High-efficiency kesterite thin-film solar cells fabrication based on low-cost process

• 作 者: Xiangyun Zhao Yining Pan Wangxian Chen Ziyi Huang Fengqing Zhang Fangyang Liu
• 机 构: School of Metallurgy and Environment, Central South University, Changsha 410083,China
• 出 处: 第八届新型太阳能材料科学与技术学术研讨会
• 发表日期: 2021年8期
• 关键词: CZTSSe kesterite air atmosphere scrap brass low-cost process

　　Cu2ZnSn(S,Se)4 (CZTSSe) semiconductor,owing to the good photoelectric properties and earth-abundant element composition,is one of the most promising light absorption materials for solar cells.To date,high-performance CZTSSe materials are all fabricated by precursor preparation and post-annealing.The precursor is usually coated with a precursor solution containing a high-purity metal salt in a vacuum or an inert atmosphere,which increases process costs and restrict the prospects for large-scale production.In this paper,we focused on the low-cost preparation process.The precursor was coated in the air atmosphere rather than in an inert atmosphere.The device based on this method yielded 12.18% certified efficiency[1],which was the highest efficiency of the CZTSSe device fabricated based on air atmosphere.To further reduce the cost,we replaced the high-purity metal salts with counterparts recovered from the scrap brass.After selenization,the high-quality absorber with compact and smooth morphology can be obtained for the device fabrication.The solar cell device,based on the recycled scrap brass,showed a certified efficiency of 11.39%.