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Enhanced brightness and efficiency of organic light-emitting diodes with an LiF in the Alq3

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7 Author(s)
Kim, Young Min ; Coll. of Eng., Korea Univ., Seoul, South Korea ; Joo Won Lee ; Jae Hoon Jung ; Paek, Kyeong-Kap
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Highly efficient and bright organic light-emitting diodes have been realized by inserting a thin insulating lithium fluoride (LiF) layer in the tris-(8-hydroxyquinoline) aluminum (Alq3) with conventional organic layers. By comparing the performances of newly devised devices as a function of the position of the LiF in the Alq3 layer, the authors propose the optimal position of the LiF in the Alq3 layer. Experimental results show that the efficiency and brightness of the newly devised device with LiF in the Alq3 layer were seven times higher than that without LiF in the Alq3 layer.

Published in:

Electron Device Letters, IEEE  (Volume:27 ,  Issue: 7 )

Date of Publication:

July 2006

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