This paper reports that the polymer/organic heterojunction doped light-emitting diodes using a novel poly-TPD as hole transport material and doping both hole transport layer and emitter layer with the highly fluorescent rubrene and DCJTB has been Successfully fabricated.The basic structure of the heterostructure is PTPD/Alq3.when hole transport layer and electton transport layer are doped simultaneously with difierent dopant,the electroluminescence quantum efficiencies are about 3 times greater than that of the undoped device.Compared with undoped device and conventional TPD/Alq3 diode,the stability of the doping device is significantly improved.The process of emission for doped device may include carrier trapping as well as F(o) rster energy transfer.