材料科学
开路电压
短路
热的
电压
光电子学
偏压
电场
电流(流体)
晶体硅
硅
快速热处理
电气工程
气象学
工程类
物理
量子力学
作者
Qingguo Zeng,Fa‐Jun Ma,Guangxing Guo,Hongchen Meng,Lang Zhou,Xiuqin Wei
标识
DOI:10.1016/j.mssp.2023.107854
摘要
Improvement of amorphous silicon/crystalline silicon heterojunction solar cells (HJT cells) by electro-thermal processing with the injected current greater than the short-circuit current (Isc) of the cells has been investigated. The results showed that, for the cells with a base efficiency level of 22.5% and an area of 244.32 cm2, forward current injections of 30–80 A yielded ∼0.60%abs efficiency gain on average, which was almost twice that by a 10 A injection. The improvement was mainly attributed to increased open-circuit voltage (Voc) and fill factor (FF). The lower the initial value of Voc or FF, the greater the increase was, and Isc was rather stable throughout the electro-thermal processing. Higher temperature and greater current are believed to favor the kinetics of the process. Light-thermal processing of HJT cells under electric field conditions of open-circuit, short-circuit, forward-voltage bias, and reverse-voltage bias were carried out. The results indicated that changes in the electric field do not affect the improvement of HJT cells by the light-thermal processing. It is encouraging that no considerable contact damages were found on the HJT cells electro-thermally processed in stacks, while the improvement was well kept, demonstrating the potential applicability of the electro-thermal processing for HJT cells on a production scale.
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