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Updated: May 20, 2025
Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
Published on: December 29, 2016
A Halobismuthate Hybrid Characteristic of a T-Shaped Cation: Structure, Band Gap, Photocurrent Response, and
Jun Li1,2, Shu-Yue Xie1, Jiu-Jiang Dong1
1College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China.
Abstract:
Seeking new types of halobismuthate hybrids and exploring their physicochemical applications remain very attractive, yet full of challenges. Herein, we successfully fabricate and structurally characterize a novel halobismuthate with abundant weak interactions, namely, [MCP]3Cs2Bi2I6Cl2 (1, HMCP+ = 1-methyl-4-(carboxyl)pyridinium), which features the discrete [BiI5.45Cl0.55]3- anions that are charge-balanced by Cs+ ions and T-shaped [Bi(MCP)3I0.55Cl1.45]+ cations. UV-vis diffuse reflection studies show that compound 1 possesses the semiconducting property, with an optical band gap of 2.35 eV. More prominently, it exhibits the excellent photoelectric switching ability, whose photocurrent density (2.64 μA·cm-2) greatly outperforms or compares well with those of many high-performance metal halide analogues. In addition, compound 1 also displays wavelength-dependent photocurrent response behavior. Further theoretical analyses reveal that its valence band maximum and conduction band minimum are largely from the organic moiety and halogen, which may offer new guidance for the design and synthesis of newer halobismuthates with unique structures and desirable properties.
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