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N doped organic light-emitting diodes were developed by using Li 3 N as a n type dopant in electron transport layer. Driving voltage was greatly lowered by using Li 3 N doped electron transport layer and combination of MoO 3 doped hole transport layer with Li 3 N doped electron transport layer gave high quantum efficiency of 15% and low driving voltage of 4V at 1000cd/m...
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