【摘 要】
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We fabricate an inverted bottom-emission organic light emitting diode(IBOLED)employing two n-doped layers,i.e.,5nm lithium carbonate doped PTCDA(1:2 Li2CO3:PTCD
【机 构】
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Institute oF Polymer Science and Engineering,School of Chemical Engineering,Hebei University of Tech
论文部分内容阅读
We fabricate an inverted bottom-emission organic light emitting diode(IBOLED)employing two n-doped layers,i.e.,5nm lithium carbonate doped PTCDA(1:2 Li2CO3:PTCDA)with 5nm Li2CO3 doped BCP(1:4 Li2CO3:BCP)on top,where PTCDA and BCP stand for 3,4,9,10 perylenetetracarboxylic dianhydride and bathcuporine,respectively.Compared to the IBOED using a layer of 1Ohm 1:4 Li2CO3:BCP,the one utilizing the two-layer combination of 5nm 1:2 Li2CO3:PTCDA and 5nm 1:4 Li2CO3:BCP shows decreasing operation voltage and thereby increasing power efficiency,mainly attributed to the higher electron conductivity of 1:2 Li2CO3:PTCDA than that of i:4 Li2CO3:BCP.The mechanism of the electron transport through the interface of 1:2 Li2CO3:PTCDA and 1:4 Li2CO3:BCP is also discussed.We provide a simply and effective structure to enhance the current conduction for IBOLEDs.
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