Aplicação de Filmes Finos Texturizados para o Incremento da Conversão Energética de Painéis Fotovoltaicos

Abstract

Photovoltaic energy has been emerging as an alternative energy source, which arouses interest in methods that can increase the energy conversion of photovoltaic panels in order to reduce the cost of solar energy generation. In this paper, we propose a surface treatment methodology for commercial polycrystalline silicon photovoltaic panels of the Aiyma model with dimensions 19mm for 39mm with efficiency of 17% and maximum voltage of 0, 5V . Therefore, thin films deposited on glass substrates (microscope slide), with dimensions of 26mm for 76mm, were used by immersion coating and subsequently submitted to the chemical grinding process, with the times of 0s, 4s, 512s, and 1024s, for forming different roughness on its surface resulting in nanostructures. Such nanostructures give the 512s etching transmittance sample up to 99, 70% in the visible spectral range due to the gradual refractive index generated at the air-film interface, while flat glass has a transmittance of 94, 45%, in the same wavelength range. The flat glass substrate encapsulated photovoltaic panels, with and without deposited thin film, were subjected to electrical measurements in order to determine the photovoltaic parameters, which for the 512s thin film photovoltaic panel obtained circuit potential difference. open Voc of 0, 45V , short circuit current Isc of 8, 95mA and which were used to calculate the FF fill factor of 0, 58 which, in turn, is the energy conversion measure of the panel. The parameters obtained for the bare glass photovoltaic panel (CSF) were Isc 9, 26mA Voc 0, 42V and an FF of 0, 54. The 512s thin-film photovoltaic panel achieved a larger Voc and an FF than the bare panel and therefore an increase in the photovoltaic panel’s energy conversion.