期刊
CHEMICAL ENGINEERING JOURNAL
卷 195, 期 -, 页码 307-313出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2012.04.081
关键词
ZnO; Nanospikes; Photoanode; Hydrothermal; Solar cells
资金
- National Research Foundation (NRF) for foreign researchers
- NRF Project [2011-0029527]
- Research Funds of Chonbuk National University
- National Research Foundation of Korea [과C6B1912, 2011-0029527] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This work reports the synthesis of nanospikes decorated ZnO sheets on the electrodeposited ZnO seeded fluorine doped tin oxide (FTO) substrates through the hydrothermal method at 90 degrees C and its application as photoanode for the efficient dye sensitized solar cells (DSSCs). The unique nanospikes decorated ZnO sheets were comprised of nanospikes with the average diameter of similar to 80-100 nm and the sheets of several nanometers. The ZnO nanospikes were decorated on either one side or the both side of the single ZnO sheets (thickness similar to 50-60 nm). The X-rays diffraction and UV-Vis spectroscopy results revealed that the grown nanospikes decorated ZnO sheets exhibited well crystalline with typical wurtzite hexagonal phase of ZnO nanostructures. A growth mechanism was proposed to investigate the formation of the grown nanospikes decorated ZnO sheets. The photoanode showed the relatively high dye absorption which was derived from the larger surface area of the grown nanospikes decorated ZnO sheets. The solar-to-electricity conversion efficiency of similar to 2.51% with the high short circuit current (J(SC)) of 6.07 mA/cm(2) was attained by DSSC fabricated with nanospikes decorated ZnO sheets photoanode. The enhanced performance might credit to the high charge collection and the fast electrons transfer at the interfaces of ZnO and the electrolyte layer due to the high dye absorption over the surface of ZnO leading to high light harvesting. (c) 2012 Elsevier B.V. All rights reserved.
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