Issue 21, 2023

Favorable morphology and compositional distribution enable efficient and stable quasi-2D Dion–Jacobson perovskite solar cells

Abstract

Two-dimensional (2D) Dion–Jacobson (DJ) halide perovskites are being intensively investigated owing to their superior stability compared with 2D Ruddlesden–Popper (RP) perovskites. Although various organic cations have been reported to form 2D DJ perovskites, their structure–property relationships are rarely studied. In this work, two novel organic cations MDAN (4,4′-methylenedianilinium) and EDAN (4,4′-ethylenedianilinium) were applied to form quasi-2D DJ perovskites with nominal layer number n = 6. An (EDAN)MA5Pb6I19:0.15MACl based inverted solar cell achieved a power conversion efficiency (PCE) of 13.2%, outperforms the 9.6% PCE achieved by a (MDAN)MA5Pb6I19:0.15MACl based device. The formation of quasi-2D perovskites with high-n values was observed for both compounds, while the superior performance is demonstrated by the (EDAN)MA5Pb6I19:0.15MACl based device, which could be attributed to its better film morphology and lower defect density. Intriguingly, we found that EDAN based quasi-2D perovskites were evenly distributed in the film while MDAN based quasi-2D perovskites concentrated near the film surface, accounting for an unfavorable electronic band alignment of the latter. Both (MDAN/EDAN)MA5Pb6I19:0.15MACl films remained unchanged in air with 50% relative humidity for 20 days. This work not only presents a decent device performance, but also explores understanding of tuning morphology towards high-efficiency quasi-2D Dion–Jacobson perovskite solar cells.

Graphical abstract: Favorable morphology and compositional distribution enable efficient and stable quasi-2D Dion–Jacobson perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
22 Dec. 2022
Accepted
25 Apr. 2023
First published
27 Apr. 2023

J. Mater. Chem. A, 2023,11, 11377-11387

Favorable morphology and compositional distribution enable efficient and stable quasi-2D Dion–Jacobson perovskite solar cells

C. Zhou, Y. Han, L. Cheng, R. Ma, F. Wang, S. Weng, G. Yu, F. Lin, K. Zhou, H. Hu, X. Liang, Y. Wang, H. Lin and G. Li, J. Mater. Chem. A, 2023, 11, 11377 DOI: 10.1039/D2TA09940C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements