期刊
APPLIED SURFACE SCIENCE
卷 434, 期 -, 页码 1144-1152出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.11.075
关键词
Dye-sensitized solar cell; ZnO; Hydrophobic; Surface effect; Interfacial recombination
类别
资金
- Training Project of Youth Science and Technology Innovation Talents of Xinjiang Uygur Autonomous Region [QN2016YX0036]
- National Natural Science Founation of China [51662037, 21363023, 21563029]
Charge recombination at the ZnO photoanode/electrolyte interface is one of the major limitations for high performance dye-sensitized solar cells (DSSCs) toward their theoretical power conversion efficiency (PCE). Here, we proposed an efficient approach for reducing this interfacial losses and consequently facilitating charge transfer by decorating a hydrophobic thin-film on the surface of the dye-coated zinc oxide photoanode via 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane (PFDTES) hexane solution immersing. As a result, a high PCE of 8.22% was obtained, which far exceeded the efficiency of 5.40% in a conventional DSSC without PFDTES treatment. Furthermore, PFDTES treatment also largely elongated the lifetime of photogenerated electrons, and maintained a good photo-response at the photoelectrode. This work provides a comprehensive explanation of electron injection, transfer and recombination at the ZnO photoanode/electrolyte interface, and a promising strategy to explore high efficiency ZnO-based DSSCs. (C) 2017 Elsevier B.V. All rights reserved.
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