Enhancement of electroluminescent properties of organic optoelectronic integrated device by doping phosphorescent dye

doi:10.1088/1674-1056/26/11/117001

Abstract Organic optoelectronic integrated devices (OIDs) with ultraviolet (UV) photodetectivity and different color emitting were constructed by using a thermally activated delayed fluorescence (TADF) material 4, 5-bis(carbazol-9-yl)-1, 2-dicyanobenzene (2CzPN) as host. The OIDs doping with typical red phosphorescent dye[tris(1-phenylisoquinoline)iridium(Ⅲ), Ir(piq)₃], orange phosphorescent dye bis[2-(4-tertbutylphenyl)benzothiazolato-N, C^2']iridium (acetylacetonate), (tbt)₂Ir(acac), and blue phosphorescent dye[bis(2, 4-di-fluorophenylpyridinato)-tetrakis(1-pyrazolyl)borate iridium(Ⅲ), FIr6] were investigated and compared. The (tbt)₂Ir(acac)-doped orange device showed better performance than those of red and blue devices, which was ascribed to more effective energy transfer. Meanwhile, at a low dopant concentration of 3 wt.%, the (tbt)₂Ir(acac)-doped OIDs showed the maximum luminance, current efficiency, power efficiency of 70786 cd/m², 39.55 cd/A, and 23.92 lm/W, respectively, and a decent detectivity of 1.07×10¹¹ Jones at a bias of-2 V under the UV-350 nm illumination. This work may arouse widespread interest in constructing high efficiency and luminance OIDs based on doping phosphorescent dye.

Keywords: organic optoelectronic integrated device thermally activated delayed fluorescence host phosphorescent dye high luminance

Received: 04 June 2017
Revised: 26 July 2017
Accepted manuscript online:

PACS:	70.60.Fi
	85.60.Jb	(Light-emitting devices)
	85.60.Gz	(Photodetectors (including infrared and CCD detectors))
	73.61.Ph	(Polymers; organic compounds)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61675041) and the National Science Funds for Creative Research Groups of China (Grant No. 61421002).

Corresponding Authors: Jian Zhong
E-mail: zhongjian@uestc.edu.cn

Cite this article:

Shu-ying Lei(雷疏影), Jian Zhong(钟建), Dian-li Zhou(周殿力), Fang-yun Zhu(朱方云), Chao-xu Deng(邓朝旭) Enhancement of electroluminescent properties of organic optoelectronic integrated device by doping phosphorescent dye 2017 Chin. Phys. B 26 117001

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Enhancement of electroluminescent properties of organic optoelectronic integrated device by doping phosphorescent dye

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