Comprehensive Analysis of Temperature-Dependent Photoluminescence in Silica-Encapsulated CsPbBr3 and CsPbI3 Perovskite Nanocrystals
The temperature-dependent photoluminescence of CsPbBr<sub>3</sub>/SiO<sub>2</sub> and CsPbI<sub>3</sub>/SiO<sub>2</sub> nanocrystals was investigated to understand the thermal stability of SiO<sub>2</sub> encapsulation. At increased temperature, intensity quenching, linewidth broadening, energy level shift, and decay dynamics were evaluated as quantified parameters. Comprehensive analysis of these parameters supports that CsPbI<sub>3</sub>/SiO<sub>2</sub> nanocrystals show a stronger interaction with phonons compared with CsPbBr<sub>3</sub>/SiO<sub>2</sub> nanocrystals. Despite SiO<sub>2</sub> encapsulation, we conclude that trapping states are still present and the degree of localization can be characterized in terms of short-lived decay time and thermal activation energy.
Authors
- Ga Eul Choi
- Suck Won Hong (ORCID: https://orcid.org/0000-0001-7291-1020)
- Jihoon Kyhm (ORCID: https://orcid.org/0000-0001-5897-5829)
- Minju Kim (ORCID: https://orcid.org/0000-0003-3160-0220)
- Ming Mei
- Sang Hyuk Park
- Songyi Lee
- Wei Chen
- Robert A. Taylor
Institutions
- University of Oxford (GB)
- Shenzhen Technology University (CN)
- Imperial College London (GB)
- Pusan National University (KR)
- Pukyong National University (KR)
Publication Details
- Journal
- Nanomaterials
- Published
- 2026-01-05
- DOI
- https://doi.org/10.3390/nano16010076
- Citations
- 1
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 21.93