Bykov AV, Shestimerova TA, Bykov MA, Osminkina LA, Kuznetsov AN, Gontcharenko VE, Shevelkov AV. Synthesis, Crystal, and Electronic Structure of (HpipeH(2))(2)[Sb(2)I(10)](I(2)), with I(2) Molecules Linking Sb(2)X(10) Dimers into a Polymeric Anion: A Strategy for Optimizing a Hybrid Compound's Band Gap.
Int J Mol Sci 2023;
24. [PMID:
36768523 DOI:
10.3390/ijms24032201]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/15/2023] [Accepted: 01/19/2023] [Indexed: 01/24/2023] Open
Abstract
In searching for a tool for optimizing the band gap of a hybrid compound capable of serving as a light-harvesting material in lead-free photovoltaics, we synthesized a new polyiodoantimonate (HpipeH2)2[Sb2I10](I2) and analyzed its crystal and electronic structure by application of X-ray crystal structure analysis, Raman and diffuse reflectance spectroscopies, and quantum chemical calculations. It was demonstrated that I2 molecules link Sb2I10 edge-sharing octahedra into zig-zag chains, whereas the organic cations link inorganic anionic chains into a 3D structure featuring a complex pattern of covalent bonds and non-covalent interactions. Overall, these features provide the background for forming the electronic structure with a narrow band gap of 1.41 eV, therefore being a versatile tool for optimizing the band gap of a potential light-harvesting hybrid compound.
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