Characteristics of Functional Coating Films on Glass Substrates for Photovoltaic Modules According to the Coating Method Used

摘要

This study analyzes characteristics of anti-pollution functional coating films on glass substrates for PV modules that were coated using different methods and annealed using hot air fans. For the purpose of this study, antipollution functional coating films were applied on glass substrates made of the same material as the cover glass for PV modules. Each one of the following three coating methods: brushing, fabric and dipping was applied into separate specimens. Afterwards, all the films were rest in room temperature for 20 minutes and then annealed using hot air fans at 300 degrees C for 2 minutes. Specimens undergone both coating and annealing process were analyzed for their anti-pollution properties, contact angle, optical characteristics and other mechanical properties such as hardness and adhesion. Contact angle was analyzed using a contact-angle analyzer, and light transmittance was analyzed using UV-visible which is capable of utilizing the integrating sphere. Based on the results of this study, the most suitable coating method for hot-fan-annealed film was found. If the coating process proposed in this study is applied to PV modules production, improvement in anti-pollution characteristics as well as energy generation efficiency can be expected.