Journal
ADVANCED MATERIALS
Volume 29, Issue 36, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201701185
Keywords
aminated silica spheres; halide perovskite quantum dots; high stability; one-pot synthesis; random lasing
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Funding
- National Key Basic Research Program of China [2014CB931702]
- NSFC [51572128, 21403109]
- NSFC-RGC [5151101197]
- National Key Research and Development Program of China [2016YFB0401701]
- Ministry of Education Singapore through the Academic Research Fund [MOE2016-T2-1-054]
- Fundamental Research Funds for the Central Universities [30915012205, 30916015106]
- Natural Science Foundation of Jiangsu Province [BK20140769]
- PAPD of Jiangsu Higher Education Institutions
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Halide perovskite quantum dots (Pe-QDs) have been considered as outstanding candidates for photodetector, light-emitting diode, and lasing applications, but these perspectives are being impeded by the severe stability, including both chemical and optical degradations. This study reports on amino-mediated anchoring Pe-QDs onto the surfaces of monodisperse silica to effectively depress the optical degradation of their photoluminescence (PL) and random lasing stabilities, hence achieving highly stable and low-threshold lasing. An amination-mediated nucleation and growth process is designed for the general and one-pot synthesis of Pe-QDs on the surfaces of silica spheres. The facile synthetic process, which can be finished within several minutes, insures scalable production. Surprisingly, almost no PL degradation is observed after 40 d storage under ambient conditions, even 80% PL intensity can be maintained after persistently illuminated by UV lamps for 108 h. Subsequently, extremely stable random lasing is achieved after storage for 2 months or over continuously optical pumping for 8 h. Such high PL and lasing stabilities originate from the isolation effects due to the effective anchoring, which separate the Pe-QDs from each other and inhibit the photoinduced regrowth and deterioration. This work will also open the window of perovskite-based multifunctional systems.
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