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电致发光成像技术在硅太阳能电池隐性缺陷检测中的应用
Authors
庞爱锁
李艳华
+4 more
武智平
潘淼
郑兰花
陈朝
Publication date
15 April 2011
Publisher
Abstract
论述了一种利用硅太阳能电池在一定偏压下的电致发光(Electrolum inescence,EL)成像来检测硅太阳能电池隐性缺陷的方法。硅太阳能电池的EL波长范围为850~1200 nm。正向偏压下的EL光强反映了少数载流子的浓度及其扩散长度,而反向偏压下的EL区和发光强度对应于电池的缺陷区域和缺陷密度。用硅CCD相机对硅太阳能电池的EL快速成像,然后根据EL成像的明暗强度可检测出电池的隐性缺陷。由于内在缺陷处EL强度比外在缺陷处受温度的影响更敏感,所以可利用电池缺陷处EL强度随温度变化的差异来辨别缺陷的类型
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Last time updated on 16/06/2016