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通过将氧化石墨烯(Graphene Oxide,GO)与十二烷基苯磺酸钠(Sodium Dodecyl Benzene Sulfonate,SDBS)作为填料混入聚3,4-乙撑二氧噻吩∶聚苯乙烯磺酸(PEDOT∶PSS)溶液中制备了高透光率和低方块电阻的透明导电薄膜。当氧化石墨烯与PEDOT∶PSS质量比为0.02%时,薄膜获得了最佳的导电率,电阻为85Ω/□,在550nm的光波长下透光率为87%。采用不同掺杂比例的薄膜作为电极制备了有机发光二极管(OLED)器件,相比于常用的ITO电极,复合薄膜作为阳极更有利于空穴的注入和传输,所制备的器件能够得到更优的性能。这些结果表明PEDOT∶PSS和氧化石墨烯复合电极有望取代柔性OLED器件中的ITO阳极。
By mixing Graphene Oxide (GO) and Sodium Dodecyl Benzene Sulfonate (SDBS) as fillers, poly 3,4-ethylenedioxythiophene: polystyrenesulfonic acid (PEDOT: PSS) solution prepared transparent conductive film with high transmittance and low sheet resistance. When the mass ratio of graphene oxide to PEDOT: PSS is 0.02%, the film has the best conductivity, the resistance is 85Ω / □, and the light transmittance is 87% under the light wavelength of 550nm. Organic light-emitting diode (OLED) devices are fabricated using thin films with different doping ratios as the electrodes. Compared with the commonly used ITO electrodes, the composite thin film as the anode is more conducive to the hole injection and transport, and the prepared device can obtain better performance. These results indicate that PEDOT: PSS and graphene oxide composite electrodes are expected to replace the ITO anode in flexible OLED devices.