Synthesis and optical characterization of lead-free phenylenediammonium bismuth halide perovskites: a long charge carrier lifetime in phenylenediammonium bismuth iodide

Journal article

Siddique, Z, Payne, J. L, Mica, N, Cordes, D. B, Slawin, A. M. Z, Samuel,I. D. W, Iqbal, A, Irvine, J. T. S and Sajjad, T. (2023). Synthesis and optical characterization of lead-free phenylenediammonium bismuth halide perovskites: a long charge carrier lifetime in phenylenediammonium bismuth iodide. Journal of Materials Chemistry C. 11 (1), pp. 223-234. https://doi.org/10.1039/d2tc02601e
AuthorsSiddique, Z, Payne, J. L, Mica, N, Cordes, D. B, Slawin, A. M. Z, Samuel,I. D. W, Iqbal, A, Irvine, J. T. S and Sajjad, T.
Abstract

Toxicity and regulatory concerns over the use of (CH3NH3)PbI3 in photovoltaic devices have resulted in significant interest in lead-free, organic-inorganic metal halides with excellent light absorbing properties and stability. Here we report the synthesis of three new lead-free bismuth halides which accommodate the symmetric conjugated p-phenylenediammonium cation (PPD = (H3NC6H4NH3)2+) in the structures. These are (PPD)BiI5, (PPD)[BiBr4]2·2H2O (2) and (PPD)2BiCl7·H2O. We also synthesized β-(PPD)2Bi2I10. The band gap of the iodide, β (PPD)2Bi2I10 (1.83 eV) is lower than that of the bromide, (PPD)[BiBr4]2·2H2O ( 2.64 eV) and chloride, (PPD)2BiCl7·H2O (2.93 eV). Photophysical studies show that β (PPD)2Bi2I10 has the longest average charge carrier lifetime (>1 us) of the materials studied here, of the same order of magnitude as that of (CH3NH3)PbI3 and has a low band gap. This suggests that β (PPD)2Bi2I10 may be a promising candidate for use in lead-free photovoltaic devices.

Keywords(H3NC6H4NH3)2+ cation; aromatic; hybrid perovskite; 1D; time resolved photoluminescence; 0D; single crystal; photovoltaics
Year2023
JournalJournal of Materials Chemistry C
Journal citation11 (1), pp. 223-234
PublisherRoyal Society of Chemistry (RSC)
ISSN2050-7534
Digital Object Identifier (DOI)https://doi.org/10.1039/d2tc02601e
Web address (URL)https://doi.org/10.1039/D2TC02601E
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Online2023
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Accepted28 Nov 2022
Deposited18 Jan 2023
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