Journal
JOURNAL OF POWER SOURCES
Volume 268, Issue -, Pages 670-676Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.06.104
Keywords
Titanium dioxide quantum dots; Underlayer; Photovoltaic performance; Dye-sensitized solar cell
Funding
- National Natural Science Foundation of China [U1205112, 51002053]
- Chinese Ministry of Education [212206]
- Programs for Prominent Young Talents and New Century Excellent Talents in Fujian Province University
- Promotion Program for Yong and Middle-aged Teacher in Science and Technology Research of Huaqiao University [ZQN-YX102]
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Well crystalline TiO2 quantum dots with size about 3.6 nm are synthesized and used to fabricate high performance underlayers in dye-sensitized solar cells (DSCs). The TiO2 quantum dots underlayer (TiO2-QD-UL) covered FTO glasses show excellent transmittance as that of the non-covered one. The TiO2-QD-UL can efficiently suppress dark reaction in the cell by increasing the onset bias voltage for generating dark current to a higher value and shifting flat-band potential of the photoanodes to a more negative position. Moreover, the shorten electron transport time, lengthen electron life time, enhanced charge collection efficiency, and the decreased electron transport resistance between TiO2/FTO glass are obtained with TiO2-QD-UL in the cell. Power conversion efficiency of the DSC with TiO2-QD-UL in the photoanode is enhanced from 7.10% to 9.43%, corresponding to 32.82% increment. (C) 2014 Elsevier B.V. All rights reserved.
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