Optimization of Self-Cleaning Thin-Film Layer for Photovoltaic Applications
2020
To improve the productivity of a photovoltaic (PV) module, TiO(2) thin films of different thicknesses were applied as a self-cleaning layer on soda-lime glass and a Si PV module by spray-coating a TiO(2) solution. The structural, optical, and wettability characteristics of the TiO(2) thin films were investigated with respect to the thickness. Thermogravimetric-differential thermal analysis, X-ray diffraction, field-emission scanning electron microscopy, contact-angle analysis, ultraviolet-visible spectroscopy, atomic force microscopy, Fourier transform infrared spectroscopy, and a solar simulator were used to analyze the prepared TiO(2) thin films. The optimal thickness was determined to be 100 nm. The TiO(2) thin film exhibited a self-cleaning ability even after post-annealing at 250 degrees C. After the self-cleaning ability was confirmed, the TiO(2) thin film was applied to the PV module.
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