A suitable chemical conversion route to synthesize ZnO/CdS core/shell heterostructures for photovoltaic applications

作者：Zhu, Y F^*; Fan, D H; Zhou, G H; Lin, Y B; Liu, L

来源：Ceramics International, 2014, 40(2): 3353-3359.

DOI：10.1016/j.ceramint.2013.09.097

• Nartostructures
• Semiconductors
• Chemical synthesis

In order to improve the performance of ZnO-based solar cells, ZnO/CdS core/shell heterostructures were synthesized via a facile chemical conversion route. Large area and quasi-aligned ZnO nanowire arrays were firstly fabricated on conductive glass substrates, and then the synthesis of ZnO/ZnS and ZnO/CdS heterostructures were realized by a chemical conversion method. The morphology and structure of the obtained products has been confirmed by field-emission scanning electron microscopy and X-ray diffraction measurements. The synthesized ZnO/CdS core/shell heterostructures were successfully applied in solar cells. The photovoltaic performance investigation demonstrates that the synthesized ZnO/CdS heterostructure-based solar cell shows a higher short-circuit current density compared with the N719 dye-sensitized ZnO nanowire array counterpart. The enhancement in current density may be due to the fact that the surface coverage of the light absorption layer in the ZnO/CdS core/shell heterostructure is very high. These results indicate that the synthesized ZnO/CdS heterostructures by the present method are very suitable for the application as photoelectrode in solar cells.

• 出版日期2014-3
• 单位五邑大学; 淮阴工学院