期刊
NANOSCALE
卷 8, 期 24, 页码 12182-12188出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nr02922a
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资金
- National Nature Science Foundation of China [61504040, 61474037]
- Program for Science & Technology Innovation Talents in University of Henan Province [14HASTIT009]
- National High Technology Research and Development Program (863 Program) [2013AA032204]
Colloidal nanoplatelets (NPLs) have recently been introduced as semiconductor emissive materials for the fabrication of quantum dot light-emitting diodes (QLED) on account of their ultra-narrow photoluminescence (PL) linewidth. In this paper, we report a multilayer all solution-processed green QLED based on colloidal CdSe/CdS core/shell NPLs with a narrow PL full-width-at-half-maximum (FWHM) of 12 nm. Our characterization results reveal that this kind of NPL containing QLED exhibit a low operating voltage of 2.25 V and a maximum luminance up to 33 000 cd m(-2), and peak external quantum efficiency (EQE) of 5%, corresponding to 12.5 cd A(-1) in luminance efficiency. Particularly, these devices show ultra-high color purity for electroluminescence (EL) with FWHM of 14 nm. As extremely narrow EL and ultra-pure color is highly attractive in the applications of LED industries, this work signifies the unique potential application of one new class of colloidal core/shell NPLs in achieving bright and efficient LEDs with superior color saturation.
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