文献类型：期刊文献

英文题名：Unveiling the Selenization Reaction Mechanisms in Ambient Air-Processed Highly Efficient Kesterite Solar Cells

作者：Yu, Zixuan Li, Chuanhao Chen, Shuo Zheng, Zhuanghao Fan, Ping Li, Yingfen Tan, Manlin Yan, Chang Zhang, Xianghua Su, Zhenghua Liang, Guangxing

第一作者：Yu, Zixuan

通信作者：Su, ZH[1];Liang, GX[1]

机构：[1]Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen Key Lab Adv Thin Films & Applicat, Key Lab Optoelect Devices & Syst,Minist Educ & Gua, Shenzhen 518060, Peoples R China;[2]Guizhou Inst Technol, Coll Mat & Energy Engn, Guiyang 550003, Peoples R China;[3]Tsinghua Univ Shenzhen, Res Inst, Shenzhen 518055, Peoples R China;[4]Hong Kong Univ Sci & Technol Guangzhou, Jiangmen Lab Carbon Sci & Technol, Sustainable Energy & Environm Thrust, Guangzhou 510000, Peoples R China;[5]Univ Rennes, ISCR Inst Sci Chim Rennes, CNRS, UMR 6226, F-35000 Rennes, France

第一机构：Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen Key Lab Adv Thin Films & Applicat, Key Lab Optoelect Devices & Syst,Minist Educ & Gua, Shenzhen 518060, Peoples R China

通信机构：corresponding author), Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen Key Lab Adv Thin Films & Applicat, Key Lab Optoelect Devices & Syst,Minist Educ & Gua, Shenzhen 518060, Peoples R China.

年份：2023

卷号：13

期号：19

外文期刊名：ADVANCED ENERGY MATERIALS

收录：;EI(收录号：20231513864044);Scopus(收录号：2-s2.0-85151663805);WOS:【SCI-EXPANDED(收录号:WOS:000985084200001)】；

基金：This work was supported by National Natural Science Foundation of China (Nos. 62074102 and 62204067) China, Science and Technology plan project of Shenzhen (No. 20220808165025003) China. Guangdong Basic and Applied Basic Research Foundation (No. 2022A1515010979) China. The authors wish to acknowledge the assistance on (TEM/STEM/FIB) received from the Electron Microscope Center of the Shenzhen University.

语种：英文

外文关键词：efficiency; kesterite; selenization; solar cells

摘要：The selenization annealing process is vital for highly efficient kesterite solar cells. Generally, SnS is added during the selenization process, but excessive S and related defects are introduced. Meanwhile, the path of supplementing Sn has never been elucidated. Herein, in order to solve the above problems, a combination of strategies involving SnS and Sn or SnSe or SnSe2 is put forward. And the composition of the vapor inhibiting Sn loss (gaseous SnSe3) and the pathway through which SnSe3 facilitates the formation of Cu2ZnSn(SxSe1-x)(4) (CZTSSe) are clarified. When SnSe2 is added to SnS in the selenization process, grain fusion is effectively promoted. The high crystalline quality kesterite absorber makes the band bending at the GBs optimal and the interface recombination be effectively suppressed. Moreover, cation disorder is remarkably reduced. Therefore, the open-circuit voltage (V-oc) is significantly elevated from 508 to 546 mV with increased fill factor (FF) and short-circuit current density (J(sc)). A state-of-the-art ambient air-processed kesterite device with 12.89% efficiency is achieved, and the unveiled reaction mechanisms have guiding significance for further optimizing selenization atmosphere and elevating the efficiency of CZTSSe solar cells.