Semi-transparent perovskite solar cells: unveiling the trade-off between transparency and efficiency

Funding Number

91633301

Author's Department

Physics Department

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https://pubs.rsc.org/en/content/articlelanding/2018/ta/c8ta07318j#!divAbstract

All Authors

Ligang Yuan; Zhaowei Wang; Ruomeng Duan; Peng Huang; Kaicheng Zhang; Qiaoyun Chen; Nageh K. Allam; Yi Zhou; Bo Song; Yongfang Li

Document Type

Research Article

Publication Title

Journal of Materials Chemistry A

Publication Date

1-1-2018

doi

10.1039/c8ta07318j

Abstract

Semi-transparent perovskite solar cells (Pero-SCs) are realized by tuning the band gap of the perovskite to resolve the trade-off between the transparency and efficiency of the photo-absorber. We synthesized wide-bandgap MAPbI3-xBrx perovskite, and the transparency and efficiency of the corresponding semi-transparent Pero-SCs were investigated systematically by varying the I:Br ratio and thickness of the perovskite film. Increasing Br content widened the bandgap of perovskite (i.e., blue shift of the absorption edge), and led to an increase in the average visible transmittance (AVT). This strategy allowed for high AVTs, and concomitantly achieved high power conversion efficiencies. Meanwhile, increasing the Br content could facilitate formation of perovskite films with large grains that were highly crystallized. Compared with the narrow-bandgap perovskite, the wide-bandgap perovskite showed advantages for obtaining semi-transparent Pero-SCs with thick perovskite films (>200 nm) and high (20%) transparency.

First Page

19696

Last Page

19702

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