Date

Place

[P2-119]
14:00 ~ 15:30
Title:New Bipolar Host Materials with Indenocarbazole Chemical Moiety for Yellow Phosphorescent Organic Light-Emitting Diodes
Gyeong Heon Kim, Jung Min Lee, Byoung Yeop Kang, and Jang Hyuk Kwon (Kyung Hee Univ., Korea)
Abstract: In this study, we report two bipolar host materials, ICBP1 and?ICBP2 for highly efficient yellow phosphorescent organic light-emitting diodes?with indenocarbazole moiety as a hole-transporting unit and biphenyl moiety as an electron-transporting unit. The indenocarbazole is expected to provide high hole transporting property as well as better charge carrier stability due to longer conjugation length than CBP. We investigate thermal, photo-physical and electrochemical properties of our newly synthesized these two host materials. The measured triplet energy values of ICBP1 and ICBP2 are 2.63 and 2.58 eV, respectively. These energy values are proper to transfer triplet energy from new host materials to yellow phosphorescent dopant. Fabricated yellow phosphorescent OLEDs show excellent maximum external quantum efficiency of 26.4%.
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