Halogen anion pre-homogenization of sequentially deposited wide bandgap perovskites for commercial textured perovskite/silicon tandem solar cells

Abstract

An evaporation–solution sequentially deposited wide bandgap perovskite has been widely applied to fabricate efficient, commercial textured perovskite/silicon tandem solar cells. However, current works generally widen the bandgap by incorporating more bromine into organic salt solutions, which poses challenges for further broadening the bandgap of perovskite thin films and is also prone to inhomogeneous crystallization and component distribution. Here, a halogen anion pre-homogenizing (Pre-H) strategy is proposed by a pre-forming homogeneous inorganic halide precursor to narrow the nucleation rate disparity between the iodide and bromide components. This approach yields improved longitudinal crystallinity, enhanced compositional uniformity, and optimized bottom interfacial contact. In addition, augmenting the proportion of PbBr2 in the precursor template enables bandgap expansion of the Pre-H perovskite up to 1.78 eV without phase segregation. Consequently, single-junction wide bandgap perovskite solar cells (1.68 eV) utilizing the Pre-H strategy achieve an impressive efficiency of 22.21%. The monolithic commercial textured perovskite/silicon tandem solar cell (1.05 cm2) attains an efficiency of up to 30.83%, featuring an open-circuit voltage (VOC) of 1.945 V, the highest VOC for perovskite/silicon tandem solar cells based on the sequential deposited perovskite to date. When scaled to 10.5 cm × 10.5 cm substrates, the encapsulated tandem device achieves a power conversion efficiency of 27.1% (certified as 26.6%, with an aperture area of 64.64 cm2).

Graphical abstract: Halogen anion pre-homogenization of sequentially deposited wide bandgap perovskites for commercial textured perovskite/silicon tandem solar cells

Supplementary files

Article information

Article type
Paper
Submitted
28 Jan 2025
Accepted
22 Apr 2025
First published
08 May 2025

Energy Environ. Sci., 2025, Advance Article

Halogen anion pre-homogenization of sequentially deposited wide bandgap perovskites for commercial textured perovskite/silicon tandem solar cells

B. Shi, P. Liu, Z. Sunli, W. Han, C. Sun, Y. Liu, Y. Luo, J. Si, P. Du, F. Zhang, M. Yang, Y. He, B. He, D. Zhang, X. Du, X. Xu, R. Xia, X. Zhang, Y. Chen, J. Gao, Y. Zhao and X. Zhang, Energy Environ. Sci., 2025, Advance Article , DOI: 10.1039/D5EE00563A

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