中文版 | English
Title

Unraveling Passivation Mechanism of Imidazolium-Based Ionic Liquids on Inorganic Perovskite to Achieve Near-Record-Efficiency CsPbI2Br Solar Cells

Author
Corresponding AuthorLiu,Zhike; Liu,Shengzhong
Publication Years
2022-12-01
DOI
Source Title
ISSN
2311-6706
EISSN
2150-5551
Volume14Issue:1
Abstract

The application of ionic liquids in perovskite has attracted wide-spread attention for its astounding performance improvement of perovskite solar cells (PSCs). However, the detailed mechanisms behind the improvement remain mysterious. Herein, a series of imidazolium-based ionic liquids (IILs) with different cations and anions is systematically investigated to elucidate the passivation mechanism of IILs on inorganic perovskites. It is found that IILs display the following advantages: (1) They form ionic bonds with Cs+ and Pb2+ cations on the surface and at the grain boundaries of perovskite films, which could effectively heal/reduce the Cs+/I- vacancies and Pb-related defects; (2) They serve as a bridge between the perovskite and the hole-transport-layer for effective charge extraction and transfer; and (3) They increase the hydrophobicity of the perovskite surface to further improve the stability of the CsPbI2Br PSCs. The combination of the above effects results in suppressed non-radiative recombination loss in CsPbI2Br PSCs and an impressive power conversion efficiency of 17.02%. Additionally, the CsPbI2Br PSCs with IILs surface modification exhibited improved ambient and light illumination stability. Our results provide guidance for an indepth understanding of the passivation mechanism of IILs in inorganic perovskites.

Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
Others
Funding Project
National Natural Science Foundation of China[62074095] ; National Key Research and Development Program of China[2016YFA0202403] ; Fundamental Research Funds for the Central Universities[GK202002001] ; 111 Project[B21005] ; DNL Cooperation Fund CAS[DNL180311]
WOS Research Area
Science & Technology - Other Topics ; Materials Science ; Physics
WOS Subject
Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS Accession No
WOS:000725606600003
Publisher
ESI Research Field
MATERIALS SCIENCE
Scopus EID
2-s2.0-85120736599
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttps://kc.sustech.edu.cn/handle/2SGJ60CL/257840
DepartmentDepartment of Materials Science and Engineering
Affiliation
1.Key Laboratory of Applied Surface and Colloid Chemistry,Ministry of Education,Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology,School of Materials Science and Engineering,Shaanxi Normal University,Xi’an,710119,China
2.Dalian Institute of Chemical Physics,iChEM,University of Chinese Academy of Sciences,Dalian National Laboratory for Clean Energy,Chinese Academy of Sciences,Dalian,116023,China
3.Ministry of Education Key Laboratory of Interface Science and Engineering in Advanced Materials,Research Center of Advanced Materials Science and Technology,Taiyuan University of Technology,Taiyuan,030024,China
4.Institute of Functional Nano & Soft Materials,Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices,Joint International Research Laboratory of Carbon-Based Functional Materials and Devices,Soochow University,Suzhou,215123,China
5.Department of Materials Science and Engineering and Shenzhen Engineering Research and Development Center for Flexible Solar Cells,Southern University of Science and Technology,Shenzhen,518055,China
6.State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources,North China Electric Power University,Beijing,102206,China
Recommended Citation
GB/T 7714
Xu,Jie,Cui,Jian,Yang,Shaomin,et al. Unraveling Passivation Mechanism of Imidazolium-Based Ionic Liquids on Inorganic Perovskite to Achieve Near-Record-Efficiency CsPbI2Br Solar Cells[J]. NANO-MICRO LETTERS,2022,14(1).
APA
Xu,Jie.,Cui,Jian.,Yang,Shaomin.,Han,Yu.,Guo,Xi.,...&Liu,Shengzhong.(2022).Unraveling Passivation Mechanism of Imidazolium-Based Ionic Liquids on Inorganic Perovskite to Achieve Near-Record-Efficiency CsPbI2Br Solar Cells.NANO-MICRO LETTERS,14(1).
MLA
Xu,Jie,et al."Unraveling Passivation Mechanism of Imidazolium-Based Ionic Liquids on Inorganic Perovskite to Achieve Near-Record-Efficiency CsPbI2Br Solar Cells".NANO-MICRO LETTERS 14.1(2022).
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