期刊
ADVANCED OPTICAL MATERIALS
卷 10, 期 18, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202200601
关键词
blue quantum-dot LEDs; excitation-independent emission; long operation lifetime; photoluminescence quantum efficiency; ZnO@1-PyNH; (2) hybrid quantum dots
资金
- Materials, Components & Equipments Research Program - Gyeonggi Province [AICT11T2]
- KIST Institutional Program
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2021R1A66A3A01087644]
This study successfully synthesized a non-toxic quasi-type-II ZnO@1-Aminopyrene/TPBi/LiF/Al material and fabricated a highly bright and stable blue-emissive quantum dot LED display. The display exhibits high luminance, narrow emission spectrum, high luminous efficacy, and long lifetime.
Non-toxic heavy metal, low-cost indium-free blue emissive quantum dots (QDs) are critical for the realization of self-emissive electroluminescent quantum dot (ELQD) light-emitting diode (LED) displays. A facile and effective hybridization of ZnO QDs with functionalized polyaromatic hydrocarbons (f-PAHs) to synthesize a very bright and stable blue-light emissive quantum-dot LED (QLED) using non-toxic quasi-type-II ZnO@1-Aminopyrene hybrid QDs is reported. The optimized QLEDs of ITO/PEDOT:PSS/TFB/ZnO@1-Aminopyrene/TPBi/LiF/Al demonstrate very bright deep blue-light electroluminescence of 3379 cd m(-2) centered at lambda = 441 nm with a full-width-at-half maximum of 41.7 nm and CIE 1931 color coordinates of 0.17 and 0.09, a luminous efficacy of 3.32 cd A(-1), power efficiency of 2.45 lm W-1, external quantum efficiency of 2.35%, and a remarkably long lifetime T-50 of >17 830 h at 100 cd m(-2).
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