Strong Exciton Confinement Enabling Near-Unity Photoluminescence Quantum Efficiency in Hybrid Bimetallic Halides
Dongjie Liu1, Peipei Dang2, Yingsheng Wang1,3
1Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
Journal of the American Chemical Society
|February 27, 2026
Summary
Researchers developed new hybrid antimony halide materials using host-guest chemistry for efficient and stable luminescence. This strategy enables precise structural control, achieving high photoluminescence quantum efficiency over 98% and offering insights for advanced material design.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Solid-State Chemistry
Background:
- Developing efficient and stable zero-dimensional (0D) hybrid antimony halide materials is challenging due to limitations in traditional design methods.
- Existing trial-and-error approaches are time-consuming and inefficient for discovering novel materials with desired properties.
Purpose of the Study:
- To employ a host-guest chemistry strategy for designing novel hybrid antimony-based bimetallic halides (HABHs).
- To achieve controllable structural regulation and wide photoluminescence (PL) spectral modulation in these materials.
- To establish quantitative structure-property correlations for efficient material design.
Main Methods:
- Synthesis of HABHs with a general formula [A(L)6][BCln] using lanthanide/alkaline earth metals (A), Sb/In/Bi (B), and urea ligands (L).
- Structural characterization and analysis of steric effects from [A(L)6]2+/3+ clusters.
- Photophysical measurements including photoluminescence quantum efficiency (PLQY) and spectral analysis, supported by theoretical calculations.
Main Results:
- A series of HABHs were successfully designed, exhibiting controllable structural regulation and wide PL spectral modulation.
- Achieved high photoluminescence quantum efficiency (PLQY) exceeding 98% with strong exciton localization and minimal nonradiative recombination.
- Established a quantitative exponential relationship between PLQY and structural parameters, including polyhedron distortion and hydrogen bonding network integrity.
Conclusions:
- The host-guest chemistry strategy provides a viable route for designing efficient and structurally stable 0D hybrid antimony halides.
- Quantitative structure-property correlations were established, offering predictive insights for future material development.
- The developed materials demonstrate environmental stability and unique temperature-dependent PL behaviors, suggesting potential for diverse applications.
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