Above 20% external quantum efficiency in green and white phosphorescent organic light-emitting diodes using an electron transport type green host material |
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| Authors: | Soon Ok Jeon Jun Yeob Lee |
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| Affiliation: | Department of Polymer Science and Engineering, Dankook University, 126, Jukjeon-dong, Suji-gu, Yongin-si, Gyeonggi-do 448-701, Republic of Korea |
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| Abstract: | Highly efficient green and white phosphorescent organic light emitting diodes were developed using a green phosphorescent host material based on phenyl substituted spirobifluorene. A high quantum efficiency of 25.3% was achieved in the green phosphorescent device and a high quantum efficiency of 21.6% was obtained in the white device with a stacked emitting structure of deep blue and red:green emitting layers. |
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| Keywords: | Phosphorescent white organic light emitting diodes High efficiency Green phosphorescent host |
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