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Diarylmethylene-bridged triphenylamine derivatives encapsulated with fluorene: very high T(g) host materials for efficient blue and green phosphorescent OLEDs
Fan, Cong1; Chen, Yonghua2; Jiang, Zuoquan1; Yang, Chuluo1; Zhong, Cheng1; Qin, Jingui1; Ma, Dongge2
2010
Source PublicationJOURNAL OF MATERIALS CHEMISTRY
ISSN0959-9428
Volume20Issue:16Pages:3232-3237
AbstractTwo bridged triphenylamine/fluorene hybrids, BTPAF1 and BTPAF2, were designed and synthesized through Friedel-Crafts reaction. Their thermal, electrochemical, electronic absorption and photoluminescent properties were fully investigated. Very high glass transition temperatures (T(g)) were observed at 204 degrees C for BTPAF1 and 211 degrees C for BTPAF2, owing to the introduction of rigid fluorene and bridged triphenylamine unit. The encapsulation of a fluorene unit at the para positions of bridged triphenylamine greatly enhances their electrochemical stability. The linkage by the quaternary carbon atom of the fluorene moiety (C-9) effectively prevents the extension of p-conjugation of the bridged triphenylamine core, and consequently means that the compounds have a high triplet energy of 2.86 eV. Phosphorescent organic light-emitting devices (PHOLEDs) fabricated by using the two compounds as the hosts and the blue emitter bis[2-(4',6'-difluorophenyl) pyridinato-N,C(2)']iridium(III) picolate (FIrpic) as the guest exhibit good EL performances with a maximum current efficiency of 20 cd A(-1), a maximum power efficiency of 14 lm W(-1), and a maximum external quantum efficiency of 9.4%. Green electrophosphorescent devices by using green-emitter iridium(III) wfac-tris(2-phenylpyridine) [Ir(ppy)(3)] as guest and the two new compounds as the hosts display excellent EL performances with a maximum current efficiency of 75 cd A(-1), a maximum power efficiency of 60 lm W(-1), and a maximum external quantum efficiency of 19.5%. The device figures of merit, together with the excellent morphological and electrochemical stabilities, make the new compounds ideal host materials for PHOLEDs, especially for high-temperature applications of devices.
DOI10.1039/b927576b
Indexed BySCI
Language英语
WOS IDWOS:000276373500015
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:52[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/69552
Collection中国科学院化学研究所
Corresponding AuthorYang, Chuluo
Affiliation1.Wuhan Univ, Dept Chem, 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
Recommended Citation
GB/T 7714
Fan, Cong,Chen, Yonghua,Jiang, Zuoquan,et al. Diarylmethylene-bridged triphenylamine derivatives encapsulated with fluorene: very high T(g) host materials for efficient blue and green phosphorescent OLEDs[J]. JOURNAL OF MATERIALS CHEMISTRY,2010,20(16):3232-3237.
APA Fan, Cong.,Chen, Yonghua.,Jiang, Zuoquan.,Yang, Chuluo.,Zhong, Cheng.,...&Ma, Dongge.(2010).Diarylmethylene-bridged triphenylamine derivatives encapsulated with fluorene: very high T(g) host materials for efficient blue and green phosphorescent OLEDs.JOURNAL OF MATERIALS CHEMISTRY,20(16),3232-3237.
MLA Fan, Cong,et al."Diarylmethylene-bridged triphenylamine derivatives encapsulated with fluorene: very high T(g) host materials for efficient blue and green phosphorescent OLEDs".JOURNAL OF MATERIALS CHEMISTRY 20.16(2010):3232-3237.
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