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Residual solvent extraction via chemical displacement for efficient and stable perovskite solar cells
Min Fang1; Lei Tao1; Wen Wu1; Qi Wei2; Yingdong Xia,1; Ping Li1; Xueqin Ran1; Qi Zhong3; Guichuan Xing4; Lin Song2; Peter Müller-Buschbaum5,6; Hui Zhang1; Yonghua Chen1
2021-10
Source PublicationJournal of Energy Chemistry
ISSN2095-4956
Volume61Pages:8-14
Abstract

Solvent residue is inevitable to occur in solution processed thin films, but its influence on the thin film quality has not been identified and addressed to date. Methylammonium acetate (MAAc) ionic liquid has recently been realized as an environmentally friendly solvent for solution processed perovskites. The specific high viscosity, low vapor pressure and strong association with perovskite precursor of the MAAc solvent is a double-edged sword, which endowed an advantageously ambient air operational and anti-solvent free perovskite deposition, but the MAAc is likely to be retained within the film and bring in detrimental effects on device performance of the corresponding solar cells. Herein, we reported a novel route to eliminate the residual solvent via a facial hydrochloric acid (HCl) annealing post-treatment (HAAP). In particular, chemical displacement reaction between the incorporated HCl and residual MAAc can be initiated to form volatile MACl and HAc, efficiently extracting MAAc residue. In the meanwhile, the stimulated mass transport via downward penetration and upward escape can trigger secondary perovskite growth with enlarged grain size and smoothened surface, leading to reduced defect state and improved interfacial contact intimacy, and also partial chloride ions are able to enter the crystal lattice to stabilize perovskite phase structure. As a result, a champion efficiency up to 20.78% originating from enhanced V was achieved, and more than 96% of its initial efficiency can be maintained after 1000 h shelf-storage.

KeywordChemical Displacement Methylammonium Acetate Perovskite Post-treatment Solar Cells Solvent Residue
DOI10.1016/j.jechem.2021.02.017
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaChemistry ; Energy & Fuels ; Engineering
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Energy & Fuels ; Engineering, Chemical
WOS IDWOS:000661418900002
PublisherELSEVIER,RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
Scopus ID2-s2.0-85103030420
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Cited Times [WOS]:1   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorHui Zhang; Yonghua Chen
Affiliation1.Key Laboratory of Flexible Electronics (KLOFE) & Institution of Advanced Materials (IAM), Nanjing Tech University (Nanjing Tech), Nanjing, 211816, China
2.Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
3.Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, 310018, China
4.Institute of Joint Key Laboratory of the Applied Physics and Materials Engineering, University of Macau, Taipa, Avenida da Universidade, 999078, China
5.Lehrstuhl für Funktionelle Materialien, Physik Department, Technische Universität München, Garching, James-Franck-Str. 1, 85748, Germany
6.Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Garching, Lichtenbergstr. 1, 85748, Germany
Recommended Citation
GB/T 7714
Min Fang,Lei Tao,Wen Wu,et al. Residual solvent extraction via chemical displacement for efficient and stable perovskite solar cells[J]. Journal of Energy Chemistry,2021,61:8-14.
APA Min Fang,Lei Tao,Wen Wu,Qi Wei,Yingdong Xia,,Ping Li,Xueqin Ran,Qi Zhong,Guichuan Xing,Lin Song,Peter Müller-Buschbaum,Hui Zhang,&Yonghua Chen.(2021).Residual solvent extraction via chemical displacement for efficient and stable perovskite solar cells.Journal of Energy Chemistry,61,8-14.
MLA Min Fang,et al."Residual solvent extraction via chemical displacement for efficient and stable perovskite solar cells".Journal of Energy Chemistry 61(2021):8-14.
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