High-efficiency ultra-thin Cu_(2)ZnSnS_(4) solar cells by double-pressure sputtering with spark plasma sintered quaternary target  

作　　者：Ping Fan Zhigao Xie Guangxing Liang Muhammad Ishaq Shuo Chen Zhuanghao Zheng Chang Yan Jialiang Huang Xiaojing Hao Yi Zhang Zhenghua Su 

机构地区：[1]Shenzhen Key Laboratory of Advanced Thin Films and Applications,College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China [2]School of Photovoltaic and Renewable Energy Engineering,UNSW,Sydney,NSW 2052,Australia [3]Institute of Photoelectronic Thin Film Devices and Technology and Tianjin Key Laboratory of Thin Film Devices and Technology,Nankai University,Tianjin 300350,China

出　　处：《Journal of Energy Chemistry》2021年第10期186-194,I0006,共10页能源化学（英文版）

基　　金：supported by the National Key R&D Program of China(No.2018YFE0203400);the Science and Technology plan project of Shenzhen(JCYJ20190808120001755);the National Natural Science Foundation of China(No.62074102);the Key Project of Department of Education of Guangdong Province(No.2018KZDXM059)China。

摘　　要：In recent years,Cu_(2)ZnSnS_(4)(CZTS)semiconductor materials have received intensive attention in the field of thin-film solar cells owing to its non-toxic and low-cost elements.In this work,double-pressure sputtering technology is applied to obtain highly efficient and ultra-thin(-450 nm)pure Cu_(2)ZnSnS_(4)(CZTS)solar cell.Using mixed materials with sulfides and copper powder as a quaternary target via spark plasma sintering(SPS)method and adopting double-layer sputtering(high+low pressure),a highly adhesive and large-grained CZTS thin film is achieved.As a result,the damage to the surface of Mo contact is decreased so that the reflectivity of incident light can be improved.Moreover,the composition of CZTS film was more uniform and the secondary phase separation at the Mo interface was reduced.Therefore,the interface defect state and deep level defect density in corresponding device with double-pressure is reduced and the ratio of depletion thickness to absorption layer thickness can reached to 0.58,which promoted the collection of photogenerated carriers.Finally,an efficiency of 9.3%for ultra-thin(~450 nm)CZTS film solar cell is obtained.

关 键 词：CZTS ULTRA-THIN Solar cell SPS SPUTTERING 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TB383.2[一般工业技术—材料科学与工程]