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Ultra-stable phosphor of h-BN white graphene-loaded all-inorganic perovskite nanocrystals for white LEDs
- Source :
- Journal of Luminescence. 219:116941
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Recently, all-inorganic perovskite (CsPbX3 (X = Cl, Br, I)) nanocrystals (NCs) have caused extensive attention due to their high photoluminescence quantum yield (PL QY), high color purity, and narrow full width at half maximum (FWHM). Although the excellent optical properties of perovskite NCs (PNCs) endow them good application prospects, their inherent instability severely limits the commercialization process. In this paper, highly-luminescence and ultra-stable phosphor were obtained by loading PNCs onto the surface of amino modified hexagonal boron-nitride (h-BN) white graphene (PNCs-BNWG), This structural design can effectively suppress the attenuation of photoluminescence (PL) intensity and enhance thermal stability, thereby realizing the high stability and brightness white LEDs. The synthesis process is simple and can be finished in a few minutes to ensure scalable production. Compared with bare PNCs, it can maintain excellent optical properties. The high PL QY and thermal stability mainly stem from the isolation effect that separates PNCs from each other on the surface of BNWG and their superior high transparency as well as thermal conductivity. In addition, multi-color inks are produced by dispersing PNCs-BNWG nanocomposites in PDMS to form a multicolor painting demonstrating high PL QY and wide color gamut.
- Subjects :
- Materials science
Photoluminescence
Nanocomposite
business.industry
Graphene
Biophysics
Phosphor
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Biochemistry
Atomic and Molecular Physics, and Optics
0104 chemical sciences
law.invention
Full width at half maximum
law
Optoelectronics
Thermal stability
0210 nano-technology
business
Perovskite (structure)
Light-emitting diode
Subjects
Details
- ISSN :
- 00222313
- Volume :
- 219
- Database :
- OpenAIRE
- Journal :
- Journal of Luminescence
- Accession number :
- edsair.doi...........f64f1ca50b873e5d417712f3149710bd