基于氧化石墨烯功能材料提高PEDOT:PSS电极特性研究  

Improved property of PEDOT:PSS anode using graphene oxide function material

作　　者：郭阳阳 王文军[1,2] 李淑红 刘云龙[1,2] 刘婷婷 赵玲[1,2] 王青如 高学喜 GUO Yang-yang;WANG Wen-jun;LI Shu-hong;LIU Yun-long;LIU Ting-ting;ZHAO Ling;WANG Qing-ru;GAO Xue-xi(School of Physical Science and Information Technology ,Liaocheng University,Shandong 252059,China;Shandong Provincial Key Laboratory of Optical Communication Science and Technology ,Shandong 252059)

机构地区：[1]聊城大学物理科学与信息工程学院,山东聊城252059 [2]山东省光通信科学与技术重点实验室,山东聊城252059

出　　处：《光电子．激光》2019年第7期697-703,共7页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61775089);山东省重点实验室产业联盟基金(SDKL2016038);山东省自然科学基金(ZR2017BF009)资助项目

摘　　要：基于聚(3,4-乙烯二氧噻吩)-聚苯乙烯磺酸(PEDOT:PSS)/氧化石墨烯(GO)混合溶液,利用旋涂法制备了高电导率透明阳极,并采用硫酸(H2SO4)浸渍处理的方式,使其导电特性进一步增强。采用最佳方式处理的PEDOT:PSS/GO混合薄膜在厚度为40 nm时,其方阻为80Ω/,在550 nm时的透过率达到87.7%。基于表面形貌的AFM图,吸收光谱和拉曼光谱,在少量氧化石墨烯掺杂和硫酸处理后,PSS-和PEDOT+链相分离,使得PEDOT:PSS的结构发生了变化,提高了混合薄膜的电导率。与ITO和纯PEDOT:PSS分别作为阳极的OLED器件相比,采用优化的PEDOT:PSS/GO混合薄膜作为阳极时的OLED器件具有最低的启亮电压和最高的电流效率,其最大亮度是纯PEDOT:PSS作为阳极的OLED的1.7倍。较高的透过率,电导率和HOMO能级,尤其是表面形貌的改变都有利于PEDOT:PSS/GO阳极OLED器件性能的改善。A highly conductive transparent anode was fabricated by solution method based on poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)/graphene oxide(GO) hybrid film by sulfuric acid(H2SO4) treatment.The optimal treated PEDOT:PSS/GO films reach a sheet resistance of 80 Ω/□ per square and a high transmittance of 87.7% at 550 nm.Based on the atomic force microscopy,absorption and Raman spectrum,the structures of PEDOT:PSS was changed after the small amount of GO doping and H2SO4 treatment,which led to the separation of PSS and PEDOT chains and the enhancement of the conductivity of hybrid films.The ITO free OLEDs fabricated with the optimized PEDOT:PSS/GO film as anode has the lowest turn-on voltage and highest current efficiency in comparison with ITO anode and pure PEDOT:PSS anode based OLEDs.At the same time,the brightness of OLEDs with the optimized hybrid film anode is 1.7 times higher than that of OLEDs with pure PEDOT:PSS anode.All of the higher transmittance,higher conductivity and higher HOMO levels,especially the variation of topography,ascribed to the improved efficiency of OLEDs with hybrid film anode.

关 键 词：柔性OLED 氧化石墨烯功能材料 PEDOT:PSS/GO混合薄膜 混合阳极 电流效率 

分 类 号：TN383.1[电子电信—物理电子学]