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22.2: Invited Paper : New HBL Development for High Efficiency and Long Lifetime of Blue OLED Device
Author(s) -
Kim Tae Hyung,
Park Ho Cheol,
Lee ChangJun,
Kim YoungBae,
Kim HoeMoon
Publication year - 2015
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.10335
Subject(s) - oled , materials science , layer (electronics) , optoelectronics , fluorescence , diode , blue light , electron mobility , optics , nanotechnology , physics
We were able to improve properties of blue organic light‐emitting diode (OLED) device by inserting new Hole Blocking Layer (HBL) between Emitting Layer (EML) and Electron Transport Layer (ETL). It was possible to improve properties of such blue device by using new HBL that has high electron mobility and that can block the holes at the same time. The fluorescent blue device that used new HBL‐1 and HBL‐2 showed very high efficiency: At 500 cd/m 2 , pure blue color coordinate (0.135, 0.108) and efficiency of 9.5 cd/A. On the other hand, fluorescent blue device that used HBL‐1 showed efficiency of 9.3 cd/A at pure blue color coordinate (0.134, 0.109), showing 50% lifetime increase as well.