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Organolead Halide-Based Coordination Polymers: Intrinsic Stability and Photophysical Applications
Chen Sun1, Ruonan Xi1, Honghan Fei1
1School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, P. R. China.
Accounts of Chemical Research
|January 31, 2023
Summary
Researchers developed intrinsically stable organolead halide coordination polymers using anionic organic linkers. These materials exhibit excellent photophysical properties and stability, enabling applications in photocatalysis and luminescence.
Area of Science:
- Materials Science
- Chemistry
- Photovoltaics
- Coordination Polymers
Background:
- Organolead halide-based photovoltaics offer high efficiency but suffer from instability in protic environments.
- Current stabilization methods like encapsulation can hinder performance and introduce interface issues.
- Developing intrinsically stable organometal halide hybrids is crucial for optoelectronic applications.
Purpose of the Study:
- To describe recent progress in synthesizing organolead halide-based coordination polymers.
- To propose a strategy for enhancing the intrinsic stability of organometal halide crystalline materials.
- To explore their applications in photoactive devices.
Main Methods:
- Synthesis of organolead halide coordination polymers using coordinating anionic organic linkers (e.g., organocarboxylates).
- Investigation of structural motifs, including low-dimensional (0D, 1D) to high-dimensional inorganic sublattices.
- Experimental studies and theoretical calculations to assess stability and photophysical properties.
- Characterization of porous frameworks and their performance in photocatalytic water splitting.
Main Results:
- Organolead halide coordination polymers demonstrate enhanced intrinsic stability, enduring harsh chemical environments (wide pH range, boiling water).
- Chloride/bromide-based polymers exhibit air-stable, broadband self-trapped emission with high quantum yields (35-72%).
- Porous frameworks function as metal-organic frameworks (MOFs) with superior light-harvesting and carrier-transport properties.
- A layered organolead iodide coordination polymer achieved photocatalytic water splitting without sacrificial agents.
Conclusions:
- Anionic organic linkers are effective in creating intrinsically stable organolead halide coordination polymers with tunable photophysical properties.
- These materials offer a promising alternative to conventional perovskites for various photoactive applications.
- Coordination chemistry plays a vital role in discovering novel, stable organometal halide materials for expanded optoelectronic uses.
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