CIGS薄膜太阳能电池用背电极性能研究  

Research on performance of back electrode for CIGS thin-film solar cells

作　　者：姚婷婷 彭塞奥 王天齐 甘治平 李刚 YAO Tingting;PENG Saiao;WANG Tianqi;GAN Zhiping;LI Gang(State Key Laboratory of Advanced Technology for Float Glass Technology,(CNBM)Bengbu Design&Research Institute for Glass Industry Co.Ltd,Bengbu,Anhui 233000,China;Silica-based Materials Laboratory of Anhui Province,(CNBM)Bengbu Design&Research Institute for Glass Industry Co.Ltd,Bengbu,Anhui 233000,China)

机构地区：[1]中建材蚌埠玻璃工业设计研究院有限公司浮法玻璃新技术国家重点实验室,安徽蚌埠233000 [2]中建材蚌埠玻璃工业设计研究院有限公司硅基材料安徽省实验室,安徽蚌埠233000

出　　处：《燕山大学学报》2021年第5期415-423,共9页Journal of Yanshan University

基　　金：安徽省科技重大专项资助项目(201903a05020017);安徽省重点研究与开发计划(202004b11020020);江苏省能量转换材料与技术重点实验室开放课题资助项目。

摘　　要：CIGS薄膜太阳能电池的传统背电极中的导电层为了满足电阻要求,必须使用较厚的Mo薄膜作为电子传导层进行电流传输,同时作为电子触头与CIS半导体接触。但较厚的Mo薄膜导致背电极内部应力较大、薄膜制备速度慢且成本高,因此,需开发厚度小、应力小、成本低的新型背电极。新型背电极需要具有较高的电流传输能力,并且经过高温硒化处理后电学性能不变。同时,尽可能地降低薄膜厚度以便节约成本。有鉴于此,本工作提出了采用CuZn合金薄膜代替Mo薄膜作为导电层。X射线衍射仪、扫描电子显微镜及电学性能等测试结果表明,当Brass相CuZn薄膜的膜厚逐渐增加时,结晶特性逐渐变好。并且CuZn薄膜表现出较高的载流子浓度,形成背电极后,电流传输性能依然较好。CuZn薄膜可用于部分替代Mo薄膜,增强背电极导电性能,并减小背电极内部应力,同时节约成本。In order to meet the resistance requirements of the conductive layer in the traditional back electrode of CIGS thin-film solar cells,a thicker Mo film must be used as an electron conductive layer for current transmission.Meanwhile,it also serves as an electronic point to contact the CIS semiconductor.However,the thicker Mo film leads to greater internal stress in the back electrode and slow film preparation speed as well as high cost.Therefore,it is necessary to develop a new type of back electrode with small thickness,low stress and low cost.The new back electrode needs to be of a higher current transmission capacity,and the electrical performance remains unchanged after the high-temperature selenization treatment.Also,the film thickness can be reduced as much as possible in order to save costs.In this paper,the CuZn alloy film is used as the conductive layer instead of Mo film.The test results of X-ray diffraction,scanning electron microscope and electrical properties show that the crystalline properties are gradually enhanced when the thickness of the Brass phase CuZn film increases.Meanwhile,the CuZn film exhibits a higher carrier concentration.After the back electrode is formed,the current transmission performance is still promising,and it can be used to partially replace the Mo thin film.The CuZn film can enhance the conductivity of the back electrode with the reduction in internal stress practical costs.

关 键 词：MO薄膜 CuZn薄膜 背电极 方块电阻 导电层 

分 类 号：TB34[一般工业技术—材料科学与工程]