Journal
THIN SOLID FILMS
Volume 717, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2020.138346
Keywords
Blocking Layer; Barium tin oxide; Dye-Sensitized Solar Cell; Sputtering
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The study investigated the efficiency enhancement of DSSCs using BaSnO3 thin film as BL, with 50nm thickness being the optimal value. The efficiency can be improved from 2.6% to 3.9% due to decreased electron recombination and increased electron lifetime at the FTO/BSO interface, resulting in better photovoltaic performance.
The efficiency of dye-sensitized solar cells (DSSCs) is limited by the recombination of electrons in fluorine-doped tin oxide (FTO) with the electrolyte species at the FTO/mesoporous semiconductor interface. This predicament can be addressed by employing a dense blocking layer (BL). Herein, we investigate the effects of BaSnO3 (BSO) thin film deposited by the radio-frequency sputtering method as a BL in BSO-based DSSCs. A range of thicknesses of up to 100 nm are examined, and it is shown that a thickness of similar to 50 nm is the optimum value for BL in BSO-based DSSCs. This BL can generate an efficiency enhancement of about 50% from 2.6% for bare BSO-based DSSC to 3.9% for the DSSC with a similar to 50 nm BL. This improvement is achieved by surpassing the recombination at the FTO/BSO interface and thus increasing the electron lifetime that results in a better photovoltaic performance.
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