DOI: 10.1016/j.scib.2021.06.018
论文题名: Exceptionally efficient deep blue anthracene-based luminogens: design, synthesis, photophysical, and electroluminescent mechanisms
作者: Guo R. ; Liu W. ; Ying S. ; Xu Y. ; Wen Y. ; Wang Y. ; Hu D. ; Qiao X. ; Yang B. ; Ma D. ; Wang L.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
语种: 英语
中文关键词: Anthracene derivative
; Deep blue luminogen
; Hot excitons
; Non-doped device
; Triplet-triplet annihilation up-conversion
英文关键词: Absorption spectroscopy
; Efficiency
; Electroluminescence
; Fluorescence
; Organic light emitting diodes (OLED)
; Supercomputers
; Anthracene derivatives
; Benzonitriles
; Carbazol
; Deep blue
; Deep blue luminogen
; External quantum efficiency
; Higher efficiency
; Hot exciton
; Non-doped devices
; Triplet-triplet annihilation up-conversion
; Anthracene
英文摘要: Achieving high-efficiency deep blue emitter with CIEy < 0.06 (CIE, Commission Internationale de L'Eclairage) and external quantum efficiency (EQE) >10% has been a long-standing challenge for traditional fluorescent materials in organic light-emitting diodes (OLEDs). Here, we report the rational design and synthesis of two new deep blue luminogens: 4-(10-(4′-(9H-carbazol-9-yl)-2,5-dimethyl-[1,1′-biphenyl]-4-yl)anthracen-9-yl)benzonitrile (2M-ph-pCzAnBzt) and 4-(10-(4-(9H-carbazol-9-yl)-2,5-dimethylphenyl)anthracen-9-yl)benzonitrile (2M-pCzAnBzt). In particular, 2M-ph-pCzAnBzt produces saturated deep blue emissions in a non-doped electroluminescent device with an exceptionally high EQE of 10.44% and CIEx,y (0.151, 0.057). The unprecedented electroluminescent efficiency is attributed to the combined effects of higher-order reversed intersystem crossing and triplet-triplet up-conversion, which are supported by analysis of theoretical calculation, triplet sensitization experiments, as well as nanosecond transient absorption spectroscopy. This research offers a new approach to resolve the shortage of high efficiency deep blue fluorescent emitters. © 2021 Science China Press Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170257
Appears in Collections: 气候变化与战略
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作者单位: Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China; State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, 510640, China; State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, 130012, China
Recommended Citation:
Guo R.,Liu W.,Ying S.,et al. Exceptionally efficient deep blue anthracene-based luminogens: design, synthesis, photophysical, and electroluminescent mechanisms[J]. Science Bulletin,2021-01-01