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A graphene oxide incorporated TiO2 photoanode for high efficiency quasi solid state dye sensitized solar cells based on a poly-vinyl alcohol gel electrolyte

机译:基于聚乙烯醇凝胶电解质的石墨烯氧化物掺入高效准固态染料敏化太阳能电池的TiO2光电氧化物

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摘要

An effective self assembly method was used to synthesize hybrid nanocomposites of TiO2 nanoparticles on graphene oxide (GO) sheets for application in Dye Sensitized Solar Cells (DSSCs). The successful incorporation of TiO2 on the GO sheets was confirmed by X-ray diffraction (XRD), Energy Dispersive X-ray (EDX), Raman and UV-visible spectroscopy. The morphology and size of the TiO2 nanoparticles on the GO sheets were analyzed by scanning electron microscope (SEM) and transmission electron microscope (TEM) analysis. This study is concerned with the effects of different GO contents of the photoanode on the energy conversion efficiency of the PVA gel electrolyte based DSSCs. DSSCs based on the GO@TiO2 nanocomposite photoanode with an optimum GO content of 2.5 wt% showed a short circuit current density (J(sc)) of 7.67 mA cm(-2), an open circuit voltage (V-oc) of 0.76 V and photoconversion efficiency of 3.97% which is much higher than that of the pure TiO2 nanoparticles.
机译:使用有效的自组装方法在石墨烯(GO)片材上合成TiO2纳米颗粒的杂化纳米复合材料,用于染料敏化太阳能电池(DSSC)。 通过X射线衍射(XRD),能量分散X射线(EDX),拉曼和UV可见光谱证实了在去纸上的TiO 2成功结合。 通过扫描电子显微镜(SEM)和透射电子显微镜(TEM)分析来分析Go纸上TiO2纳米颗粒的形态和尺寸。 该研究涉及光电码对PVA凝胶电解质基于DSSC的能量转换效率的不同GO含量的影响。 基于Go @ TiO2纳米复合电极的DSSCS具有最佳Go含量为2.5wt%,显示了7.67 mA cm(-2)的短路电流密度(j(sc)),开路电压(V-oc)为0.76 V和光电转换效率为3.97%,远高于纯TiO2纳米颗粒的效率。

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