超薄层BCP对有机电致发光器件性能的影响  

Effect of an Ultrathin BCP Layer on Organic Light-emitting Devices Performance

作　　者：唐晓庆[1] 于军胜[1] 李璐[1] 马涛[1] 文雯[1] 蒋亚东[1] 

机构地区：[1]电子科技大学光电信息学院电子薄膜与集成器件国家重点实验室,四川成都61005

出　　处：《发光学报》2008年第2期253-258,共6页Chinese Journal of Luminescence

基　　金：国家杰出青年基金(60425101);教育部新世纪优秀人才计划(NCET-06-0812);电子科技大学中青年学术带头人计划(060206)资助项目

摘　　要：采用真空热蒸镀的方法,在常规的双层器件结构的基础上,设计了三层双异质结有机电致发光器件(OLED):indium-tin oxide(ITO)/N,N′-diphenyl-N,N′-bis(1-naphthyl)(1,1′-biphenyl)-4,4′-diamine(NPB)/2,9-dimethyl-4,7-diphenyl-1,10-phenan throline(BCP)/8-hydroxyquinoline aluminum(Alq3)/Mg∶Ag。通过对器件的电致发光(EL)光谱及器件性能的表征,研究了不同超薄层BCP的厚度对OLED器件性能的影响。结果表明,当超薄层BCP的厚度从0.1nm逐渐增加到4.0nm时,器件的EL光谱实现了绿光→蓝绿光→蓝光的变化;BCP层有效地调节了载流子的复合区域,改变了器件的发光颜色,提高了器件的亮度和发光效率。Organic light-emitting diodes （OLEDs） have been intensively studied in the past several years due to their unique image quality and potential commercial application in flat-panel displays. Since Tang and Van Slyke reported the first double-layer green thin-film OLED with high brightness and low driving voltage, the OLEDs have demonstrated their good prospect around the world for this new display technology. The distinguished characteristics of OLEDs for displays include power on consumption and potentially low cost. versatility in substrates, render them suitable for high efficiency, wide viewing angle, fast response time, low In addition, their low processing temperatures, and thus some novel display applications, such as flexible displays.Over the past decade, the OLED display technology has made rapid progress; the major technical issues associated with these advanced OLED structures in general are how to design their optical structures and how to choose suitable materials with required electrical and optical properties. To achieve further advances in the brightness, power efficiency and the color purity of the electroluminescent spectrum of OLEDs, it will be necessary to develop new materials and design suitable device structures with long-term stability and lifetime. The mechanism for electroluminescent （EL） phenomenon involves in the injection of holes from anode and electrons from cathode under forward bias voltage, then the hole-electrons from excitons, and light emission appears through the radiative recombination of excitons. In order to obtain optimal luminance and power efficiency, organic electroluminescence requires the effective injection and recombination of the electrons and holes, and the injection balance of the electron and hole. Therefore, the reasonable device structures and the choice of the function materials of the OLEDs play the important role to improve the brightness, power efficiency and the device＇s stability. Based on conventional two-layer devices, the double heterostru

关 键 词：有机电致发光器件(OLED) 超薄层 BCP 器件性能 

分 类 号：TN383.1[电子电信—物理电子学] TN873.3