有机酸修饰ITO对OLED器件性能的影响  

Effects of Modified ITO Using Organic Acids on the Performance of OLEDs

作　　者：胡俊涛[1,2] 杨劲松[1,2] 冯鹏[1,2] 梅文娟[1,2] 牛永鹏 

机构地区：[1]特种显示技术国家工程实验室特种显示技术教育部重点实验室省部共建现代显示技术国家重点实验室,合肥230009 [2]合肥工业大学光电技术研究院,合肥230009 [3]中航华东光电有限公司,安徽芜湖241002

出　　处：《半导体光电》2017年第1期16-20,共5页Semiconductor Optoelectronics

基　　金：国家"863"计划项目(2012AA011901);科技部"973"计划前研专项项目(2012CB723406);国家自然科学基金项目(51573026);中航工业产学研专项项目(CXY2013HFGD20)

摘　　要：分别采用二氯苯氧乙酸和溴乙酸对ITO表面进行修饰,研究其对OLED器件(ITO/PVK/FIrPic∶SimCP/TPBi/LiF/Al)性能的影响。结果显示,相较于未修饰的器件,采用二氯苯氧乙酸修饰后的器件最大亮度由673.4cd/m2提升至1 875.2cd/m2,同时器件的启亮电压由6.2V降至5.3V。研究发现,有机酸处理能够改变ITO的表面能和功函数,一方面改变ITO和后续膜层的接触性能,影响后续膜层的成膜;另一方面也可以有效减少ITO与有机层间的势垒,提升载流子注入。这种用有机酸修饰ITO阳极的方法工艺简单,能有效降低空穴注入势垒,优化ITO和有机层的接触性能,对器件性能的提升起到一定的促进作用。The performance of OLED devices（ITO/PVK/FIrPic∶SimCP/TPBi/LiF/Al）was studied by making modification of ITO surface with bromoacetic acid and 2,4-Dichlorophenoxyacetic acid,respectively.The results show that,compared with the devices without organic acid modification,the maximum brightness of the device increases from 673.4to1 875.2cd/m^2,while the turn-on voltage of the device reduces from 6.2to 5.3V.It is considered that the organic acids can change the surface energy and the work function of ITO.On the one hand,it changes the contact performance of the ITO and the subsequent film,influencing the subsequent coating film;on the other hand,it effectively reduces the barrier between the ITO and organic layer,improving the carrier injection.This method is simple and effective in reducing the hole injection barrier and proving the contact performance of the ITO and the subsequent film,which plays a certain role in promoting the devices＇ performance.

关 键 词：ITO 有机酸 表面能 功函数 OLED 

分 类 号：TN312.8[电子电信—物理电子学]