Multifunctional Small Molecule as Buried Interface Passivator for Efficient Planar Perovskite Solar Cells

被引：77

作者：

Wu, Meizi ^{[1
]}

Duan, Yuwei ^{[1
]}

Yang, Lu ^{[1
]}

You, Peng ^{[2
]}

Li, Zhijun ^{[3
]}

Wang, Jungang ^{[1
]}

Zhou, Hui ^{[1
]}

Yang, Shaomin ^{[1
]}

Xu, Dongfang ^{[1
]}

Zou, Hong ^{[1
]}

Liu, Zhike ^{[1
]}

机构：

[1] Shaanxi Normal Univ, Sch Mat Sci & Engn, Shaanxi Key Lab Adv Energy Devices, Shaanxi Engn Lab Adv Energy Technol,Key Lab Appl S, Xian 710119, Peoples R China

[2] Shenzhen Technol Univ, Coll New Mat & New Energies, Shenzhen 518118, Peoples R China

[3] Taiyuan Univ Technol, Res Ctr Adv Mat Sci & Technol, Key Lab Interface Sci & Engn Adv Mat, Minist Educ, Taiyuan 030024, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2023年 / 33卷 / 22期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

high efficiencies; interface passivation; perovskite solar cells; small molecules; SnO2;

D O I：

10.1002/adfm.202300128

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The improvement of power conversion efficiency (PCE) and stability of the perovskite solar cell (PSC) is hindered by carrier recombination originating from the defects at the buried interface of the PSC. It is crucial to suppress the nonradiative recombination and facilitate carrier transfer in PSC via interface engineering. Herein, P-biguanylbenzoic acid hydrochloride (PBGH) is developed to modify the tin oxide (SnO2)/perovskite interface. The effects of PBGH on carrier transportation, perovskite growth, defect passivation, and PSC performance are systematically investigated. On the one hand, the PBGH can effectively passivate the trap states of Sn dangling bonds and O vacancies on the SnO2 surface via Lewis acid/base coordination, which is conducive to improving the conductivity of SnO2 film and accelerating the electron extraction. On the other hand, PBGH modification assists the formation of high-quality perovskite film with low defect density due to its strong interaction with PbI2. Consequently, the PBGH-modified PSC exhibits a champion power conversion efficiency (PCE) of 24.79%, which is one of the highest PCEs among all the FACsPbI(3)-based PSCs reported to date. In addition, the stabilities of perovskite films and devices under high temperature/humidity and light illumination conditions are also systematically studied.

引用

页数：10

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