ICCAS OpenIR
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, Chenyang1,2; Zhang, Tianmu1; Chen, Jiangshan3; Yan, Donghang1; Ma, Dongge1,3
2018-09-21
Source PublicationJOURNAL OF MATERIALS CHEMISTRY C
ISSN2050-7526
Volume6Issue:35Pages:9510-9516
AbstractA 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.
DOI10.1039/c8tc02628a
Indexed BySCI
Language英语
WOS IDWOS:000445219400023
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/43028
Collection中国科学院化学研究所
Corresponding AuthorYan, Donghang; Ma, Dongge
Affiliation1.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
Recommended Citation
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.
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