Asymmetric Small Molecule as Interface "Governor" for FAPbI3 Perovskite Solar Cells

被引：8

作者：

Miao, Yawei ^{[1
,2
]}

Zhai, Mengde ^{[1
]}

Zhao, Zhenxiao ^{[1
]}

Ding, Xingdong ^{[1
]}

Xia, Ziyang ^{[1
]}

Wang, Haoxin ^{[1
]}

Wang, Linqin ^{[3
]}

Chen, Cheng ^{[1
]}

Cheng, Ming ^{[1
]}

机构：

[1] Jiangsu Univ, Inst Energy Res, Zhenjiang 212013, Peoples R China

[2] Shandong Univ, Inst Frontier & Interdisciplinary Sci, Sci Ctr Mat Creat & Energy Convers, Qingdao 266237, Peoples R China

[3] Westlake Univ, Ctr Artificial Photosynth Solar Fuels, Sch Sci, Hangzhou 310024, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2023年 / 14卷 / 44期

基金：

中国国家自然科学基金;

关键词：

EFFICIENT; FILMS;

D O I：

10.1021/acs.jpclett.3c02539

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：

Delicate interface modification is necessary for improving the photovoltaic performance of a perovskite solar cell (PSC). Herein, two asymmetric small molecules, termed BTD-DA and BTD-PA are designed and synthesized to govern the perovskite/Spiro-OMeTAD interface. The molecule BTD-PA featuring a donor-acceptor-acceptor (D-A-A ') configuration shows a larger molecule dipole and a better effect on defect passivation and energy level regulation through the strong interaction between the pyridine group in BTD-PA and the surficial uncoordinated Pb2+. Consequently, the PSCs based on the BTD-PA treatment harvest a champion power conversion efficiency (PCE) of 24.46% for a 0.09 cm(2) active area and 22.46% for the 1 cm(2) device. Moreover, the long-term stability of FAPbI(3) PSCs is also significantly improved because of the enhanced hydrophobicity and the inhibited phase transition of the FAPbI(3) film with BTD-PA treatment. Our research provides a new strategy for interfacial engineering to boost the PCE and stability of the FAPbI(3) PSCs.

引用

页码：9883 / 9891

页数：9

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