Work

Surface Passivation of Sn-Based Wide Band Gap Perovskite Solar Cells Using Functional Molecules

Year: 2025

Type: conference-paper

Abstract: Surface passivation with multifunctional molecules is a powerful approach to enhancing the performance and stability of perovskite solar cells (PSCs). This study reports the fabrication of wide-bandgap tin-based perovskite solar cells (WB-Sn-PSCs) with a bandgap of 1.68 eV, achieving a power conversion efficiency of 11.14%. Molecular surface passivation using 4-Fluorobenzohydrazide (F-BHZ) significantly improves device performance and stability by engineering both the surface and bulk properties of the WB-Sn-HP film. F-BHZ treatment strengthens electrostatic potential and molecular interactions with functional groups, mitigating surface defects and suppressing Sn2⁺ oxidation, as confirmed by theoretical calculations. This work highlights the potential of advanced chemical engineering strategies to optimize non-toxic, lead-free perovskite solar cells, advancing their competitiveness as environmentally friendly photovoltaic solutions.

Source: Conference record of the IEEE Photovoltaic Specialists Conference

DOI: 10.1109/pvsc59419.2025.11133091

Authors: Dhruba B. Khadka, Masatoshi Yanagida, Roji Sahara, Yasuhiro Shirai

Institution: National Institute for Materials Science

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: green

Funder: Hitachi