1. Controllable synthesis of hierarchical SnO2 microspheres for dye-sensitized solar cells.
- Author
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Wang, Yu-Fen, Li, Xi-Fei, Li, De-Jun, Sun, Yuan-Wei, and Zhang, Xian-Xi
- Subjects
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STANNIC oxide , *DYE-sensitized solar cells , *CHEMICAL synthesis , *CHEMICAL reactions , *X-ray diffraction - Abstract
Three-dimensional hierarchical SnO 2 microspheres were successfully synthesized through a rapid sonochemical reaction followed by a facile solvothermal process. The resultant samples were characterized in detail by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM). It was observed that the hierarchical SnO 2 microspheres (∼2.2 μm) consist of nanoparticles (∼23–30 nm). These samples are used to fabricate photoelectrodes for dye-sensitized solar cells (DSSCs). The effects of different samples on the photovoltaic performance were studied based on photocurrent-voltage ( J – V ), intensity-modulated photocurrent spectroscopy (IMPS) and intensity-modulated voltage spectroscopy (IMVS). It is found that the highest power conversion efficiency of 6.25% has been achieved based on the hierarchical SnO 2 microspheres film photoanode with thickness of ∼13.5 μm, and the corresponding photovoltaic parameters are 14.11 mA cm −2 in short-circuit current density, 803 mV in open-circuit voltage and 0.55 in fill factor, respectively. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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