ABPACl), can form cross-links between adjacent perovskite grains, which reduces moisture vulnerabilities at grain boundaries in the perovskite layer. <span class="tooltip-icon quot" data-tooltip-content="2016. Stability of perovskite solar cells"></span> Other additives can provide scaffold structures or nucleation sites to aid in producing uniform films or reducing external penetration. <span class="tooltip-icon quot" data-tooltip-content="2018. Recent Progress in Long-term Stability of Perovskite Solar Cells"></span> Zhou et al. demonstrate that by using a polyethylene glycol (PEG) polymer scaffold, PCEs can be increased and thermal stability is improved in MAPb(I<sub>x</sub>Cl<sub>1-x</sub>)<sub>3</sub> devices. <span class="tooltip-icon quot" data-tooltip-content="2016. Stability of perovskite solar cells"></span> It has been suggested that the hydroscopic properties of the PEG can even lead to a self-healing effect, reducing moisture damage.</p> <p>Studies have indicated that additives (e.g. polyvinylpyrrolidone) can be used to control cluster size in the precursor solution. The addition of acids to the precursor solution can also improve the stability of a perovskite film over time. A more detailed review of additives in perovskites can be found here. <span class="tooltip-icon quot" data-tooltip-content="2018. Recent Progress in Long-term Stability of Perovskite Solar Cells"></span> </p> <h3>2D Perovskites</h3> <p>2D perovskites can be made by using larger A-cations (e.g. PEA<sup>+</sup>) acting as a spacer cation. In pure 2D perovskites, only spacer cations are used, leading to single sheets of separated perovskite crystals – in this case the number of layers (n) of perovskite material is 1. In a 3D perovskite structure, n-> ∞. This is shown in the figure below.</p> <p>As is often the case with perovskite solar cells, there is a trade-off between efficiency and stability. 2D perovskites are more stable. However, they have a larger band gap compared to their 3D counterparts, so they have poorer optical properties. By mixing different stoichiometric quantities of MAI and spacer cations (like PEAI), the n can be tuned. <span class="tooltip-icon quot" data-tooltip-content="2018. Recent Progress in Long-term Stability of Perovskite Solar Cells"></span> This can be utilised to create 2D-3D hybrid perovskites with enhanced optical properties and stability.</p> <figure><img alt="Crystal structure of 2d/3d hybrid perovskite" height="208" loading="lazy" src="https://www.ossila.com/cdn/shop/files/Perovskite_Solar_Cells_Methods_of_Increasing_Stability_Durability-04.svg?v=1679652096" width="300"> <img alt="Crystal structure of 3d perovskite where n approaches infinity" height="208" loading="lazy" src="https://www.ossila.com/cdn/shop/files/Perovskite_Solar_Cells_Methods_of_Increasing_Stability_Durability-05.svg?v=1679652096" width="258"> <figcaption>Schematics of the crystal structures of an n=2 2D/3D hybrid perovskite (left) and a 3D perovskite (with effectively n approaching ∞)</figcaption> </figure> <p>An n=3 layered perovskite achieved an PCE of 4.7% in 2016 and showed no signs of decomposition after 46 days without encapsulation. <span class="tooltip-icon quot" data-tooltip-content="2016. Stability of perovskite solar cells"></span> Recently, encapsulated 2D/3D perovskites have sustained PCEs of 11.2% over 10,000 hours in controlled conditions. <span class="tooltip-icon quot" data-tooltip-content="2017. One-Year stable perovskite solar cells by 2D/3D interface engineering"></span> </p> <h2>Extrinsic Improvements</h2> <hr> <h3>Encapsulation</h3> <p>A key element of improving perovskite solar cell stability is the full encapsulation of devices. This will – at least partially – protect them from external degradation catalysts, such as ambient moisture and UV light. A common method of encapsulation is to encompass the cell in a <a href="/products/pv-oled-encapsulation-epoxy" title="Encapsulation Epoxy for PV/OLEDs | Ossila" target="_blank"><strong>UV-curable epoxy resin</strong></a>, followed by a <a href="/products/encapsulation-coverslips" title="Glass Encapsulation Coverslips for PV/OLED Devices | Ossila" target="_blank"><strong>glass cover slip</strong></a> as shown in our “<a href="/pages/solar-cell-encapsulation" title="Solar Cell Encapsulation in a Glove Box" target="_blank"><strong>How To Encapsulate Solar Cells In A Glove Box</strong></a>” page. Some studies have used a hydroscopic substance to absorb moisture before it can reach the perovskite layer. These all significantly improve the solar cell stability.</p> <figure><img alt="Epoxy on perovskite solar cell, then sealed with glass coverslip" height="213" loading="lazy" src="https://www.ossila.com/cdn/shop/files/encapsulated-perosvkite-solar-cell-uv-epoxy.png?v=1551109550&width=600&height=213" width="600"> <figcaption>UV-curable epoxy applied to a perovskite solar cell and then sealed with a glass cover slip. From <a href="/pages/video-guide-to-make-efficient-air-processed-perovskite-devices" title="How to Make Efficient Air-Processed Perovskite Devices | Ossila" target="_blank">Ossila’s perovskite fabrication video</a>.</figcaption> </figure> <p>However, when considering the scalability of perovskites, it is important that devices can be compatible with roll-to-roll processing. There has been promising work looking at polymer encapsulation methods. When encapsulated using polyethylene terephthalate (fully sealed around the device), 10,000-hour lifetimes have been achieved. <span class="tooltip-icon quot" data-tooltip-content="2013. Interlaboratory outdoor stability studies of flexible roll-to-roll coated organic photovoltaic..."></span> This polymer layer is clearly effective in preventing moisture and oxygen penetration. Additionally, luminescent photopolymers can be used in polymer encapsulations to reduce UV degradation. <span class="tooltip-icon quot" data-tooltip-content="2016. Improving efficiency and stability of perovskite solar cells with photocurable..."></span> These photopolymers downshift the UV light - which may be absorbed by the perovskite to increase efficiency, and also protects the perovskite. It has been shown that by encasing a perovskite solar cell with a fluoropolymer coating, cells can maintain 3-month lifetimes in outdoor conditions at high efficiencies. <span class="tooltip-icon quot" data-tooltip-content="2016. Improving efficiency and stability of perovskite solar cells with photocurable..."></span> </p> <h2>Summary</h2> <hr> <p>Improving the stability of perovskite solar cells is one of the most pressing issues faced by the field right now. Like the causes of degradation, the approaches to increase stability fall into two broad categories. By making intrinsic improvements - for example by changing the perovskite stoichiometry - you can reduce innate vulnerabilities of the perovskite itself. Extrinsic improvements (such as encapsulation) can reduce exposure to degradation factors. However, there is still much work to be done in both these areas to make a reliable and stable perovskite solar cell.</p> <div class="info" style="background-color: #cbd3eb; border-left: 15px solid #39499C; margin-bottom: 10px; padding: 10px 5px 1px 10px;"> <p><strong>Mary’s notes: </strong> In researching this article, I found these reviews very helpful: <span class="tooltip-icon quot" data-tooltip-content="2017. Towards enabling stable lead halide perovskite solar cells; interplay between..."></span> , <span class="tooltip-icon quot" data-tooltip-content="2018. Recent Progress in Long-term Stability of Perovskite Solar Cells"></span> <span class="tooltip-icon quot" data-tooltip-content="2016. Stability of perovskite solar cells"></span> . I have tried to summarise key studies discussed in them, but for a more in-depth discussion of the stability processes, these papers are a good place to start.</p> </div> <a class="green-banner" data-track-content="" href="https://www.ossila.com/collections/perovskite-materials"> <p data-content-name="/pages/perovskite-solar-cells-methods-increase-stability" data-content-piece="cta-perovskite-materials">Perovskite Materials</p> <img alt="Perovskite Materials" height="120" loading="lazy" src="https://www.ossila.com/cdn/shop/files/Perovskite-Inks.jpg?crop=center&width=600&height=120" width="600"> <button>View now</button> </a> <div class="tile-container"> <div class="card-box card-truncate"> <a href="https://www.ossila.com/pages/tandem-solar-cells"> <img alt="Tandem Solar Cell" loading="lazy" src="https://www.ossila.com/cdn/shop/files/using-solar-panels.jpg?crop=center&width=160&height=160"> </a> <a href="https://www.ossila.com/pages/tandem-solar-cells">Tandem Solar Cell</a> <p>A tandem solar cell is a subtype of multijunction solar cells. They are crucial in photovoltaics (PV) research and industry. These cells can convert a broader range of solar spectra into electricity. And these can potentially achieve higher power conversion efficiencies (PCE) than conventional single-junction cells. By stacking multiple layers with different bandgaps, tandem cells capture more of the solar spectrum. This allows them to surpass the fundamental efficiency limit (radiative efficiency limit) of single-junction cells and convert sunlight more efficiently.</p> <a href="https://www.ossila.com/pages/tandem-solar-cells">Read more...</a> </div> <div class="card-box card-truncate"> <a href="https://www.ossila.com/pages/perovskite-tandem-solar-cells"> <img alt="Perovskite Tandem Solar Cells" loading="lazy" src="https://www.ossila.com/cdn/shop/files/outside-solar-panels.jpg?crop=center&width=160&height=160"> </a> <a href="https://www.ossila.com/pages/perovskite-tandem-solar-cells">Perovskite Tandem Solar Cells</a> <p>Perovskite tandem solar cells are a hot topic for solar researchers due to their potential for achieving high efficiencies at lower costs. These cells have garnered significant attention, especially after LONGi Solar set a record efficiency of 33.9%. This achievement has popularized perovskite tandem solar cells and motivated ongoing research. Perovskite tandem solar cells are a type of tandem solar cell, which uses perovskite materials as one, or both, of the active layers. The bandgap of a perovskite can be easily tuned by changing the perovskite composition, meaning that it can be paired with other semiconducting materials, such as silicon or organic photovoltaics. Alternatively, 2 complementary perovskites can be used to absorb light from a wider range of the solar spectrum.</p> <a href="https://www.ossila.com/pages/perovskite-tandem-solar-cells">Read more...</a> </div> </div> <div class="panel panel-default"> <div class="panel-body"> <h3>References</h3> <hr> <ul> <li> <a target="_blank" rel="nofollow" href="https://doi.org/10.1002/aenm.201500477" title="Intrinsic Thermal Instability of Methylammonium Lead Trihalide Perovskite">Intrinsic Thermal Instability of Methylammonium Lead Trihalide Perovskite</a>, Advanced Energy Materials (2015) </li> <li> <a target="_blank" rel="nofollow" href="https://doi.org/10.1039/C3EE43822H" title="Formamidinium lead trihalide: a broadly tunable perovskite for efficient planar heterojunction solar cells">Formamidinium lead trihalide: a broadly tunable perovskite for...</a>, Energy & Environmental Science (2014) </li> <li> <a target="_blank" rel="nofollow" href="https://doi.org/10.1039/c7ta00434f" title="Towards enabling stable lead halide perovskite solar cells; interplay between structural, environmental, and thermal stability">Towards enabling stable lead halide perovskite solar cells;...</a>, Journal Of Materials Chemistry A (2017) </li> <li> <a target="_blank" rel="nofollow" href="https://doi.org/10.24840/2183-6493_001.002_0007" title="Recent Progress in Long-term Stability of Perovskite Solar Cells">Recent Progress in Long-term Stability of Perovskite Solar...</a>, U.Porto Journal Of Engineering (2018) </li> <li> <a target="_blank" rel="nofollow" href="https://doi.org/10.1126/science.aah5557" title="Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance">Incorporation of rubidium cations into perovskite solar cells...</a>, Science (2016) </li> <span id="all-references" class="expandable"> <li> <a target="_blank" rel="nofollow" href="https://doi.org/10.1021/nl400349b" title="Chemical Management for Colorful, Efficient, and Stable Inorganic–Organic Hybrid Nanostructured Solar Cells">Chemical Management for Colorful, Efficient, and Stable Inorganic–Organic...</a>, Nano Letters (2013) </li> <li> <a target="_blank" rel="nofollow" href="https://doi.org/10.1016/j.solmat.2015.12.025" title="Stability of perovskite solar cells">Stability of perovskite solar cells</a>, Solar Energy Materials And Solar Cells (2016) </li> <li> <a target="_blank" rel="nofollow" href="https://doi.org/10.1038/ncomms15684" title="One-Year stable perovskite solar cells by 2D/3D interface engineering">One-Year stable perovskite solar cells by 2D/3D interface...</a>, Nature Communications (2017) </li> <li> <a target="_blank" rel="nofollow" href="https://doi.org/10.1016/j.solmat.2013.04.024" title="Interlaboratory outdoor stability studies of flexible roll-to-roll coated organic photovoltaic modules: Stability over 10,000h">Interlaboratory outdoor stability studies of flexible roll-to-roll coated...</a>, Solar Energy Materials And Solar Cells (2013) </li> <li> <a target="_blank" rel="nofollow" href="https://doi.org/10.1126/science.aah4046" title="Improving efficiency and stability of perovskite solar cells with photocurable fluoropolymers">Improving efficiency and stability of perovskite solar cells...</a>, Science (2016) </li> </span> </ul> <button data-toggle-text="Hide references" data-expand-target="all-references" class="anchor expand-link" type="button">View more references</button> </div> </div> <div class="panel panel-default"> <div class="panel-body"> <h3>Further Reading</h3> <hr> <ol> <li> <a href="https://doi.org/10.1021/acs.chemmater.5b04107" rel="nofollow" target="_blank">Stabilizing Perovskite Structures by Tuning Tolerance Factor: Formation of Formamidinium and Cesium Lead Iodide Solid-State Alloys</a>, Li, Z. et al., Chemistry Of Materials (2015)</li> </ol> </div> </div> <div class="panel panel-default"> <div class="panel-body"> <h3>Contributing Authors</h3> <hr> <p>Written by</p> <p class="no-margin"><a href="/pages/our-writers#mary-okane" title="Author Biography: Mary O'Kane">Dr. Mary O'Kane</a></p> <p class="text-muted">Application Scientist</p> </div> </div> <script type="application/ld+json"> { "@context": "https://schema.org", "@type": "Article", "abstract": "Perovskite solar cells face several stability challenges. Several perovksite materials are vulnerable to environmental conditions like moisture and heat. You can improve your device stability through intrinsic modifications such as using mixed A-cations (e.g., using formamidinium and Cesium alongside/ instead of methylammonium) and halides (e.g., adding bromine to iodine). You can also use additives to strengthen the crystal structure. There are also several extrinsic methods that can improve device stability include encapsulation techniques to protect cells from environmental factors. These strategies aim to enhance the durability and efficiency of perovskite solar cells, making them more viable for long-term use.", "author": [ { "@type": "Person", "name": "Dr. Mary O'Kane", "jobTitle": "Application Scientist" } ], "headline": "Perovskite Solar Cells: Causes of Degradation", "image": ["https://www.ossila.com/cdn/shop/files/encapsulated-perosvkite-solar-cell-uv-epoxy.png?v=1551109550&width=600&height=213"], "inLanguage": "en", "publisher": { "@type": "Organization", "name": "Ossila", "url": "https://www.ossila.com" }, "url": "https://www.ossila.com/pages/perovskite-solar-cells-methods-increase-stability" } </script> </div> </div> </main>  <div class="full-width-footer"> <footer id="footer" class="footer container"> <div class="clearfix footer-elems nav-footer" id="footer-links"> <div class="row"> <div class="col-xs-12 col-sm-3"> <span class="h2">Ossila</span> <ul class="nav-footer"> <li><a href="/pages/about">About Ossila</a></li> <li><a href="/pages/press-and-media">Press and Media</a></li> <li><a href="/pages/our-writers">Our Writing Team</a></li> <li><a href="/pages/awards-and-testimonials">Awards and Testimonials</a></li> <li><a href="/pages/feedback">Leave Feedback</a></li> <li><a href="/pages/terms-and-conditions">Terms and Conditions</a></li> <li><a href="/pages/privacy-policy">Privacy Policy</a></li> </ul> <span>Copyright © 2024 Ossila</span> </div> <div class="col-xs-12 col-sm-3"> <span class="h2">Join the Team</span> <ul class="nav-footer"> <li><a href="/pages/careers">Careers at Ossila</a></li> <li><a href="/pages/jobs-in-sheffield">Jobs in Sheffield</a></li> <li><a href="/pages/jobs-in-leiden">Jobs in Leiden</a></li> </ul> <span class="h2">Collaborate</span> <ul class="nav-footer"> <li><a href="/pages/reprinting-permissions">Free Digital Assets</a></li> <li><a href="/pages/conference-fund">Conference Sponsorship for Students</a></li> <li><a href="/pages/outreach-support">Science Outreach Support</a></li> <li><a href="/pages/graduation-awards-sponsorship">Graduation Awards</a></li> <li><a href="/pages/letters-of-support">Letters of Support</a></li> </ul> </div> <div class="col-xs-12 col-sm-3"> <span class="h2">Your Account</span> <ul class="nav-footer"> <li><a href="/account/login">Log In</a></li> <li><a href="/account/register">Create Account</a></li> </ul> <span class="h2">Order Information</span> <ul class="nav-footer"> <li><a href="/pages/how-to-order">How to Order</a></li> <li><a href="/pages/worldwide-shipping">Worldwide Shipping Charges</a></li> <li><a href="/pages/returns-and-cancellations">Returns and Cancellations</a></li> <li><a href="/pages/warranty-information">Warranty Information</a></li> <li><a href="/pages/distributors">Regional Distributors</a></li> <li><a href="/collections/deals-and-discounts">Deals and Discounts</a></li> <li><a href="/pages/price-drop-guarantee">Price Drop Guarantee</a></li> </ul> </div> <div class="col-xs-12 col-sm-3"> <span class="h2">Customer Support</span> <ul class="nav-footer"> <li><svg class="icon icon-envelope"><use xlink:href="#icon-envelope"></use></svg> <a href="/pages/contact-us">Send an Enquiry</a></li> <li><svg class="icon icon-envelope"><use xlink:href="#icon-envelope"></use></svg> <a href="mailto:info@ossila.com">info@ossila.com</a></li> <li class="no-padding-bottom"><a href="https://www.ossila.com/pages/about#our-locations" class="text-bold">Main Office</a></li> <li class="no-padding"><svg class="icon icon-phone"><use xlink:href="#icon-phone"></use></svg> +44 (0)114 2999 180</li> <li class="no-padding-top">Mon-Fri, 8:00-17:00 (GMT/BST)</li> <li class="no-padding-bottom"><a href="https://www.ossila.com/pages/about#our-locations" class="text-bold">EU Office</a></li> <li class="no-padding"><svg class="icon icon-phone"><use xlink:href="#icon-phone"></use></svg> +31 (0)718 081020</li> <li class="no-padding-top">Mon-Fri, 9:00-17:00 (CET/CEST)</li> </ul> </div> </div> <div class="text-center"> <span class="double-right-padding">Ossila Ltd</span> <span class="double-right-padding">Company Number 06920105</span> <span class="double-right-padding">VAT Number GB 978 2092 81</span> <span>EORI Number GB978209281000</span> </div> <div class="text-center"> <span class="double-right-padding">Ossila BV</span> <span class="double-right-padding">CCI number 84102241</span> <span class="double-right-padding">VAT Number NL 863097182B01</span> <span>EORI Number NL863097182</span> </div> </div> </footer> </div> <div id="bottom-banner" class="hidden"> <div id="cookie-banner" class="hidden"> <div class="container"> <div class="row"> <span class="col-xs-12 col-sm-8 no-margin pad-half-height">The Ossila website uses cookies for core functionality. 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