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Updated: Nov 24, 2025
Solution-Processed "Silver-Bismuth-Iodine" Ternary Thin Films for Lead-Free Photovoltaic Absorbers
Published on: September 27, 2018
A lead-free bismuth iodide organic-inorganic ferroelectric semiconductor
Yu-Hua Liu1, Hang Peng1, Wei-Qiang Liao1
1College of Chemistry, Nanchang University, Nanchang 330031, People's Republic of China. liaowq@ncu.edu.cn.
Abstract:
Organic-inorganic metal halide ferroelectric semiconductors are mainly lead halide ones, suffering from the presence of toxic lead. Herein, we report a lead-free bismuth iodide ferroelectric semiconductor [1,4-butanediammonium]BiI5, showing a high Curie temperature of 365 K and a small band gap of 1.95 eV, smaller than those of most lead halide counterparts.
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