Tunable bimodal luminescent perovskite nanocrystal composites and methods of making the same
By confined in-situ crystallization of mesoporous materials and subsequent ion exchange, a core-shell perovskite nanocrystalline composite material was constructed. This solved the problem of luminescence efficiency decay caused by structural phase transition in existing technologies, and enabled reversible switching and spectral tuning of dual-mode luminescence, thereby improving the thermal response performance and preparation efficiency of the material.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 河南省科学院材料基因工程研究所
- Filing Date
- 2026-04-10
- Publication Date
- 2026-07-17
AI Technical Summary
Existing intelligent photoresponse systems based on metal halide perovskite nanocrystals suffer from problems such as luminescence efficiency decay and ion migration caused by structural phase transitions in thermo-photoresponse materials, making it difficult to achieve continuous and gradual spectral tuning. Furthermore, traditional trial-and-error methods are inefficient and make it difficult to select material compositions that meet specific dual-mode luminescence requirements.
By employing a method of confined in-situ crystallization of mesoporous materials followed by ion exchange, a "garnet-like" core-shell perovskite nanocrystalline composite material was constructed. By adjusting the composition and controlling the crystallization kinetics, a dual-mode luminescent material with a core-shell structure was formed. Furthermore, a machine learning model was used to predict the emission color, enabling precise adjustment of the ratio of core-shell luminescence intensity and the decay kinetics.
It achieves reversible switching of dual-mode luminescence through physical mechanisms without changing the crystal structure, significantly improving the thermal response sensitivity and dynamic thermoluminescence color-changing performance of the material, simplifying the preparation process, improving the stability and controllability of the material, and enabling multiple dual-color emission covering the entire visible light band.
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Figure CN122405263A_ABST