Study On The Preparation Of Cover Materials And Their Application On Solar Cell Modules

Solar cell as a device which can transfer the sustainable solar energy into electricity is the ideal choice to replace the fossil energy. Energy conversion efficiency improvement and cost decrease are the key factors to promote the application of solar cells. In order to improve the efficiency, a lot of researchers concentrate on the antireflection structure development of solar cells. Considering the important role of antireflection cover materials in the efficiency improvement of solar cells, a lot of researches have been done in our work.In our work, we obtained a uniform porous layer in large area as the antireflection (AR) layer on the surface of low iron solar glass by chemical etching in hot alkali (NaOH) solution. Based on the optimization of reaction parameters, a highest transmittance of98.2%and an optimized average of97.24%at the visible range were observed after reacting at97℃,0.05M NaOH solution for90min. As a result, AR layer owned hydrophilicity property and became superhydrophobicity after modification. The adhesive property was also improved by silane coupling agent. Finally,3.2%increase of energy conversion efficiency from17.62%to18.19%in the module with the optimized etched glass was achieved. As an easy and low cost way to obtain antireflection layer on the surface of glass, chemical etching has a great practical application value.In addition, we combined ethylene-tetrafluoroethylene (ETFE) films and carbon fiber-reinforced polymer sheets together to obtain solar cell modules with high energy conversion efficiency, light and foldable properties. As a result,1.45%increase of energy conversion efficiency and59.5%decrease of the weight of the module with ETFE films were achieved.