State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
J Colloid Interface Sci. 2013 Mar 1;393:58-65. doi: 10.1016/j.jcis.2012.10.035. Epub 2012 Oct 26.
Well-aligned CdS nanorod arrays (CdS NRs) with ~100 nm in diameter and ~700 nm in length were fabricated on FTO (fluorine-doped tin oxide) substrate by using glutathione as capping agents. The growth of CdS NRs was studied in details by exploring the roles of each active binding group in glutathione. The thiol group in glutathione plays an important role in forming a compact CdS nanocrystal film, upon which the nanorods grow subsequently via the synergetic effect of thiol and dicarboxyl groups in glutathione. The influence of surface passivation with glutathione on the photoelectrical property of CdS NRs was also tested. The results revealed that glutathione ligands encapsulated in the surfaces of CdS NRs act as insulating barriers between CdS NRs and solution, hindering charge transport. Hybrid photovoltaic cells of FTO/CdS NRs/P3HT (poly(3-hexylthiophene))/Au were then assembled. The performance of the photovoltaic devices was increased with increasing the length of the as-prepared CdS nanorods and further enhanced to the highest efficiency of 0.373% after the thermal sulfuration treatment.
在 FTO（掺氟氧化锡）基底上，使用谷胱甘肽作为帽盖剂，制备出了直径约为 100nm、长度约为 700nm 的排列整齐的 CdS 纳米棒阵列（CdS NRs）。通过探索谷胱甘肽中每个活性结合基团的作用，详细研究了 CdS NRs 的生长过程。谷胱甘肽中的巯基在形成致密的 CdS 纳米晶薄膜中起着重要作用，纳米棒随后通过谷胱甘肽中的巯基和二羧基基团的协同作用生长。还测试了谷胱甘肽表面钝化对 CdS NRs 光电性能的影响。结果表明，CdS NRs 表面包裹的谷胱甘肽配体在 CdS NRs 和溶液之间充当绝缘势垒，阻碍电荷传输。然后组装了 FTO/CdS NRs/P3HT（聚（3-己基噻吩））/Au 混合光伏电池。随着所制备的 CdS 纳米棒长度的增加，光伏器件的性能得到提高，经过热硫化处理后，效率提高到最高的 0.373%。
