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  • Title: The role of glutathione on shape control and photoelectrical property of cadmium sulfide nanorod arrays.
    Author: Yang C, Liu S, Li M, Wang X, Zhu J, Chong R, Yang D, Zhang WH, Li C.
    Journal: J Colloid Interface Sci; 2013 Mar 01; 393():58-65. PubMed ID: 23168043.
    Abstract:
    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.
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