In Situ erovskitoid Engineering at SnO2 Interface toward Highly Efficient and Stable Formamidinium Lead Triiodide Perovskite Solar Cells

被引：25
作者：
Ai, Yuquan [1 ]
Zhang, Yang [1 ]
Song, Jing [1 ]
Kong, Tengfei [1 ]
Li, Yahong [1 ]
Xie, Haibing [1 ]
Bi, Dongqin [1 ]
机构：
[1] Sun Yat Sen Univ, Sch Mat Sci & Engn, State Key Lab Optoelect Mat & Technol, Guangdong Prov Key Lab Low Carbon Chem & Proc Ene, Guangzhou 510275, Peoples R China
来源：
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2021年 / 12卷 / 43期
关键词：
Humidity conditions - Light-harvesting - Nonradiative recombination - Power conversion efficiencies - Stress condition - Tetrabutylammonium fluorides;
D O I：
10.1021/acs.jpclett.1c03002
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The black-phase formamidinium lead triiodide (alpha-FAPbI(3)) perovskite has turned out to be one of the most efficient light harvesting materials. However, the phase stability of FAPbI(3) is a long-standing issue. Herein, we introduce a layer of tetrabutylammonium fluoride (TBAF) on SnO2, which would form an in situ layer of TBAPbI(3) perovskitoid at the SnO2/FAPbI(3) interface by interacting with PbI2. The results show that this strategy could improve the conductivity of SnO2, passivate the defects in perovskite, improve the phase stability of alpha-FAPbI(3), and retard the nonradiative recombination in the device. As a result, we obtain a champion device with a power conversion efficiency of 23.1% under AM 1.5 G illumination of 100 mW/cm(2). The unencapsulated devices can maintain excellent stability under illumination, thermal stress, and humidity conditions, respectively.
引用
收藏
页码：10567 / 10573
页数：7
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