CH3NH3PbI3−xBrx perovskite solar cells via spray assisted two-step deposition: Impact of bromide on stability and cell performance

Gaoda Chai; Shiqiang Luo; Hang Zhou; Walid A. Daoud

doi:10.1016/j.matdes.2017.04.010

Author(s)

Gaoda Chai
Shiqiang Luo
Hang Zhou
Walid A. Daoud

Related Research Unit(s)

School of Energy and Environment

Detail(s)

Original language	English
Pages (from-to)	222-229
Journal / Publication	Materials and Design
Volume	125
Publication status	Published - 5 Jul 2017

Link(s)

DOI	DOI https://doi.org/10.1016/j.matdes.2017.04.010 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85017654307&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(d86f6223-c4fa-4a16-9cc0-6bc7b6b24ed1).html

Abstract

Fully converting the lead salt to perovskite is crucial for the performance of perovskite solar cells via the two-step deposition method. In this study, full conversion of PbI₂ to perovskite is achieved via a spray assisted two-step deposition method with excess CH₃NH₃I sprayed onto the PbI₂ layer. The influence of adding CH₃NH₃Br in the PbI₂ solution in the first step on the resulting solar cells is investigated. The perovskite solar cells show significant increase in power conversion efficiency after one-night storage where a process of Br ion diffusion from Br-rich to I-rich regions is proposed. The study provides an alternative approach for incorporating Br and may help explaining the contradiction of reported conversion efficiency trends.

Research Area(s)

CH3NH3PbI3 − xBrx, Ion diffusion, Perovskite solar cells, Spray deposition, Two-step deposition

SDG 7 - Affordable and Clean Energy

Citation Format(s)

[ RIS ] [ BibTeX ]

CH₃NH₃PbI_3−xBr_x perovskite solar cells via spray assisted two-step deposition: Impact of bromide on stability and cell performance. / Chai, Gaoda; Luo, Shiqiang; Zhou, Hang et al.
In: Materials and Design, Vol. 125, 05.07.2017, p. 222-229.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Chai, G, Luo, S, Zhou, H & Daoud, WA 2017, 'CH₃NH₃PbI_3−xBr_x perovskite solar cells via spray assisted two-step deposition: Impact of bromide on stability and cell performance', Materials and Design, vol. 125, pp. 222-229. https://doi.org/10.1016/j.matdes.2017.04.010

Chai, G., Luo, S., Zhou, H., & Daoud, W. A. (2017). CH₃NH₃PbI_3−xBr_x perovskite solar cells via spray assisted two-step deposition: Impact of bromide on stability and cell performance. Materials and Design, 125, 222-229. https://doi.org/10.1016/j.matdes.2017.04.010

Chai G, Luo S, Zhou H, Daoud WA. CH₃NH₃PbI_3−xBr_x perovskite solar cells via spray assisted two-step deposition: Impact of bromide on stability and cell performance. Materials and Design. 2017 Jul 5;125:222-229. doi: 10.1016/j.matdes.2017.04.010

Chai, Gaoda ; Luo, Shiqiang ; Zhou, Hang et al. / CH₃NH₃PbI_3−xBr_x perovskite solar cells via spray assisted two-step deposition : Impact of bromide on stability and cell performance. In: Materials and Design. 2017 ; Vol. 125. pp. 222-229.

CH3NH3PbI3−xBrx perovskite solar cells via spray assisted two-step deposition : Impact of bromide on stability and cell performance