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Journal of Materials Chemistry C Vol - 5 Issue - 3

Journal of Materials Chemistry C Vol - 5 Issue - 2

Journal of Materials Chemistry C Vol -4

Journal of Materials Chemistry C Vol -3

Journal of Materials Chemistry C Vol -2

Journal of Materials Chemistry C Vol -1

Annealing-free perovskite films based on solvent engineering for efficient solar cells

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Jing Sun, Yue Fang, Xiang Wu, Yihui Yuan, Ningyi Ding, Jianning Lu, Yongting Zhang, Shuai Zhang, Wenhua
Copyright Year	2017
Abstract	One of the main issues for high-performance perovskite solar cells (PSCs) is the fabrication of high-quality perovskite films. However, a thermal annealing process is generally required for a high crystallinity film via a typical solution-based method, which may result in inhomogeneous nucleation, and is time-consuming. Herein, we investigate the effects of different solvents on the morphology and the crystallinity of perovskite films systematically and further develop a solvent-technique for uniform perovskite films without the need for annealing. N-Methyl-2-pyrrolidone (NMP) has been adopted as a high-boiling-point solvent and a complexant, combined with the commonly used N,N-dimethylformamide (DMF) or dimethylacetamide (DMAc), to improve the quality of perovskite films and enhance the corresponding device performance. PSCs fabricated from DMAc/NMP co-solvents using the post-annealing process show the best power conversion efficiency (PCE) of 17.38%, which is about 10% improvement compared to that of the device based on DMF/dimethyl sulfoxide (DMSO) or DMAc/DMSO co-solvents. Notably, 17.09% efficiency has been achieved even without any post-annealing process for the device based on DMAc/NMP co-solvents. However, only 3.81% efficiency can be obtained for the device based on DMAc/DMSO co-solvents under the same conditions. The observed phenomenon is mainly due to the fact that the NMP-included solvents can induce an instant crystallization once the anti-solvent drips on the films at room temperature (RT). Our study may provide a new approach to prepare high-quality perovskite films at RT, which would simplify the fabrication procedures and reduce the cost of efficient PSC manufacture.
Starting Page	842
Ending Page	847
Page Count	6
File Format	HTM / HTML PDF
ISSN	20507526
Volume Number	5
Issue Number	4
Journal	Journal of Materials Chemistry C
DOI	10.1039/c6tc04944c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	NMP PSCs DMSO PSC Perovskite Nucleic acid thermodynamics Crystal growth N-Methyl-2-pyrrolidone Solvent Dimethylformamide Dimethylacetamide Dimethyl sulfoxide AEC Regent III RT
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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