期刊
THIN SOLID FILMS
卷 556, 期 -, 页码 503-508出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2014.01.008
关键词
Dye-sensitized solar cells; Recombination; Tin dioxide; Blocking layer; Tin chloride treatment
类别
资金
- Basic Science Research Program [2009-0094038]
- Pioneer Research Center Program through the National Research Foundation of Korea (NRF) [2010-0019469]
- Ministry of Education, Science and Technology
- National Research Foundation of Korea [2010-0019469] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
An ultrathin SnO2 layer was introduced as a blocking layer in dye-sensitized solar cells (DSSCs) for improving conversion efficiency. The SnO2 blocking layer, composed of approximately 10 nm nanoparticles, was deposited on the fluorine-doped tin oxide (FTO) coated glass by SnCl4 treatment, a simple and inexpensive method. This SnO2 blocking layer increased the onset of dark current from FTO to electrolyte, suppressing charge recombination at the FTO/electrolyte interface. The cascading band structure of TiO2 and SnO2 increased the charge carrier lifetime, resulting in effective charge collection. Examining DSSC performance as a function of SnCl4 treatment time, a peak conversion efficiency of 7.33% was achieved for a SnCl4 treatment time of 15 min (SnO2 layer thickness similar to 12 nm), compared to 6.08% for an untreated cell. Also, compared to a TiO2 blocking layer, the SnO2 blocking layer showed a higher performance. (C) 2014 Elsevier B.V. All rights reserved.
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