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以双极性小分子4,9-二(4-(2,2-二苯乙烯基)苯基)萘并[2,3-c][1,2,5]噻二唑(BDPNTD)为发光层,制备得到了单层非掺杂红色荧光有机发光二极管.通过在阳极ITO与有机层BDPNTD之间插入1nm厚的WO3或MoO3薄膜,获得了单层有机发光二极管:起亮电压为2.4V,最大发光亮度为4950cd·m-2,发光波长为636nm,CIE坐标约为(0.65,0.35).这证明了作为修饰层的WO3或MoO3薄膜可以改进ITO/BDPNTD界面的空穴注入,进而在器件中实现空穴与电子的平衡.
The bipolar small molecule 4,9-bis (4- (2,2-diphenylvinyl) phenyl) naphtho [2,3- c] [1,2,5] thiadiazole (BDPNTD) Emitting layer, a single-layer non-doped red fluorescent organic light-emitting diode was prepared.A single layer organic light-emitting diode was obtained by inserting a 1 nm thick WO3 or MoO3 thin film between the anode ITO and the organic layer BDPNTD: the startup voltage was 2.4V , The maximum luminance is 4950cd · m-2, the emission wavelength is 636nm, and the CIE coordinate is about (0.65,0.35) .This proves that the WO3 or MoO3 thin film as the modification layer can improve the hole injection at the ITO / BDPNTD interface, Device to achieve hole and electron balance.