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High-performance blue and green electrophosphorescence achieved by using carbazole-containing bipolar tetraarylsilanes as host materials
Gong, Shaolong2; Chen, Yonghua1; Zhang, Xin2; Cai, Peijun2; Zhong, Cheng2; Ma, Dongge1; Qin, Jingui2; Yang, Chuluo2
2011
Source PublicationJOURNAL OF MATERIALS CHEMISTRY
ISSN0959-9428
Volume21Issue:30Pages:11197-11204
AbstractA series of carbazole-containing tetraarylsilane compounds, namely p-BISiPCz (1), m-BISiPCz (2), p-OXDSiPCz (3) and m-OXDSiPCz (4) were designed and synthesized by incorporating electron-donating carbazole 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 di-para-position compounds 1 and 3 display higher glass transition temperatures and slightly lower triplet energies than their di-meta-position isomers 2 and 4, respectively. The four compounds exhibit similar HOMO levels (5.60-5.63 eV), while the LUMO level of 3 (2.36 eV) is slightly lower than that of 4 (2.28 eV). The silicon-interrupted conjugation of the electron-donating and electron-accepting segments endows these materials with relative high triplet energies, good thermal and morphological stability, and bipolar transporting ability. For FIrpic-based blue PhOLEDs, the di-meta-position compounds 2 and 4 display better device performances than their di-para-position analogues 1 and 3, respectively. Device B using 2 as the host exhibits the best performance with a maximum current efficiency of 29.3 cd A(-1), a maximum power efficiency of 19.8 lm W(-1), and a maximum external quantum efficiency of 11.4%. Green phosphorescent devices using (ppy)(2)Ir(acac) as guest and 1-4 as hosts show excellent EL performances with maximum external quantum efficiencies of 18.3-22.2%. Remarkably, device H hosted by 4 still exhibits an external quantum efficiency of 19.4% at the extremely high luminance of 10 000 cd m (2). These efficiencies are significantly higher than those of blue and green control devices using mCP as host, respectively.
DOI10.1039/c1jm11208b
Indexed BySCI
Language英语
WOS IDWOS:000292974400022
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/71352
Collection中国科学院化学研究所
Corresponding AuthorMa, Dongge
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Wuhan Univ, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Gong, Shaolong,Chen, Yonghua,Zhang, Xin,et al. High-performance blue and green electrophosphorescence achieved by using carbazole-containing bipolar tetraarylsilanes as host materials[J]. JOURNAL OF MATERIALS CHEMISTRY,2011,21(30):11197-11204.
APA Gong, Shaolong.,Chen, Yonghua.,Zhang, Xin.,Cai, Peijun.,Zhong, Cheng.,...&Yang, Chuluo.(2011).High-performance blue and green electrophosphorescence achieved by using carbazole-containing bipolar tetraarylsilanes as host materials.JOURNAL OF MATERIALS CHEMISTRY,21(30),11197-11204.
MLA Gong, Shaolong,et al."High-performance blue and green electrophosphorescence achieved by using carbazole-containing bipolar tetraarylsilanes as host materials".JOURNAL OF MATERIALS CHEMISTRY 21.30(2011):11197-11204.
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