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Non-doped white organic light-emitting devices consisting of thermally activated delayed fluorescent emitters and ultrathin phosphorescent emitters
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Paper Abstract

Fluorescence/phosphorescence hybrid white organic light-emitting devices (WOLEDs) with non-doped emitting layers are constructed based on blue, green and red dyes. The simplified emitting layers (EMLs) are fabricated with structure of Blue/Red/Blue/Green hybrid emitting layers consisting of an ultrathin non-doped green phosphorescence layer employing Tris(2-phenylpyridine)iridium (Ir(ppy)3), an ultrathin non-doped red phosphorescence layer using Tris(1-(4-hexylphenyl)-isoquinolinato-C2,N)iridium(III) (Ir(h-piq)3), and double non-doped blue thermally activated delayed fluorescence (TADF) layers using 9,9-dimethyl-9,10-dihydroacridine- diphenylsulfone (DMAC-DPS). A white OLED are fabricated with relatively stable electroluminescence spectra of white emission achieves maximum luminance, maximum current efficiency, power efficiency and external quantum efficiency of 21596cd/m2, 8.45 cd/A, 11.57 lm/W and 6%, respectively. The result shows a slight variation of Commission International de l’Eclairage (CIE) coordinates (0.026, 0.051) at a luminance ranging from 32 cd/m2 to 2728 cd/m2. It suggests that the bipolar charge carrier transport property of DMAC-DPS contributes to control of exciton recombination in the emissive regions and balance white emission.

Paper Details

Date Published: 8 February 2019
PDF: 6 pages
Proc. SPIE 10843, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing and Imaging, 1084310 (8 February 2019); doi: 10.1117/12.2506363
Show Author Affiliations
Qinxue Li, Univ. of Electronic Science and Technology of China (China)
Zijun Wang, Univ. of Electronic Science and Technology of China (China)
Yingying Yuan, Univ. of Electronic Science and Technology of China (China)
Geng Feng, Univ. of Electronic Science and Technology of China (China)
Jian Zhong, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 10843:
9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing and Imaging
Yadong Jiang; Xiaoliang Ma; Xiong Li; Mingbo Pu; Xue Feng; Bernard Kippelen, Editor(s)

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