1. New Amorphous Hole Blocking Materials for High Efficiency OLEDs
- Author
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Yun-Hi Kim, Dong Min Kang, Sung Ouk Jung, Soon-Ki Kwon, Sungjin Park, Jeongsik Kim, Hyoung-Yun Oh, Jong-Won Park, Jung-Hwan Yang, and Pengtao Kang
- Subjects
Materials science ,Blocking (radio) ,business.industry ,Biomedical Engineering ,Oxadiazole ,Bioengineering ,General Chemistry ,Electroluminescence ,Condensed Matter Physics ,Amorphous solid ,chemistry.chemical_compound ,chemistry ,OLED ,Optoelectronics ,General Materials Science ,Molecular materials ,business ,Electrical efficiency ,Diode - Abstract
Two new amorphous molecular materials, 2,5-bis(2′,5′-dimethyl-4-triphenylsilyl-phenyl)-[1,3,4]oxadiazole (BDTSO) and 2,5-bis(2′,5′-dimethyl-4-triphenylsilyl-phenyl)-[1,3,4]thiadiazole (BDTST) were synthesized and investigated as hole blocking materials (HBM) for organic light-emitting diodes. The efficiency of electroluminescent device was improved by using BDTSO instead of BAlq. The current and power efficiency of the device using BDTSO as HBM is 39.6 cd/A and 13.1 lm/W at 10 mA/cm2, respectively, which is higher compared to the same values for devices using BDTST and BAq which are typically used as HBM.
- Published
- 2008
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