Fully Inorganic CsSnI3-Based Solar Cells with >6% Efficiency and Enhanced Stability Enabled by Mixed Electron Transport Layer
Fully Inorganic CsSnI3-Based Solar Cells with >6% Efficiency and Enhanced Stability Enabled by Mixed Electron Transport Layer
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DOI：
10.1021/acsami.0c16634
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发表时间：
2021-01-13
影响因子：
9.5
通讯作者：
Ye, Tao
中科院分区：
文献类型：
--
作者：
Ma, Shaoyang;Gu, Xiaoyu;Ye, Tao
全无机黑色正交体(B-Gamma)CsSnI3因其低毒和较高的理论功率转换效率(PCE)而成为钙钛矿太阳能电池(PSC)的候选材料。然而，到目前为止，已报道的B-Gamma CsSnI3 PSC的PCE仍然无法与其铅基或有机锡基对应物相比较。本文将由纳米氧化锌(NPs)和[6，6]-苯基-C61-丁酸甲酯(PCBM)组成的混合电子传输层(ETL)引入到倒置的B-γCsSnI3 PSCs中。混合ETL兼具了氧化锌和PCBM的优点。采用氧化锌-PCBM ETL的PSC器件的PCE最高，为6.08%，比纯PCBM ETL器件的PCE(4.53%)高34.2%，比纯ZnO ETL器件(4.72%)高28.8%。同时，在室温下放置60d后，在室温惰性条件下，混合的ZnO-PCBM ETL基PSC保持了初始PCE的71%，在30%相对湿度和室温的环境空气中放置20d，保持了67%的PCE。
Fully inorganic black orthorhombic (B-gamma) CsSnI3 has become a promising candidate for perovskite solar cell (PSC) thanks to its low toxicity and decently high theoretical power conversion efficiency (PCE). However, so far, the reported PCE of the B-gamma CsSnI3 PSC is still not comparable with its lead-based or organotin-based counterparts. Herein, a mixed electron transport layer (ETL) composed of ZnO nanoparticles (NPs) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) is incorporated into inverted B-gamma CsSnI3 PSCs. The mixed ETL exhibits the merits of both ZnO and PCBM. The highest PCE of 6.08% was recorded for the PSC with mixed ZnO-PCBM ETL, which is 34.2% higher than that of the device with plain PCBM ETL (PCE of 4.53%) and 28.8% superior to that of plain ZnO ETL-based device (PCE of 4.72%). Meanwhile, the mixed ZnO-PCBM ETL-based PSC retained 71% of its initial PCE under inert conditions at room temperature after 60 days of storage and maintained 67% PCE after 20 days of storage under ambient air at 30% relative humidity and room temperature.