About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Glasses and Optical Materials: Challenges, Advances, and Applications
|
| Presentation Title |
Interfacial Mechanisms for Enhanced Photoluminescence in AgI-Doped CsPbBrI₂ Perovskite Quantum Dot Glass |
| Author(s) |
Yongmin Duan, Xingzhen Huang, Shugang Li, Wenyan Zheng, Junjie Zhang |
| On-Site Speaker (Planned) |
Yongmin Duan |
| Abstract Scope |
This work reports a significant enhancement in the photoluminescence quantum yield (PLQY) of red-emitting CsPbBrI₂ perovskite quantum dot (PQD) glass through AgI doping. The in-situ formation of Ag nanoparticles induces a localized surface plasmon resonance effect, which increases radiative recombination and promotes PQD crystallization. Density functional theory calculations reveal bandgap widening and reduced density of non-radiative states due to partial substitution of Pbē⁺ by Ag⁺ and suppression of halide vacancies. A maximum PLQY of 62.4% is achieved at 0.4 mol% AgI. Additionally, the optimized sample exhibits excellent thermal, water, and photostability, maintaining over 88% emission intensity after prolonged stress. These findings provide insight into the interfacial mechanisms enhancing PQD luminescence and demonstrate the potential of AgI-doped CsPbBrI₂ PQD glass for advanced optoelectronic applications. |