Synthesis and Characterization of New Dibenzothiophene-based Host Materials for Blue Phosphorescent Organic Light-Emitting Diodes |
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Authors: | Hyung Jong Kim Ik Rang Choe Tae Ryang Hong Ju Sik Kang Hyun Ah Um Min Ju Cho |
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Institution: | Department of Chemistry, Research Institute for Natural Sciences, Korea University, Seoul, Republic of Korea |
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Abstract: | A series of bipolar host materials containing dibenzob,d]thiophene (DBT) or dibenzob,d]thiophene 5,5-dioxide core were successfully synthesized, and their physical, photophysical, and electrochemical properties were investigated. The three host materials showed well-localized electron distribution at the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) states, as evidenced by theoretical calculations. Triplet energies of the new host materials are higher than 2.6 eV, and the blend film with bis2-(4,6-difluorophenyl)pyridinato-C2 Misra, A. et al. (2006). Semicond. Sci. Technol., 21, R35.Crossref], Web of Science ®] , Google Scholar],N](picolinato)iridium(III) (FIrpic) as a blue phosphorescent dopant showed highly efficient energy transfer between the host material and dopant. |
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Keywords: | bipolar host material triplet energy energy transfer phosphorescence |
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