100% internal quantum efficiency and stable efficiency roll-off in phosphorescent light-emitting diodes using a high triplet energy hole transport material

100% internal quantum efficiency and stable efficiency roll-off in phosphorescent light-emitting diodes using a high triplet energy hole transport material

Highly efficient green phosphorescent organic light-emitting diodes were developed by using high triplet energy hole transport materials. The quantum efficiency of green devices could be improved from 12% to 20% at 1000cd∕m2 by using a phenylcarbazole based hole transport material. In addition, the...

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Veröffentlicht in:Applied physics letters 2008-08, Vol.93 (6)
Hauptverfasser: Jeon, Soon-Ok, Yook, Kyoung Soo, Joo, Chul Woong, Lee, Jun Yeob, Ko, Kwang-Youn, Park, Jong-Yek, Baek, Yong Gu
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container_issue 6
container_start_page
container_title Applied physics letters
container_volume 93
creator Jeon, Soon-Ok
Yook, Kyoung Soo
Joo, Chul Woong
Lee, Jun Yeob
Ko, Kwang-Youn
Park, Jong-Yek
Baek, Yong Gu
description Highly efficient green phosphorescent organic light-emitting diodes were developed by using high triplet energy hole transport materials. The quantum efficiency of green devices could be improved from 12% to 20% at 1000cd∕m2 by using a phenylcarbazole based hole transport material. In addition, the high quantum efficiency could be stably maintained up to a high luminance of 10000cd∕m2.
doi_str_mv 10.1063/1.2969786
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title 100% internal quantum efficiency and stable efficiency roll-off in phosphorescent light-emitting diodes using a high triplet energy hole transport material
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