ICCAS OpenIR
Morphological Stable Spirobifluorene/Oxadiazole Hybrids as Bipolar Host Materials for Efficient Green and Red Electrophosphorescence
Tao, Youtian1; Ao, Liang1; Wang, Qiang2; Zhong, Cheng1; Yang, Chuluo1; Qin, Jingui1; Ma, Dongge2
2010
Source PublicationCHEMISTRY-AN ASIAN JOURNAL
ISSN1861-4728
Volume5Issue:2Pages:278-284
AbstractA series of 9,9'-spirobifluorene/oxadiazole hybrids with various linkages between two components, namely SBF-p-OXD (1), SBF-m-OXD (2), and SBF-o-OXD (3) are designed and synthesized through Suzuki cross-coupling reactions. The incorporation of a rigid and bulky spirobifluorene moiety greatly improves their thermal and morphological stability, with T(d) (decomposition temperature) and T(g) (glass transition temperature) in the ranoes of 401-480 degrees C and 136-210 degrees C, respectively. 2 and 3 with meta- and ortho-linkage display higher triplet energy and blue-shifted absorption and emission than their para-linked analogue 1 owing to the decreasing pi-conjugation between the two components. Their HOMO and LUMO energy levels depend on the linkage modes within the range of 5.57-5.64 eV and 2.33-2.49eV, respectively. Multilayer deep red electrophosphorescent devices with 1-3 as hosts were fabricated and their EL efficiencies follow the order of 3 (o) > 2 (m) > 1 (p), which correlates with their triplet energy and the separation of HOMO and LUMO distributions at Molecular orbitals. The maximum external quantum efficiencies of 11.7% for green and 9.8% for deep red phosphorescent organic light-emitting diodes (OLEDs) are achieved by using 2 and 3 as host materials. respcctively.
KeywordHost-guest Systems Structure Heterocycles Phosphorescence Spiro Compounds
DOI10.1002/asia.200900433
Indexed BySCI
Language英语
WOS IDWOS:000274539100010
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/70082
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
Tao, Youtian,Ao, Liang,Wang, Qiang,et al. Morphological Stable Spirobifluorene/Oxadiazole Hybrids as Bipolar Host Materials for Efficient Green and Red Electrophosphorescence[J]. CHEMISTRY-AN ASIAN JOURNAL,2010,5(2):278-284.
APA Tao, Youtian.,Ao, Liang.,Wang, Qiang.,Zhong, Cheng.,Yang, Chuluo.,...&Ma, Dongge.(2010).Morphological Stable Spirobifluorene/Oxadiazole Hybrids as Bipolar Host Materials for Efficient Green and Red Electrophosphorescence.CHEMISTRY-AN ASIAN JOURNAL,5(2),278-284.
MLA Tao, Youtian,et al."Morphological Stable Spirobifluorene/Oxadiazole Hybrids as Bipolar Host Materials for Efficient Green and Red Electrophosphorescence".CHEMISTRY-AN ASIAN JOURNAL 5.2(2010):278-284.
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