High-performance hybrid white organic light-emitting diodes with simple emitting structures and low efficiency roll-off based on blue thermally activated delayed fluorescence emitters with bipolar transport characteristics

doi:10.1039/c8tc02628a

CORC > 化学研究所 > 中国科学院化学研究所

	High-performance hybrid white organic light-emitting diodes with simple emitting structures and low efficiency roll-off based on blue thermally activated delayed fluorescence emitters with bipolar transport characteristics
	Zhao, Chenyang 1,2; Zhang, Tianmu 1; Chen, Jiangshan 3; Yan, Donghang 1; Ma, Dongge 1,3
刊名	JOURNAL OF MATERIALS CHEMISTRY C
	2018-09-21
卷号	6 期号:35 页码:9510-9516
ISSN号	2050-7526
DOI	10.1039/c8tc02628a
英文摘要	A large density of excitons under high current density is accounted for by the sharp decay of efficiency (called efficiency roll-off) in white organic light-emitting diodes (WOLEDs). In this paper, by strategically inserting ultrathin layers of long-wavelength phosphorescent emitters in appropriate positions in blue emitters with bipolar transport characteristics, highly efficient hybrid WOLEDs with simple emitting structures and reduced efficiency roll-off as well as a satisfactory color rendering index (CRI) are well-achieved. Based on our design concept, the exciton distribution zone is very broad, and the nonradiative exciton loss is significantly reduced. The optimized hybrid WOLED exhibits a maximum external quantum efficiency (EQE), a current efficiency (CE), and a power efficiency (PE) of 19.1%, 41.6 cd A(-1), and 42.4 lm W-1, and maintains 17.3%, 39.2 cd A(-1), and 30.5 lm W-1 at a luminance of 1000 cd m(-2). Systematic studies of the electrical properties and transient electroluminescence decay characteristics are performed to confirm the reasons for the reduced efficiency roll-off and the exciton utilization process in the optimized hybrid WOLEDs.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000445219400023
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/43027]
专题	中国科学院化学研究所
通讯作者	Yan, Donghang; Ma, Dongge
作者单位	1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Jilin, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China 3.South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Chenyang,Zhang, Tianmu,Chen, Jiangshan,et al. High-performance hybrid white organic light-emitting diodes with simple emitting structures and low efficiency roll-off based on blue thermally activated delayed fluorescence emitters with bipolar transport characteristics[J]. JOURNAL OF MATERIALS CHEMISTRY C,2018,6(35):9510-9516.
APA	Zhao, Chenyang,Zhang, Tianmu,Chen, Jiangshan,Yan, Donghang,&Ma, Dongge.(2018).High-performance hybrid white organic light-emitting diodes with simple emitting structures and low efficiency roll-off based on blue thermally activated delayed fluorescence emitters with bipolar transport characteristics.JOURNAL OF MATERIALS CHEMISTRY C,6(35),9510-9516.
MLA	Zhao, Chenyang,et al."High-performance hybrid white organic light-emitting diodes with simple emitting structures and low efficiency roll-off based on blue thermally activated delayed fluorescence emitters with bipolar transport characteristics".JOURNAL OF MATERIALS CHEMISTRY C 6.35(2018):9510-9516.