DataVXAdvanced Optical MaterialsPaper
journal article·2023-05Open access

Reversible Thermochromic Bismuth Iodide Enabled by Self‐Adjustment

Rui Wen, Yanyan Wang, Xinjie Ma, Yikun Yan, Qi Ma, Jinpeng Gao, Huaming Sun, Hao Huang, Ziwei Gao

Advanced Optical Materials· Volume 11· Issue 9
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Abstract

Abstract Light‐harvesting materials with dynamical management of light transmittance hold great promise in smart photovoltaics (PV). Here, a novel organic–inorganic halide, MVBi2I8 (MV = methyl viologen cation), exhibiting reversible thermochromism and constant bandgap of ≈1.65 eV over a wide temperature range of 77–453 K, is presented as a candidate. The compound consists of 0D (Bi4I16)4– clusters and MV2+ cations. And the adjacent (Bi4I16)4– clusters are in touch with each other, forming a 3D interaction for the inorganic part. The experimental and theoretical studies reveal that the ionic and covalent interactions in the crystal undergo a self‐adjusting process in response to temperature changes. The self‐adjustment and electron transfer between inorganic clusters and organic cations enable excellent reversible thermochromism and constant narrow bandgaps over a wide temperature range, which is expected for smart PV windows integrated with information displays and potentially other technologies.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Crystal Structures and Properties · Polyoxometalates: Synthesis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Applied Surface and Colloid Chemistry MOE Xi'an Key Laboratory of Organometallic Material Chemistry School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710119 P. R. China

Department of Chemistry University of Michigan Ann Arbor MI 48109 USA

Department of Microsystems University of South‐Eastern Norway Borre 3184 Norway

School of Chemistry & Chemical Engineering Xinjiang Normal University Urumqi 830054 P. R. China

Research Institute of Comprehensive Energy Industry Technology College of Chemistry & Chemical Engineering Yan'an University Yan'an Shaanxi 716000 P. R. China

Funding

National Natural Science Foundation of China · Key Research and Development Projects of Shaanxi Province · Higher Education Discipline Innovation Project · Fundamental Research Funds for the Central Universities

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