【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。更多还原

【Abstract】 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.更多还原