White LED based on CsPbBr3 nanocrystal phosphors via a facile two-step solution synthesis route
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory of UV-Emitting Materials and Technology (Northeast Normal University), Ministry of Education, Changchun, 130024 (China)
Highlights: • The work shows a simple and effective strategy to synthesize perovskite materials. • A LED with CsPbBr{sub 3} nanocrystals as green phosphors was fabricated. • Notable stability of the CsPbBr{sub 3} nanocrystals was verified. - Abstract: All-inorganic CsPbBr{sub 3} perovskite nanocrystals with mean size of ∼300 nm were synthesized via a facile two-step solution synthesis route. High-resolution transmission electron microscopy and X-ray diffraction characterizations confirm the as-prepared CsPbBr{sub 3} nanoparticles are single-crystals with good crystallinity, although a CsPb{sub 2}Br{sub 5} impure phase also exists in the final product. Power-/temperature-dependent and time-resolved photoluminescence measurements reveal the notable and stable excitonic emission feature of these CsPbBr{sub 3} nanocrystals. As a proof-of-concept demonstration, a LED with p-GaN/n-ZnO heterojunction as blue-violet excitation chip and CsPbBr{sub 3} nanocrystals as green phosphors, was fabricated and a white electroluminescence was achieved from this perovskite nanocrystals decorated LED.
- OSTI ID:
- 22804080
- Journal Information:
- Materials Research Bulletin, Vol. 104; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTROLUMINESCENCE
GALLIUM NITRIDES
HETEROJUNCTIONS
INORGANIC PHOSPHORS
LIGHT EMITTING DIODES
MONOCRYSTALS
NANOPARTICLES
NANOSTRUCTURES
PEROVSKITE
PHOTOLUMINESCENCE
SYNTHESIS
TEMPERATURE DEPENDENCE
TIME RESOLUTION
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
ZINC OXIDES