da Silva Luciano, Freeman Harold
Departamento de Procesos de Transformación de Plásticos, Centro de Investigación en Quimica Aplicada, Saltillo, CP 25294, Mexico.
Polymer and Color Chemistry Program, North Carolina State University, Raleigh, NC 27695, USA.
Phys Chem Chem Phys. 2019 Aug 14;21(30):16771-16778. doi: 10.1039/c9cp02439e. Epub 2019 Jul 22.
Three compounds based on the phenyltetrazole system, 5-(4-hydroxyphenyl)tetrazole (LTz-1), 5-(4-methoxyphenyl)tetrazole (LTz-2) and 5-(4-hexyloxyphenyl)tetrazole (LTz-3), were synthesized and characterized as co-adsorbents in dye-sensitized solar cells (DSSCs). The effects of hydrophobic chain length of the co-adsorbent and the effects of tetrazole anchoring group on the properties of DSSCs containing the previously reported dye HD-2 were compared with the benchmark deoxycholic acid (DCA). The charge-transfer resistance of the dye/TiO interface followed the order HD-2-DCA > HD-2-LTz-2 > HD-2-LTz-3 > HD-2-LTz-1. However, the V of the dye HD-2 with co-adsorbent DCA was 0.66 V, for the dye HD-2 with co-adsorbent LTz-1, it was 0.70 V, for the dye HD-2 with co-adsorbent LTz-2, it was 0.68 V and for the dye HD-2 with co-adsorbent LTz-3, it was 0.67 V. Co-adsorbents LTz-1, LTz-2 and LTz-3 achieved a mean solar-to-power conversion efficiency (%η), for the three devices, of 8.29, 7.63 and 8.49, respectively, compared to 7.76 for DCA under the same experimental device conditions. For the LTz-3 co-adsorbent, the results can be attributed to the repellent effect of the long alkyl chain. For LTz-1 and LTz-2 co-adsorbents, it is possible that the more compact layer formed improves electron-injection efficiency into TiO.
合成了三种基于苯基四唑体系的化合物，即5-(4-羟基苯基)四唑(LTz-1)、5-(4-甲氧基苯基)四唑(LTz-2)和5-(4-己氧基苯基)四唑(LTz-3)，并将其表征为染料敏化太阳能电池(DSSCs)中的共吸附剂。将共吸附剂的疏水链长度的影响以及四唑锚定基团对含有先前报道的染料HD-2的DSSCs性能的影响与基准脱氧胆酸(DCA)进行了比较。染料/TiO界面的电荷转移电阻遵循HD-2-DCA>HD-2-LTz-2>HD-2-LTz-3>HD-2-LTz-1的顺序。然而，染料HD-2与共吸附剂DCA的V为0.66 V，染料HD-2与共吸附剂LTz-1的V为0.70 V，染料HD-2与共吸附剂LTz-2的V为0.68 V，染料HD-2与共吸附剂LTz-3的V为0.67 V。在相同的实验装置条件下，共吸附剂LTz-1、LTz-2和LTz-3分别使三个器件的平均太阳能到功率转换效率(%η)达到8.29、7.63和8.49，而DCA为7.76。对于LTz-3共吸附剂，结果可归因于长烷基链的排斥作用。对于LTz-1和LTz-2共吸附剂，形成的更致密层可能提高了电子注入TiO的效率。
