期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 677, 期 -, 页码 211-218出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.03.219
关键词
ZnO-TiO2; Sol-gel; X-ray diffraction; Nanowire arrays; Photoluminescence; Dye sensitized solar cell
资金
- University Grants Commission (UGC), New Delhi
ZnO nanowire arrays (NWAs) were synthesized on ZnO-TiO2 mixed oxide seeded FTO conducting glass plate by two-step sol-gel and hydrothermal method, respectively. X-ray diffraction patterns reveal the presence of mixed and hexagonal phases in seed layer and NWAs, respectively. Scanning electron microscope images showed that the FTO glass plate is uniformly covered with grains and a few nanorods in seed layer and dense NWAs are vertically grown on the seed layer. The hexagonal structure and high crystal quality have been confirmed by micro Raman spectra. Photoluminescence spectra also present that NWAs have high crystal quality and less atomic defects. UV spectra indicate that NWAs are absorbed more dye molecules and it has the band gap equal to bulk material. The efficiency of ZnO-TiO2 mixed oxide seed layer and ZnO NWAs is found to be 0.56 and 0.84% respectively. Electrochemical impedance spectra reveal that NWAs DSSC has high charge transfer recombination resistance than the seed layer DSSC. (C) 2016 Elsevier B.V. All rights reserved.
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