Powder Methodology—An Effective Way to Suppress Sn 2+ Oxidation in Narrow Bandgap Pb‐Sn Perovskite

Year: 2025

Type: article

Abstract: Lead–tin halide perovskites are of significant merits due to their suitability for tandem solar cell fabrication and for lowering the environmental impact. However, the substantial disparity in the crystallization of tin‐ and lead‐based perovskites, coupled with the tendency of Sn 2+ to oxidize rapidly, poses hurdles and rise in defect concentration. Here, the study proposes a cost‐effective and facile route to synthesize lead–tin halide perovskite microcrystals. The perovskite formulation and the thin films deposited from lead–tin halide perovskite microcrystal exhibit an improved stability of Sn 2+ against environmental humidity conditions compared to their precursor‐based counterparts. The device fabricated with FAPb 0.5 Sn 0.5 I 3 microcrystal measures a power conversion efficiency of 18.55% with an open‐circuit voltage of 800 mV, coupled with low‐cost precursors and lead mitigation protocols.

Source: Small Methods

DOI: 10.1002/smtd.202500522

Authors: Mahdi Gassara, Haixuan Yu, Ashish Kulkarni, Mingkui Wang, Samrana Kazim, Shahzada Ahmad

Institutions: Basque Center for Materials, Applications and Nanostructures, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, University of Cologne, Ikerbasque, Material Physics Center

Language: English

Topic: Perovskite Materials and Applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: bronze

Funders: European Commission, Deutscher Akademischer Austauschdienst, National Natural Science Foundation of China, Ministerio de Ciencia e Innovación, Horizon 2020 Framework Programme, Agencia Estatal de Investigación, H2020 European Research Council

OpenAlex ID: W4410035843