Adamantane-Based Wide-Bandgap Host Material: Blue Electrophosphorescence with High Efficiency and Very High Brightness

	Adamantane-Based Wide-Bandgap Host Material: Blue Electrophosphorescence with High Efficiency and Very High Brightness
	Gu, Yu 1; Zhu, Liping 2; Li, Yifan 1; Yu, Ling 1; Wu, Kailong 1; Chen, Tianheng 1; Huang, Manli 1; Wang, Feng 1; Gong, Shaolong 1; Ma, Dongge 2
刊名	CHEMISTRY-A EUROPEAN JOURNAL
	2015-05-26
卷号	21 期号:22 页码:8250-8256
关键词	doping electrophosphorescence host materials light-emitting diodes luminescence
英文摘要	An adamantane-based host material, namely, 4-{3-[4-(9H-carbazol-9-yl)phenyl]adamantan-1-yl}benzonitrile (CzCN-Ad), was prepared by linking an electron-donating carbazole unit and an electron-accepting benzonitrile moiety through an adamantane bridge. In this approach, two functional groups were attached to tetrahedral points of adamantane to construct an sp(3) topological configuration. This design strategy endows the host material with a high triplet energy of 3.03eV due to the disruption of intramolecular charge transfer. Although CzCN-Ad has a low molecular weight, the rigid nonconjugated adamantane bridge results in a glass transition temperature of 89 degrees C. These features make CzCN-Ad suitable for fabricating blue phosphorescent organic light-emitting diodes (PhOLEDs). The devices based on sky-blue phosphor bis[(4,6-difluorophenyl)pyridinato-N,C-2](picolinato)iridium(III) (FIrpic) achieved a high maximum external quantum efficiency (EQE) of 24.1%, which is among the best results for blue PhOLEDs ever reported. Furthermore, blue PhOLEDs with bis(2,4-difluorophenylpyridinato)-tetrakis(1-pyrazolyl)borate iridium(III) (FIr6) as dopant exhibited a maximum EQE of 14.2% and a maximum luminance of 34262cdm(-2). To the best of our knowledge, this is the highest luminance ever reported for FIr6-based PhOLEDs.
收录类别	SCI
语种	英语
公开日期	2015-11-02
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/28067]
专题	化学研究所_高分子物理与化学实验室
作者单位	1.Wuhan Univ, Dept Chem, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Gu, Yu,Zhu, Liping,Li, Yifan,et al. Adamantane-Based Wide-Bandgap Host Material: Blue Electrophosphorescence with High Efficiency and Very High Brightness[J]. CHEMISTRY-A EUROPEAN JOURNAL,2015,21(22):8250-8256.
APA	Gu, Yu.,Zhu, Liping.,Li, Yifan.,Yu, Ling.,Wu, Kailong.,...&Yang, Chuluo.(2015).Adamantane-Based Wide-Bandgap Host Material: Blue Electrophosphorescence with High Efficiency and Very High Brightness.CHEMISTRY-A EUROPEAN JOURNAL,21(22),8250-8256.
MLA	Gu, Yu,et al."Adamantane-Based Wide-Bandgap Host Material: Blue Electrophosphorescence with High Efficiency and Very High Brightness".CHEMISTRY-A EUROPEAN JOURNAL 21.22(2015):8250-8256.