Improvement of photovoltaic performance of perovskite solar cells by interface modification with CaTiO3

Improvement of photovoltaic performance of perovskite solar cells by interface modification with CaTiO3
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CaTiO3界面修饰改善钙钛矿太阳能电池的光伏性能

DOI:
10.1016/j.jpowsour.2019.227504
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发表时间:
2020-02
影响因子:
9.2
通讯作者:
Tian Xu
Tian Xu
中科院分区:
工程技术2区
文献类型:
--
作者:
Shuiping Li;Xin Li;Junyou Yang;Qinghui Jiang;Hui Lai;Yao Tan;Bo Xiao;Tian Xu

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ETL/钙钛矿界面对于钙钛矿太阳能电池(PSC)的光伏性能至关重要,因为其在电子传输和电荷复合中起关键作用。本文中,在mp-TiO 2和钙钛矿层之间容易地制备并结合了一层锐钛矿CaTiO 3。由于陷阱钝化效应和改性引起的最佳能级排列,促进了电子输运,同时有效地抑制了电荷复合。因此,冠军器件在增强的光伏性能下获得了19.12%的最大PCE。此外,通过改性,PSC的稳定性也得到了改善,即使在环境中暴露1000 h后,仍能保持约85%的初始效率。
The ETL/perovskite interface is crucial for the photovoltaic performance of perovskite solar cells (PSCs) because of its key role in electrons transport and charge recombination. Herein, an ultrathin CaTiO3layer has facilely been fabricated and incorporated between the mp-TiO2and perovskite layers. Due to the trap passivation effect and the optimized energy level alignment induced by modification, the electron transport is facilitated while the charge recombination is suppressed effectively. Therefore, the champion device gains a maximum PCE of 19.12% with the enhanced photovoltaic performance. In addition, the stability of PSCs has also been ameliorated by modification, and about 85% of the initial efficiency can be maintained even after exposure in ambient for 1000h.
钙钛矿太阳能电池界面工程的最新进展
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