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Anthocyanin from Vitis labrusca grape used as sensitizer in DSSC solar cells

机译:来自Vitis labrusca葡萄的花色苷在DSSC太阳能电池中用作敏化剂

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摘要

Dye sensitized solar cells or "Graetzel" cells are electrochemical devices capable of performing the direct conversion of light into electricity and are less expensive than traditional silicon solar cells. The most efficient dyes for Graetzel cells are those composed by the coordination compounds of ruthenium ions, which have high cost due to the shortage of ruthenium (Ru) element in the Earth's crust. Thus, the study of dyes with lower cost is crucial for the viability of this technology on a large scale. Natural dyes are easily extracted in addition to being environmentally friendly and presenting reduced cost. Anthocyanins are the most important pigments of vascular plants, providing color to the flowers and fruits. In grapes, anthocyanins are found exclusively in the skin and can be easily extracted with ethanol at room temperature. In this work we used the ethanolic extract of anthocyanins from Vitis labrusca grape in the sensitization of TiO_2 electrodes and production of a Graetzel cell. The prepared Graetzel cell presents a short-circuit current of 0.045 mA/cm~2, above that of the cell sensitized with commercial N719 dye, which was 0.032 mA/cm~2. However, the open circuit voltage was 0.293 V, lower than that sensitized with N719 (0.335 V). The fill factor of the anthocyanin sensitized cell was 46.19 %, higher than that of the N719 sensitized cell, 42.72 %. These results are consistent with the greater absorption of light radiation observed in the cell with grape anthocyanins in comparison with the cells sensitized with N719 dye.
机译:染料敏化太阳能电池或“ Graetzel”电池是能够执行将光直接转换为电能的电化学装置,并且比传统的硅太阳能电池便宜。对于Graetzel细胞来说,最有效的染料是由钌离子配位化合物组成的染料,由于地壳中的钌(Ru)元素不足,因而成本很高。因此,低成本研究染料对于大规模应用该技术至关重要。除了对环境友好并且降低成本外,天然染料还易于提取。花青素是维管束植物最重要的色素,为花朵和果实提供颜色。在葡萄中,花青素仅存在于皮肤中,在室温下很容易用乙醇提取。在这项工作中,我们使用了来自Vitis labrusca葡萄的花色苷的乙醇提取物来敏化TiO_2电极和生产Graetzel细胞。所制备的Graetzel电池的短路电流为0.045mA / cm〜2,高于被商业N719染料敏化的电池的短路电流为0.032mA / cm〜2。但是,开路电压为0.293 V,低于用N719敏化的电压(0.335 V)。花色素苷致敏细胞的填充因子为46.19%,高于N719致敏细胞的42.72%。这些结果与葡萄花色苷与用N719染料敏化的细胞相比在细胞中观察到的更大的光辐射吸收是一致的。

著录项

  • 来源
    《Journal of materials science》 |2015年第4期|2257-2262|共6页
  • 作者单位

    Chemistry Department, Universidade Estadual de Ponta Grossa (UEPG), 4748 Carlos Cavalcanti Avenue, Uvaranas, Ponta Grossa, Parana 84030-900, Brazil;

    Chemistry Department, Universidade Estadual de Ponta Grossa (UEPG), 4748 Carlos Cavalcanti Avenue, Uvaranas, Ponta Grossa, Parana 84030-900, Brazil;

    Chemistry Department, Universidade Estadual de Ponta Grossa (UEPG), 4748 Carlos Cavalcanti Avenue, Uvaranas, Ponta Grossa, Parana 84030-900, Brazil;

    Chemistry Department, Universidade Estadual de Ponta Grossa (UEPG), 4748 Carlos Cavalcanti Avenue, Uvaranas, Ponta Grossa, Parana 84030-900, Brazil;

    Physics Department, Universidade Estadual de Ponta Grossa (UEPG), 4748 Carlos Cavalcanti Avenue, Uvaranas, Ponta Grossa, Parana 84030-900, Brazil;

    Chemistry Department, Universidade Estadual do Centro-Oeste (UNICENTRO), 03 Simeao Camargo Varela de Sa Street, Carli, Guarapuava, Parana 85040-080, Brazil;

    Chemistry Department, Universidade Estadual de Ponta Grossa (UEPG), 4748 Carlos Cavalcanti Avenue, Uvaranas, Ponta Grossa, Parana 84030-900, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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  • 入库时间 2022-08-17 13:45:19

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