首页|Efficient Environment-friendly Lead-free Tin Perovskite Solar Cells Enabled by Incorporating 4-Fluorobenzylammonium Iodide Additives

Efficient Environment-friendly Lead-free Tin Perovskite Solar Cells Enabled by Incorporating 4-Fluorobenzylammonium Iodide Additives

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Development of tin(Sn)-based perovskite solar cells(PSCs)largely lags behind that of lead counterparts due to fast crystallization process of Sn perovskite and numerous defects in both bulk and surface of Sn perovskite films.Herein,this work reports a facile strategy of introducing 4-fluorobenzylammonium iodide(FBZAI)as additives into Sn perovskite precursor to synergistically modulate the roles of benzylamine and fluorine in Sn-based PSCs.Incorporation of FBZAI can increase crystallinity,passivate defects,and inhibit the oxidation of Sn2+,leading to suppression of nonradiative recombination and enhancement of charge transport and collection in devices.As a result,the best-performing Sn-based PSC with the FBZAI additive achieves the maximum PCE of 13.85％with the enhanced fill factor of 77.8％and open-circuit voltage of 0.778 V.Our unencapsulated device exhibits good stability by maintaining 95％of its initial PCE after 160 days of storage.

4-fluorobenzylammonium iodidedefect passivationlead-free Sn perovskitesperovskite solar cellsstability

Shengli Zou、Shengqiang Ren、Yiting Jiang、Yuanfang Huang、Wenwu Wang、Changlei Wang、Cong Chen、Xia Hao、Lili Wu、Jingquan Zhang、Dewei Zhao

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College of Materials Science and Engineering & Institute of New Energy and Low-Carbon Technology,Sichuan University,Engineering Research Center of Alternative Energy Materials & Devices,Ministry of Education,Chengdu 610065,China

School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology,Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China,Soochow University,Suzhou 215006,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key Research and Development Program of ChinaFundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central UniversitiesScience and Technology Program of Sichuan ProvinceNatural Science Foundation of Sichuan ProvinceEngineering Featured Team Fund of Sichuan University

62104163621741122019YFE01200002021SCU12057YJ2019552020JDJQ00302022NSFSC11832020SCUNG102

2023

10.1002/eem2.12465

能源与环境材料(英文)

能源与环境材料(英文)

CSCD
ISSN：
年,卷(期)：2023.6(6)
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