硝磷酸腐蚀的CdTe太阳电池性能  

Performance of nitric-phosphoric acid etched CdTe solar cells

作　　者：郝瑞英[1] 李卫[1] 郑家贵[1] 冯良桓[1] 陈茜[1] 

机构地区：[1]四川大学材料科学与工程学院材料科学系,成都610064

出　　处：《功能材料与器件学报》2007年第2期107-112,共6页Journal of Functional Materials and Devices

基　　金：国家高技术研究与发展计划(No.2003AA513010);四川省科技攻关项目(No.05GG021-003-3);辐射物理及技术教育部重点实验室(四川大学)(No.K2005-10).

摘　　要：CdTe薄膜的腐蚀是制作CdS/CdTe光伏电池的重要技术之一,本实验采用硝磷酸溶液(硝酸1%+磷酸70%+去离子水29%)腐蚀CdTe薄膜,通过XRD测试发现在CdTe膜上生成了碲层。随后,在腐蚀后的CdTe薄膜上分别沉积了几种结构的背接触层,并制备出相应结构的CdTe太阳能光伏电池。通过电池的光、暗I-V和C-V特性测试,以ZnTe/ZnTe:Cu/Ni为背接触的小面积太阳电池,其性能优于其它背接触的电池。实验结果表明器件性能与碲的生成和铜的扩散密切相关。The chemical etching of CdTe thin films is one of important techniques in preparation of CdTe solar cells. In this paper, the CdTe thin films were etched with a mixture of nitric - phosphoric acid in water （NP） （HNO3 1%, H3PO4 70%, and de -ionized H20 29% ）. And a Te layer was found on the etched CdTe films by the X - ray diffraction （XRD） measurement. Several types of back - contact layers were then deposited on the etched CdTe thin films to complete the fabrication of CdTe solar cells. From the dark and illuminated I - V and C - V measurements, higher efficiency has been demonstrated for the small area CdTe solar cells of ZnTe/ZnTe ： Cu/Ni. And this kind of solar cells shows better performance than those with the other back contacts. The results also imply the close relationship between the device performance and the Te layer formation and Cu diffusion.

关 键 词：硝磷酸(NP) 背接触 太阳电池 

分 类 号：TK514[动力工程及工程热物理—热能工程]