碲化锌复合背接触层对碲化镉太阳电池性能的影响  

EFFECTS OF ZnTe COMPLEX BACK CONTACTS ON CdTe SOLAR CELLS

作　　者：冯良桓[1] 蔡伟[1] 郑家贵[1] 蔡亚平[1] 黎兵[1] 张静全[1] 武莉莉[1] 朱居木[1] 邵烨[1] 

机构地区：[1]四川大学材料科学系,成都610064

出　　处：《太阳能学报》2001年第4期401-408,共8页Acta Energiae Solaris Sinica

基　　金：国家"九五"攻关项目 (编号 96 A17 0 3 0 2 0 3);国家自然科学基金资助项目 (批准号 596 72 0 36 )

摘　　要：碲化镉太阳电池的流行结构为n CdS p CdTe。通过对其能带结构的分析 ,采用ZnTe :Cu作背接触层 ,再在p CdTe和ZnTe :Cu之间引入不掺杂的ZnTe作过渡层 ,以改进这种电池的结特性和载流子收集。从实验上对三种结构的CdTe太阳电池进行了对比研究 ,结果表明复合的ZnTe ZnTe :Cu背接触层 ,的确能大幅度提高CdTe太阳电池的转换效率。这种结构的电池经电子 2 0 5计量站测试 ,转换效率已达 11 6 %。The current structure of CdTe solar cells is n-CdS/p-CdTe.According to analysis of the energy band constructions of the solar cells,ZnTe:Cu layer is used as a back contact and an un-doped ZnTe layer is introduced as a buffer between p-CdTe and ZnTe:Cu layers,in order to improve the junction characteristics and carrier collection.The three structures of CdTe solar cells are fabricated and compared in experiments. Results show that a complex back contact ZnTe/ZnTe:Cu largely increass the efficiency of CdTe solar cells.The cells with complex back contact layer are measured by The Electronic Measurement Lab 205,and their highest efficiency is 11.6%.

关 键 词：碲化锌背接触层 碲化镉 太阳能电池 性能 

分 类 号：TM914[电气工程—电力电子与电力传动] TM615