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Duration and Metal Doping Effects on TiO2 Photoanodes on the Performance of Dye-Sensitized Solar Cells
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Abstract
En 中文
The TiO2 photoanode is crucial for the photovoltaic performance of dye-sensitized solar cells (DSSCs). Notably, the improved efficiency of TiO2 photoanodes through metal ion doping significantly depends on changes in their crystal structure, morphology, and optical properties. Therefore, this study explored the drying duration effect of hydrothermally grown TiO2 colloids (75-120 mins) to optimize the paste for doctor-blading TiO2 photoanodes. The analysis also investigated the impact of different 1 mol% metal dopants (Sr, Zn, Al, and Nb) on the photoanodes' crystal structure, morphology, optical properties, and DSSC efficiency. Each sample was synthesized using a modified and simplified hydrothermal strategy. The 120-min duration was then determined as the optimal drying duration for producing the highest device efficiency of 3.38% for the pristine TiO2 photoanode. This enhancement was attributed to improved crystallinity, a more rod-like and porous morphology, and a broader absorption range into visible wavelengths. Among the metal dopants, Nb significantly improved efficiency by 6.5%. In contrast, the other dopants adversely affected performance compared to the pristine TiO2 photoanode, which was related to the mixed rutile-anatase phase ratio. Consequently, this study effectively optimized TiO2 photoanodes in DSSCs regarding drying duration and metal doping variables based on a simplified hydrothermal approach.
Keywords:
Dye-sensitized solar cell
Photoanode
TiO2
Metal doping
Solar energy
Journal
I
IF:
0.7
Papers:
50
Citations:
548
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