Journal
PROCEEDINGS OF THE SNEC 11TH INTERNATIONAL PHOTOVOLTAIC POWER GENERATION CONFERENCE & EXHIBITION
Volume 130, Issue -, Pages 72-76Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.egypro.2017.09.398
Keywords
Sol-gel; anti-reflection; photovoltaic glass; photovoltaic modules
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Antireflection coating for photovoltaic glass is very important for enhancing its optical transmittance, and ensuring a high light absorption and efficiency of PV modules. In this paper, a SiO2 coating with an excellent antireflection effect was realised with the sol-gel method, which is low cost and easily controlled. In our experiments, a silica (SiO2) sol was prepared by a sol-gel process and then the SiO2 coating was deposited on clean glass substrates by dip coating. The coatings were then annealed at 450 degrees C for 1 hour to increase the quality. Using an optimized type of catalyst and film thickness, the optical transmittance of the coated soda-lime glass could be increased by more than 5%. In addition, the influence of a catalyst (PF127) on the refractive index of the coating was evaluated. The experimental results showed that catalyst PF127 and a suitable heat treatment generate pores in the film which reduce the refractive index. The optimized single-layer SiO2 coatings on soda-lime glass substrates exhibited an average transmittance of 95% in the 300 to 1300 nm wavelength range. (C) 2017 The Authors. Published by Elsevier Ltd.
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