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onkeyup="$('fj_btn').href='forum.php?mod=redirect&ptid=81469&authorid=0&postno='+this.value" onkeydown="if(event.keyCode==13) {window.location=$('fj_btn').href;return false;}" title="跳转到指定楼层" /> <a href="javascript:;" id="fj_btn" class="z" title="跳转到指定楼层"><img src="static/image/common/fj_btn.png" alt="跳转到指定楼层" class="vm" /></a> </div> <strong> <a href="http://bbs.oecr.com/thread-81469-1-1.html" id="postnum515845" onclick="setCopy(this.href, '帖子地址复制成功');return false;"> <em>1</em>楼</a> </strong> <div class="pti"> <div class="pdbt"> </div> <div class="authi"> <img class="authicn vm" id="authicon515845" src="static/image/common/online_member.gif" /> <em id="authorposton515845">发表于 2009-1-22 21:15:24</em> <span class="pipe">|</span> <a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=81469&page=1&authorid=44196" rel="nofollow">只看该作者</a> <span class="none"><img src="static/image/common/arw_r.gif" class="vm" alt="回帖奖励" /></span> <span class="pipe show">|</span><a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=81469&extra=page%3D47&ordertype=1" class="show">倒序浏览</a> <span class="pipe show">|</span><a href="javascript:;" onclick="readmode($('thread_subject').innerHTML, 515845);" class="show">阅读模式</a> </div> </div> </div><div class="pct"><style type="text/css">.pcb{margin-right:0}</style><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_515845"> EFFICIENCY IMPROVEMENTS OF BACK-CONTACT TYPE PHOTOVOLTAIC CELLS<br /> <br /> <br /> ABSTRACT: A back-contact type photovoltaic cell is able to simultaneously offer high light absorption and reduced resistance loss for high current densities. However, the structure requires low surface recombination velocities. A floating emitter was examined to reduce recombination loss at the surface of a Si substrate with a passivation layer.<br /> The optimum specifications of the floating emitter were calculated using simulation analysis, and fabrication<br /> utilized the thermal diffusion and ion implantation methods. The surface recombination velocities were estimated<br /> by two-step effective lifetime measurements using the photo-conductance decay method. The velocity on the<br /> emitter increased from 150 cm/s to 9,800 cm/s, but the efficiency improved from 17.7% to 19.3%. It was confirmed that the floating emitter serves as an energy barrier to prevent minority carriers from flowing to the surface defects.<br /> Keywords: back contact, passivation, recombination</td></tr></table> <div class="pattl"> <ignore_js_op> <dl class="tattl"> <dt> <img src="static/image/filetype/pdf.gif" border="0" class="vm" alt="" /> </dt> <dd> <p class="attnm"> <a href="http://bbs.oecr.com/forum.php?mod=attachment&aid=MzU5MzJ8MGE4ZjExNTV8MTc2NjA5NDYwN3wwfDgxNDY5" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" id="aid35932" target="_blank">EFFICIENCY IMPROVEMENTS OF BACK-CONTACT TYPE PHOTOVOLTAIC CELLS BY A FLOATING EMITTER.pdf</a> <div class="tip tip_4" id="aid35932_menu" style="display: none" disautofocus="true"> <div class="tip_c"> <p class="y">2009-1-22 21:15 上传</p> <p>点击文件名下载附件</p> 下载积分: 光电贝 -10 元<br /> </div> <div class="tip_horn"></div> </div> </p> <p>434.73 KB, 下载次数: 21, 下载积分: 光电贝 -10 元</p> <p> </p> </dd> </dl> </ignore_js_op> </div> </div> <div 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