Efficient carbon-based planar CsPbBr3 perovskite solar cells with Li-doped amorphous Nb2O5 layer

Efficient carbon-based planar CsPbBr3 perovskite solar cells with Li-doped amorphous Nb2O5 layer
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具有锂掺杂非晶 Nb2O5 层的高效碳基平面 CsPbBr3 钙钛矿太阳能电池

DOI:
10.1016/j.jallcom.2020.155984
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发表时间:
2020-11
影响因子:
6.2
通讯作者:
Chu Junhao
Chu Junhao
中科院分区:
材料科学2区
文献类型:
--
作者:
Zhao Fei;Guo Yixin;Wang Xiang;Tao Jiahua;Li Zeng;Zheng Dongliang;Jiang Jinchun;Hu Zhigao;Chu Junhao

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为了提高CsPbBr3钙钛矿太阳能电池(PSC)的能量转换效率(PCE),电子传输层(ETL)必须具有容易的电子注入和引出特性。在这里,它表明,锂掺杂的非晶致密Nb2O5(Li:Nb2O5)可以有效地提高电子电导率,并促进低复合的电荷提取。与添加Nb2O5ETL的PSC相比,Li:Nb2O5基PSC的PCE从5.79%提高到7.06%。此外,Li:Nb2O5基CsPbBr3PSC在暴露于湿度为40%的空气中60天时表现出极好的稳定性。这项工作表明,离子掺杂为制备有效的ETL和高性能的无机PSC提供了新的机会。
Facile electron injection and extraction are two important attributes desired in electron transportation layer (ETL) to improve the power conversion efficiency (PCE) of planar CsPbBr3perovskite solar cell (PSC). Here, it is demonstrated that Li-doping of amorphous compact Nb2O5(Li: Nb2O5) can effectively increase the electronic conductivity and facilitate the charge extraction with low recombination. Comparing with the PSC with Nb2O5ETL, the PCE of the Li: Nb2O5-based PSC is enhanced from 5.79% to 7.06%. Furthermore, the Li: Nb2O5-based CsPbBr3PSC exhibits a fabulous stability when exposed in air with moisture of ∼40% for 60 days. This work shows that ion doping provides new opportunities for preparing effective ETLs and high-performance inorganic PSCs.
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