Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/121197
Citations
Scopus Web of Science® Altmetric
?
?
Type: Journal article
Title: Triggering the passivation effect of potassium doping in mixed-cation mixed-halide perovskite by light illumination
Author: Zheng, F.
Chen, W.
Bu, T.
Ghiggino, K.P.
Huang, F.
Cheng, Y.
Tapping, P.
Kee, T.W.
Jia, B.
Wen, X.
Citation: Advanced Energy Materials, 2019; 9(24):1901016-1-1901016-11
Publisher: Wiley
Issue Date: 2019
ISSN: 1614-6832
1614-6840
Statement of
Responsibility: 
Fei Zheng, Weijian Chen, Tongle Bu, Kenneth P. Ghiggino, Fuzhi Huang, Yibing Cheng, Patrick Tapping, Tak W. Kee, Baohua Jia and Xiaoming Wen
Abstract: Potassium (K⁺) doping has been recently discovered as an effective route to suppress hysteresis and improve the performance stability of perovskite solar cells. However, the mechanism of these K⁺ doping effects is still under debate, and rationalization of the improved performance in these perovskites is needed. Herein, the photoluminescence (PL) properties and device performance of mixed‐cation mixed‐halide perovskite are dynamically monitored with and without K⁺ doping under bias light illumination via a confocal fluorescence microscope, together with ultrafast transient absorption as well as time‐dependent and time‐resolved PL measurements. It is demonstrated that illumination is essential to trigger the passivation effect of K⁺ by forming KBr‐like compounds, leading to the elimination of interface trapping defects and suppression of mobile ion migration, thus resulting in improved power conversion efficiency and negligible current–voltage hysteresis of solar cells. This work provides novel insight into the hysteresis suppression upon K⁺ doping and highlights the significance of light illumination when using this protocol.
Keywords: Light soaking; passivation; perovskites; photoluminescence; potassium (K⁺) doping
Rights: © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
DOI: 10.1002/aenm.201901016
Grant ID: http://purl.org/au-research/grants/arc/IC180100005
http://purl.org/au-research/grants/arc/CE170100026
Appears in Collections:Aurora harvest 8
Chemical Engineering publications

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.