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Effect of thin LiF layers in multi-layered PVCz polymer LEDs
Hiroki Yoshihara,Yousuke Tanaka,Suiko Tanaka,Masahiko Kitagawa,Hiroyuki Kusano,Hiroshi Kobayashi 한국물리학회 2005 Current Applied Physics Vol.5 No.1
We have investigated in detail the dependence of the electroluminescent characteristics on the thin LiF layer inserted under theelectrode layer of multi-layered PVCz polymer light emitting diode (PLED). Clear dependency has been obtained and reduction inthe operating voltage, improvement in luminance and the luminous and current eciencies have been realized with the optimizationof the thickness. The eect of thin LiF layer has been analyzed by using the current voltage dependence at low voltage regions andthe current is supposed to be carried considered LiF layer by tunnel injection between the PVCz layer and the electrode layer