Organic light-emitting device using new distyrylarylene host materials |
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Affiliation: | 1. Department of Chemistry and Institute of Basic Science, Dankook University, Chungnam 330-714, Republic of Korea;2. OLED Team, Daejoo Electronic Materials, Siheung, Kyung-gi 429-848, Republic of Korea;3. Department of Electronic Engineering, Dankook University, Chungnam 330-714, Republic of Korea |
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Abstract: | Novel distyrylarylene-based blue host materials, 4,4′-bis(1,2-diphenylvinyl)-p-terphenyl (2), 4,4′-bis1-phenyl-2-(p-tolyl)vinyl]-p-terphenyl (3) and 4,4′-bis1-phenyl-2-(4,4′-biphenyl)vinyl]-p-terphenyl (4) were successfully synthesized using 4,4′-bisbenzoyl-p-terphenyl (1) through Wittig–Hornor reaction and a blue organic light-emitting diode (OLED) was made from them. The structure of the blue device is ITO/DNTPD/NPB/Host:DSA-Ph/Alq3/Al-LiF. Here, NPB is used as a hole transport layer, DNTPD as the hole injection layer, DSA-Ph as the blue dopant, Alq3 as the electron transport layer and Al as the cathode. The blue device doped with 5%-DSA-Ph shows a blue EL spectrum at 463 nm and a high efficiency of 4.14–5.13 cd/A. |
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