Metastable Behavior on Cesium Fluoride-Treated Cu(In1-x,Gax)Se2 Solar Cells
Metastable Behavior on Cesium Fluoride-Treated Cu(In1-x,Gax)Se2 Solar Cells
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氟化铯处理的 Cu(In1-x,Gax)Se2 太阳能电池的亚稳态行为
DOI：
10.1002/pssr.201900701
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Tokio Nakada
中科院分区：
文献类型：
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作者：
Ishwor Khatri;Takahiko Yashiro;Tzu-Ying Lin;Mutsumi Sugiyama;Tokio Nakada
研究了氟化铯（CsF）处理的Cu(In1-x,Gax)Se2（CIGS）太阳能电池在热光浸泡（HLS）和热浸泡（HS）处理下的亚稳行为。HLS增加开路电压、填充系数、效率和净载流子浓度，降低短路电流密度，而热浸泡处理则相反。在硒蒸气中对CIGS薄膜进行脑脊液沉积处理的性能，以及更接近化学计量铜含量，并没有减轻HLS后开路电压的改善。这些结果反驳了碱处理CIGS太阳能电池中HLS总有益效应的vse - vcudivacancy复合物的传统概念。由于HLS和HS处理，在CsF -处理装置中观察到的亚稳行为可以用表面含碱新化合物的特定行为和/或表面和块体区域碱金属的迁移来解释。
Metastable behavior of cesium fluoride (CsF)‐treated Cu(In1–x,Gax)Se2(CIGS) solar cells is investigated under heat‐light soaking (HLS) and heat‐soaking (HS) treatments. HLS increases open‐circuit voltage, fill factor, efficiency, and net carrier concentration and decreases short‐circuit current density, whereas heat‐soaking treatment acts oppositely. The performance of a CsF postdeposition treatment to CIGS thin film in selenium vapor, and closer to stoichiometry copper content, did not mitigate the open‐circuit voltage improvement after HLS. These results argue the traditional concept of theVSe–VCudivacancy complex for the total beneficial effect of HLS in alkali‐treated CIGS solar cells. The metastable behavior observed in the CsF‐treated devices due to the HLS and HS treatments is explained by the specific behavior of alkali‐containing new compounds at the surface and/or the migration of alkali metals at the surface and bulk regions.