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Bipolar Tetraarylsilanes as Universal Hosts for Blue, Green, Orange, and White Electrophosphorescence with High Efficiency and Low Efficiency Roll-Off
Gong, Shaolong1; Chen, Yonghua2; Luo, Jiajia1; Yang, Chuluo1; Zhong, Cheng1; Qin, Jingui1; Ma, Dongge2
2011-03-22
Source PublicationADVANCED FUNCTIONAL MATERIALS
ISSN1616-301X
Volume21Issue:6Pages:1168-1178
AbstractA series of tetraarylsilane compounds, namely p-BISiTPA (1), m-BISiTPA (2), p-OXDSiTPA (3), m-OXDSiTPA (4), are designed and synthesized by incorporating electron-donating arylamine and electron-accepting benzimidazole or oxadiazole into one molecule via a silicon-bridge linkage mode. Their thermal, photophysical and electrochemical properties can be finely tuned through the different groups and linking topologies. The para-disposition compounds 1 and 3 display higher glass transition temperatures, slightly lower HOMO levels and triplet energies than their meta-disposition isomers 2 and 4, respectively. The silicon-interrupted conjugation of the electron-donating and electron-accepting segments gives these materials the following advantages: i) relative high triplet energies in the range of 2.69-2.73 eV; ii) HOMO/LUMO levels of the compounds mainly depend on the electron-donating and electron-accepting groups, respectively; iii) bipolar transporting feature as indicated by hole-only and electron-only devices. These advantages make these materials ideal universal hosts for multicolor phosphorescent OLEDs. 1 and 3 have been demonstrated as universal hosts for blue, green, orange and white electrophosphorescence, exhibiting high efficiencies and low efficiency roll-off. For example, the devices hosted by 1 achieve maximum external quantum efficiencies of 16.1% for blue, 22.7% for green, 20.5% for orange, and 19.1% for white electrophosphorescence. Furthermore, the external quantum efficiencies are still as high as 14.2% for blue, 22.4% for green, 18.9% for orange, and 17.4% for white electrophosphorescence at a high luminance of 1000 cd m(-2). The two-color, all-phosphor white device hosted by 3 acquires a maximum current efficiency of 51.4 cd A(-1), and a maximum power efficiency of 51.9 lm W-1. These values are among the highest for single emitting layer white PhOLEDs reported till now.
DOI10.1002/adfm.201002066
Indexed BySCI
Language英语
WOS IDWOS:000288559100020
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:191[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72416
Collection中国科学院化学研究所
Corresponding AuthorGong, Shaolong
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
Gong, Shaolong,Chen, Yonghua,Luo, Jiajia,et al. Bipolar Tetraarylsilanes as Universal Hosts for Blue, Green, Orange, and White Electrophosphorescence with High Efficiency and Low Efficiency Roll-Off[J]. ADVANCED FUNCTIONAL MATERIALS,2011,21(6):1168-1178.
APA Gong, Shaolong.,Chen, Yonghua.,Luo, Jiajia.,Yang, Chuluo.,Zhong, Cheng.,...&Ma, Dongge.(2011).Bipolar Tetraarylsilanes as Universal Hosts for Blue, Green, Orange, and White Electrophosphorescence with High Efficiency and Low Efficiency Roll-Off.ADVANCED FUNCTIONAL MATERIALS,21(6),1168-1178.
MLA Gong, Shaolong,et al."Bipolar Tetraarylsilanes as Universal Hosts for Blue, Green, Orange, and White Electrophosphorescence with High Efficiency and Low Efficiency Roll-Off".ADVANCED FUNCTIONAL MATERIALS 21.6(2011):1168-1178.
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