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Start Over Author "Park, Jung Sun" Journal japanese journal of applied physics
5 results on '"Park, Jung Sun"'

5. Hybrid White Organic Light-Emitting Diodes with Reduced Efficiency Roll-Off

Author

Seo, Ji Hoon, Park, Jung Sun, Koo, Ja Ryong, Seo, Bo Min, Lee, Kum Hee, Park, Jeong Keun, Yoon, Seung Soo, and Kim, Young Kwan

Abstract

The authors have demonstrated hybrid white organic light-emitting diodes (HWOLEDs) with reduced efficiency roll-off. It was shown that HWOLEDs fabricated with {9,9-dimethyl-7-[10-(naphthalen-2-yl)anthracen-9-yl]-9H-fluoren-2-yl} triphenylsilane (ANFTPS) as the blue host have the maximum external quantum efficiency of 9.92%, power efficiency of 14.51 lm/W, and reduced efficiency roll-off 2.0 times that of the control white device. The deep highest occupied molecular orbital of ANFTPS of the optimized white device adequately brocks holes and confines excitons in emitting layers. The white device also exhibited a more stable color shift from low to high current density than did the control white device.

Published
2010
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