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">ECOGIZMO</a> </div> <h2>New solar cell efficiency record set</h2> <div class="summary_details_left"> <p>By <a href="/web/20101203184042/http://www.gizmag.com/author/noel-mckeegan/">Noel McKeegan</a></p> <p><em>22:36 January 26, 2009</em></p> </div> <div class="summary_details_right"> <p><img src="/web/20101203184042im_/http://www.gizmag.com/images/icons/splashyIcons/comments.png" alt=""/> <a href="#comments">3 Comments</a> </p> <p></p> </div> </div> <div id="hero_box" style="width: 530px;"> <a id="hero_link" href="/web/20101203184042/http://www.gizmag.com/new-solar-cell-efficiency-record-set/10841/picture/65404/"> <img src="https://web.archive.org/web/20101203184042im_/http://images.gizmag.com/hero/10841_27010953339.jpg" title="New world record solar cell (Image: Fraunhofer ISE)" width="530" height="298" alt="New world record solar cell (Image: Fraunhofer ISE)" border="0"/></a><div class="pic_caption"> <p>New world record solar cell (Image: Fraunhofer ISE)</p> </div> <div class="clear_both"></div> </div> <div class="article_body"> <div id="top_unit"></div> <script type="text/javascript" language="JavaScript"> </script> <script type="text/javascript" language="JavaScript" src="https://web.archive.org/web/20101203184042js_/http://pagead2.googlesyndication.com/pagead/show_ads.js"></script> <p>January 27, 2009 Researchers at the Fraunhofer Institute for Solar Energy Systems ISE have set a new record for solar cell efficiency. Using concentrated sunlight on a specially constructed multi-junction solar cell, the research group lead by Frank Dimroth has achieved 41.1% efficiency for the conversion of sunlight into electricity.</p> <p>The breakthrough, which surpasses the 40.7 percent efficiency previously demonstrated by <a href="https://web.archive.org/web/20101203184042/http://www.gizmag.com/go/6563/" target="_blank">Spectrolab</a> , involved the use of sunlight concentrated by a factor of 454 and focused onto a small 5 mm? multi-junction solar cell made out of GaInP/GaInAs/ Ge (gallium indium phosphide, gallium indium arsenide on a germanium substrate). Even at a higher sunlight concentration of 880, an efficiency of 40.4% was measured.</p> <p>“We are elated by this breakthrough,” says Frank Dimroth, head of the group “III-V – Epitaxy and Solar Cells” at Fraunhofer ISE. “At all times the entire team believed in our concept of the metamorphic triple-junction solar cells and our success today is made possible only through their committed work over the past years.”</p> <p>Multi-junction solar cells combine semiconductor compounds in layers to absorb almost all of the solar spectrum. The problem is that in combining these materials in a process known as metamorphic growth, defects occur in the lattice structure making it difficult to grow the III-V semiconductor layers with a high crystal quality. The Fraunhofer ISE researchers have overcome this issue by discovering a way to localize these defects in a region of the solar cell that is not electrically active, meaning that the active regions stay relatively defect free and higher efficiencies can be achieved.</p> <p>“The high efficiencies of our solar cells are the most effective way to reduce the electricity generation costs for concentrating PV systems,” says Dr. Andreas Bett, Department Head at Fraunhofer ISE. “We want that photovoltaics becomes competitive with conventional methods of electricity production as soon as possible. With our new efficiency results, we have moved a big step further towards achieving this goal!”</p> <p>Via: Fraunhofer Institute for Solar Energy Systems ISE (http://www.ise.fraunhofer.de/)</p> <div id="bottom_unit"> <script type="text/javascript" language="JavaScript"> </script> <script type="text/javascript" language="JavaScript" src="https://web.archive.org/web/20101203184042js_/http://pagead2.googlesyndication.com/pagead/show_ads.js"></script> </div> </div>  <span class="title">Share</span> <div id="article_share" class="dotsontop"> <span class="as_button"><script src="https://web.archive.org/web/20101203184042js_/http://www.stumbleupon.com/hostedbadge.php?s=1"></script></span> <script type="text/javascript"> (function() { var s = document.createElement('SCRIPT'), s1 = document.getElementsByTagName('SCRIPT')[0]; s.type = 'text/javascript'; s.async = true; s.src = 'https://web.archive.org/web/20101203184042/http://widgets.digg.com/buttons.js'; s1.parentNode.insertBefore(s, s1); })(); </script> <span class="as_button"><a href="https://web.archive.org/web/20101203184042/http://digg.com/submit?url=http%3A//www.gizmag.com/new-solar-cell-efficiency-record-set/10841/&title=New+solar+cell+efficiency+record+set" class="DiggThisButton DiggCompact"></a></span> <span class="as_button"><a href="https://web.archive.org/web/20101203184042/http://twitter.com/share" class="twitter-share-button" data-count="horizontal" data-via="gizmag">Tweet</a><script type="text/javascript" src="https://web.archive.org/web/20101203184042js_/http://platform.twitter.com/widgets.js"></script></span> <iframe src="https://web.archive.org/web/20101203184042if_/http://www.facebook.com/plugins/like.php?href=http://www.gizmag.com/new-solar-cell-efficiency-record-set/10841/&layout=standard&show_faces=false&width=530&action=like&font&colorscheme=light&height=30" scrolling="no" frameborder="0" id="facebook_like"></iframe> </div>   <div id="tags"> <span class="title">Tags</span> <div class="dotsontop"> <ul> <li>» <a href="/web/20101203184042/http://www.gizmag.com/tag/fraunhofer/" rel="tag">Fraunhofer</a></li> <li>» <a href="/web/20101203184042/http://www.gizmag.com/tag/solar/" rel="tag">Solar</a></li> <li>» <a href="/web/20101203184042/http://www.gizmag.com/tag/solar-cell/" rel="tag">Solar Cell</a></li> <li class="clear_both"></li> </ul> </div> </div> <div id="bing_unit">  <center> <div id="ns_bing_search"> <script language="javascript" type="text/javascript"> var ns_bing_siteid=23; var ns_bing_verbose=0; var ns_bing_description = ""; var ns_bing_title = document.title; var ns_bing_url = document.location; var ns_bing_metas=document.getElementsByTagName('head')[0].getElementsByTagName('meta'); for(var i=0,L=ns_bing_metas.length;i<L;i++){ if(ns_bing_metas[i].name.toLowerCase()=='description') ns_bing_description=ns_bing_metas[i].content; } var ns_bing_url = "https://web.archive.org/web/20101203184042/http://adv.netshelter.net/minisites/bing/extract.php?s="+ns_bing_siteid+"&u="+escape(escape(ns_bing_url))+"&t="+escape(escape(ns_bing_title))+"&d="+escape(escape(ns_bing_description))+"&v="+ns_bing_verbose; document.write(unescape('%3Cscript type="text/javascript" src="'+ns_bing_url+'"%3E%3C/script%3E')); </script> </div> </center>  </div>  <span class="title" id="comments">User Comments (3)</span> <div class="dotsontop" id="comment_dots">  <div id="comment-25333" class="a_comment"> <p> </p> <p>Researchers at the Fraunhofer Institute for Solar Energy Systems ISE achievement of 41.1% efficiency for the conversion of sunlight into electricity is indeed a major breakthrough in Solar Technology. ISEs reputation in Solar Technology is well known and they are world leaders. It is hoped this high efficiency will pave the way for wider application of solar power generation around the globe. Congratulations ISE for this great achievement. </p> <p> </p> <p>Dr.A.Jagadeesh Nellore (AP), India. </p> <p></p> <img src="/web/20101203184042im_/http://www.gizmag.com/images/comment.png" alt="comment"> <span class="name">Anumakonda Jagadeesh</span> <span class="date">- June 16, 2010 @ 11:06 am PDT</span> <div class="clear_both"></div> </div> <div id="comment-28396" class="a_comment"> <p>I wish these reports would mention the light spectrum (AM0, AM1, AM1.5 etc.).</p> <img src="/web/20101203184042im_/http://www.gizmag.com/images/comment.png" alt="comment"> <span class="name">Andrew M</span> <span class="date">- July 22, 2010 @ 10:07 pm PDT</span> <div class="clear_both"></div> </div> <div id="comment-29311" class="a_comment"> <p>Are these defects located around purpossed nucleation sites, like seeding a cloud?</p> <img src="/web/20101203184042im_/http://www.gizmag.com/images/comment.png" alt="comment"> <span class="name">Ronald Wade Cooper</span> <span class="date">- August 2, 2010 @ 11:08 pm PDT</span> <div class="clear_both"></div> </div> <div id="rss_comments"> <a href="rss/"><img src="/web/20101203184042im_/http://www.gizmag.com/images/rss_thisArticle.png" alt="RSS Feed for comments from this article"></a> <a href="/web/20101203184042/http://www.gizmag.com/allcomments/rss/" id="rss_allArticles"><img src="/web/20101203184042im_/http://www.gizmag.com/images/rss_allArticles.png" alt="RSS Feed for comments from all articles"></a> </div> </div> <span class="title">Post a Comment</span> <div class="dotsontop" id="comment_form_div"> <div id="comment_form"> <div id="comments_login"> <form action="javascript:sndReqArg('login_user', prep_ajax(document.login_form.email.value), prep_ajax(document.login_form.password.value), 10841, prep_ajax(''))" style="clear: both; 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