Issue 38, 2021, Issue in Progress

Comparison of surface-passivation ability of the BAI salt and its induced 2D perovskite for high-performance inverted perovskite solar cells

Abstract

Organic–inorganic lead halide perovskite solar cells have shown a rapid increase in power conversion efficiency (PCE) in the past decade. However, their performance still suffers from trap-assisted decline due to defects at the surface and grain boundaries in the polycrystalline active layer. In this study, a thin BAI layer was formed on the CH3NH3PbI3 surface, which was then transformed into either a two-dimensional (2D) perovskite layer (BA2PbI4) or the organic salt itself by controlling the post-annealing process. A variety of characterization results show that the 2D perovskites could effectively reduce the trap-assisted charge recombination and increase the device stability. Therefore, a remarkably enhanced PCE of 20.6% was achieved in the modified inverted perovskite solar cells.

Graphical abstract: Comparison of surface-passivation ability of the BAI salt and its induced 2D perovskite for high-performance inverted perovskite solar cells

Article information

Article type
Paper
Submitted
22 Mar 2021
Accepted
16 Jun 2021
First published
01 Jul 2021
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2021,11, 23249-23258

Comparison of surface-passivation ability of the BAI salt and its induced 2D perovskite for high-performance inverted perovskite solar cells

H. Zhang, S. Wang, Y. Hou, F. Zhang, Y. Hao, J. Song and J. Qu, RSC Adv., 2021, 11, 23249 DOI: 10.1039/D1RA02260A

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