Issue 24, 2024

Regulating the crystallization of mixed-halide perovskites by cation alloying for perovskite–organic tandem solar cells

Abstract

Halide segregation and energy loss pose significant challenges for wide-bandgap perovskite solar cells, impairing their photovoltage and device stability. These issues are often exacerbated by inferior film quality and inhomogeneous halide distribution due to unbalanced crystallization processes. To address these challenges, we developed a novel strategy using a cation alloy that not only tailors the lattice properties and crystallization but also effectively passivates the defects. This approach enables homogeneous halide distribution and substantially reduced defect density. These improvements have led to a remarkable power conversion efficiency (PCE) of 19.50% with a record open-circuit voltage of 1.35 V for 1.79 eV perovskite solar cells, approaching ∼90% of its S–Q limit. Furthermore, the champion device could maintain 93% of its initial efficiency after operating at its maximum power point for 500 hours. By integrating these perovskite devices into a monolithic perovskite–organic tandem solar cell (PO-TSC) as the wide-bandgap subcell, we demonstrated a high PCE of 25.54%. This efficiency is among the highest values reported for PO-TSCs, presenting a significant step forward in these promising tandem cells.

Graphical abstract: Regulating the crystallization of mixed-halide perovskites by cation alloying for perovskite–organic tandem solar cells

Supplementary files

Transparent peer review

To support increased transparency, we offer authors the option to publish the peer review history alongside their article.

View this article’s peer review history

Article information

Article type
Paper
Submitted
11 Jul 2024
Accepted
05 Nov 2024
First published
06 Nov 2024

Energy Environ. Sci., 2024,17, 9580-9589

Regulating the crystallization of mixed-halide perovskites by cation alloying for perovskite–organic tandem solar cells

M. Chen, Y. Li, Z. Zeng, M. Liu, T. Du, X. Huang, L. Bi, J. Wang, W. Jiang, Y. An, S. Tsang, J. Yin, S. Wu and A. K.-Y. Jen, Energy Environ. Sci., 2024, 17, 9580 DOI: 10.1039/D4EE03045A

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