Date

Place

[P2-99]
14:00 ~ 15:30
Title:Blue Phosphorescent OLED with Interfacial Mixed Layer in the Presence of Various ETL Materials
Seung Il Yoo, Jin Wook Kim, Jin Sung Kang, Geum Jae Yoon (Hoseo Univ., Korea), Han Kyu Yoo, Sung Kyu Lee, Young Kwan Kim (Hongik Univ., Korea), and Woo Young Kim (Hoseo Univ., Korea)
Abstract: ?? In this study, we will discuss some of the important device parameters affecting the efficiency in devices with interfacial mixed layer(IML), because the effect of IML cannot be verified concretely only based on materials. TPBi, 3TPYMB and TmPyPb were selected as ETL materials with different electrical characteristics following the LUMO energy level, hole blocking barrier based on HOMO energy level, triplet energy level, and electron mobility. To investigate how the efficiency of devices with IML is affected by each property, blue PHOLEDs without IML and with IML were fabricated. Current densities of the devices with IML improved compared to the devices without IML because the electrons of ETL molecules were not only accumulated but also can be readily moved to ETL materials in EML owing to the electron transition between the same molecules.
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