A lead-free bismuth iodide organic-inorganic ferroelectric semiconductor.
Yu‐Hua Liu, Hang Peng, Weiqiang Liao
Dec 21, 2020
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Chemical communications
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Key Takeaway Key Takeaway: The lead-free bismuth iodide ferroelectric semiconductor [1,4-butanediammonium]BiI5 shows a high Curie temperature of 365 K and a small band gap of 1.95 eV, offering a promising alternative to toxic lead halide counterparts.
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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