Br_2-甲醇蚀刻对CdTe太阳电池性能的影响  

Effects of CdTe Etching on Cell Properties by Br_2-Methanol

作　　者：覃文治[1] 郑家贵[1] 蔡伟[1] 冯良桓[1] 蔡亚平[1] 张静全[1] 李卫[1] 黎兵[1] 武莉莉[1] 李阳华[1] 岳磊[1] 郑华靖[1] 

机构地区：[1]四川大学材料科学系,四川成都610064

出　　处：《材料科学与工程学报》2005年第2期256-258,共3页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目 (50 0 760 30 ) ;863重点资助项目 :(2 0 0 3AA51 30 1 0 )

摘　　要：在镀上金属电极前 ,对CdTe表面进行化学蚀刻是制备高效率碲化镉薄膜太阳电池的关键技术之一。本实验用Br2 甲醇对热处理后的CdTe薄膜进行蚀刻 ,并利用XRD、AFM研究其结构、成分和形貌。结果表明 :蚀刻后的CdTe薄膜获得一银灰色的光洁表面 ,并发现CdTe薄膜表面产生一富Te层 ,蚀刻厚度达到 1μm获得性能最好的太阳电池。用Br2 甲醇蚀刻后的CdTe薄膜 ,采用ZnTe ZdTe:Cu复合层作为背接触层的过度层 ,已获得了转换效率为 13.38%的太阳电池。One of the important technic in the production of high efficiency thin-film CdTe solar cells is the CdTe film surface chemical etching before deposition of a metallic contact. The Br 2-Methanol was applied to etch the CdTe films after heat treatment. The structure, surface and other properties of the films were studied by using XRD and AFM. The results show that the etched films have a smooth surface with silvery grey colour. A layer of Te-rich on the CdTe surface was produced. The properties of CdTe solar cells are best when a 1μm thick of CdTe was etched. A conversion efficiency of 13.38% has been obtained in cells with an area of 0.5cm 2 with a complex back ZnTe/ZdTe:Cu when CdTe was etched by Br 2-methanol.

关 键 词：Br2-甲醇 蚀刻 CDTE太阳电池 

分 类 号：TB34[一般工业技术—材料科学与工程]