材料科学
饱和电流
太阳能电池
能量转换效率
光电子学
溅射
无定形固体
电极
氮化物
图层(电子)
电流密度
光伏系统
溅射沉积
电压
纳米技术
薄膜
电气工程
结晶学
化学
物理
物理化学
量子力学
工程类
作者
Ting Wang,Bin Ye,Yongfeng Li,Zhanhui Ding,Jiayong Zhang,Chunkai Wang,Jia Liu
标识
DOI:10.1002/admi.202200393
摘要
Abstract An amorphous boron nitride (aBN) layer is inserted between Cu 2 ZnSn(S,Se) 4 (CZTSSe) films and Mo back electrode of CZTSSe solar cell by magnetron sputtering to mitigate the carrier recombination at back interface by tuning energy band alignment and suppressing formation of secondary phases and Mo(S,Se) 2 . The effect of the aBN layer on power conversion efficiency (PCE) of CZTSSe solar cell is investigated by numerical simulation and experiment. It is found that PCE is greatly improved via the insertion of suitable thick aBN layer, which is attributed to increased open‐circuit voltage ( V OC ) and fill factor (FF). By quantitative analysis, it is deduced that the increased V OC originates mainly from decrease in reverse saturation current density ( J 0 ), followed by increase in shunt resistance ( R Sh ), and the increased FF is mainly due to the decreased J 0 , followed by increased R Sh and decreased photogenerated current density ( J L ). By optimizing aBN thickness through tuning sputtering time, the PCE increases from 8.68% of CZTSSe solar cell without the aBN layer to 9.51% of the CZTSSe solar cell with aBN layer. The influence mechanism of the aBN layer on the PCE is suggested by analyzing quantitatively the effect of the aBN layer on J L and electrical parameters.
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