White LED based on CsPbBr3 nanocrystal phosphors via a facile two-step solution synthesis route

Journal Article · Wed Aug 15 04:00:00 EDT 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2018.03.055· OSTI ID:22804080

Wang, Yue; Yang, Liu; Chen, Heyu; Liu, Chunyang ^[1]; Liu, Weizhen; Xu, Haiyang; Zhang, Cen; Wang, Zhongqiang ^[1]; Liu, Yichun ^[1]

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1. 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, Journal Name: Materials Research Bulletin Vol. 104; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
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