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A simple method for phase control in two-dimensional perovskite solar cells.

Authors :
Ma, Chunqing
Lo, Ming-Fai
Lee, Chun-Sing
Source :
Journal of Materials Chemistry A; 10/21/2018, Vol. 6 Issue 39, p18871-18876, 6p
Publication Year :
2018

Abstract

Two-dimensional (2D) UGRAPHIC DISPLAY="INLINE" ID="UGT1" SRC="UGT1"/ perovskites with n = 4 have attracted much attention recently and the low-n (e.g. n = 1) phases in these 2D perovskites have been found to act as carrier traps, leading to decreased performance. In this work, we demonstrate a simple method to suppress the formation of low-n phases by using dimethyl sulfoxide (DMSO) as a co-solvent. The present 2D perovskites with alternating cations in the interlayer space (ACI) exhibit enhanced carrier lifetime and charge transport by suppressing low-n phases. The optimized 2D ACI-based perovskite solar cell shows a PCE of 12.8%, which is also the highest efficiency for ACI-based perovskite solar cells, and is almost 3 times higher than that of the non-DMSO treated devices. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20507488
Volume :
6
Issue :
39
Database :
Complementary Index
Journal :
Journal of Materials Chemistry A
Publication Type :
Academic Journal
Accession number :
132247972
Full Text :
https://doi.org/10.1039/c8ta06976j