High efficiency blue phosphorescent organic light-emitting diodes without electron transport layer |
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| Authors: | Soon Ok Jeon |
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| Institution: | Department of Polymer Science and Engineering, Dankook University, Jukjeon-dong, Suji-gu, Yongin-si, Gyeonggi-do 448-701, Republic of Korea |
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| Abstract: | High efficiency blue phosphorescent organic light-emitting diodes were fabricated without an electron transport layer using a spirobifluorene based blue triplet host material. The simple blue PHOLEDs without the electron transport layer showed a high external quantum efficiency and current efficiency of 16.1% and 30.2 cd/A, respectively. The high device performances of the electron transport layer free blue PHOLEDs were comparable to those of blue PHOLEDs with the electron transport layer. |
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| Keywords: | High efficiency Simple device Blue phosphorescent organic light-emitting diodes |
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