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中文摘要：
以DPVBi为发光层,NPB为空穴传输层,在阳极ITO和NPB之间分别插入不同的空穴注入层CuPc和PEDOT∶PSS,制备了两种结构的蓝色有机电致发光器件（OLEDs）：ITO/CuPc/NPB/DPVBi/BCP/Alq3/Al和ITO/PEDOT∶PSS/NPB/DPVBi/BCP/Alq3/Al,研究了不同空穴注入材料对蓝色OLEDs发光性能的影响,并与没有空穴注入层的器件进行了比较。其中CuPc分别采用旋涂和真空蒸镀两种工艺,比较了不同成膜工艺对器件发光特性的影响。结果表明：加入空穴注入层的器件比没有空穴注入层器件性能要好,其中插入水溶性CuPc的器件,其发光亮度和效率虽然比蒸镀CuPc器件要低,但比插入PEDOT∶PSS器件发光性能要好。又由于水溶性CuPc采用旋涂工艺成膜,与传统CuPc相比,制备工艺简单,所以为一种不错的空穴注入材料。
英文摘要：
The present work investigates the effects of different buffer layers on the performance of blue organic light-emitting diodes（OLEDs）,and compares them with the device with no buffer layer.Two kinds of blue OLEDs with 4,4＇-bis（2,2＇-diphenyl vinyl）-1,1＇-biphenyl（DPVBi） as the emitting layer,N,N＇-bis-（1-naphthyl）-N,N＇-1-diphenyl-1,1＇-biphenyl-4,4＇diamine（NPB） as the hole transporting layer,and copper phthalocyanine（CuPc） and poly（3,4-ethylenedioxythiophene）∶poly（styrenesulphonate） PEDOT∶PSS as the hole injection layer respectively were fabricated with the structures of ITO/CuPc/NPB/DPVBi/BCP/Alq3/Al and ITO/PEDOT∶PSS/NPB/DPVBi/BCP/Alq3/Al.Moreover,the effects of different preparation technology of CuPc on the performance of OLEDs were also investigated.It was found that the performance of the devices with a hole injection layer is better than that of the device without any hole-injection layer.Although the luminance and efficiency of the water-soluble CuPc based device are worse than that of the device with thermally evaporated CuPc,but better than that of the device with water-soluble PEDOT∶PSS.So the water-soluble CuPc is a good hole injection material because it is easier to fabricate the film than traditional CuPc.
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