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Room temperature synthesis of graphene-platinum composite as counter electrode for efficient dye-sensitized solar cell

机译：室温合成石墨烯-铂复合材料作为高效染料敏化太阳能电池的对电极

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摘要

Graphene-platinum composites (GPs) with homogeneous decoration of Pt nanoparticles onto graphene sheets were synthesized via co-reduction of poly diallyl dimethyl ammonium chloride (PDDA) functionalized graphene oxide and Pt precursor by sodium borohydride (NaBH4) at room temperature. The photovoltaic performances of the as-prepared GPs as catalytic counter electrodes (CEs) of dye-sensitized solar cells (DSSCs) were examined. By simple modulation of Pt precursor dosage, the homogeneous distribution of Pt nanoparticles onto the graphene sheet with a considerable density and a minimal degree of aggregation is achieved, this structural feature is beneficial for improved electrocatalytic activity on I-3(-) reduction and efficient electrolyte diffusion channels. As a result, a maximal 6.08% photoelectric conversion efficiency (PCE) of the DSSC is achieved based on the GP CE, which is 5.71% higher than that of the Pt based counterpart.
机译：通过在室温下通过硼氢化钠（NaBH4）共同还原聚二烯丙基二甲基氯化铵（PDDA）官能化的氧化石墨烯和Pt前驱体，合成了在石墨烯片上均一装饰Pt纳米颗粒的石墨烯-铂复合材料（GPs）。检查了作为染料敏化太阳能电池（DSSC）的催化对电极（CE）的GP的光伏性能。通过简单地调节Pt前体的剂量，可以实现Pt纳米颗粒均匀分布在石墨烯片上，具有相当大的密度和最小程度的聚集，这种结构特征有利于提高I-3（-）还原反应的电催化活性并提高其效率。电解质扩散通道。结果，基于GP CE，DSSC的光电转换效率（PCE）最高达到6.08％，比基于Pt的同类产品高5.71％。

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