Abstract
The objective of this present study is to manufacture a new silicone-based adhesive which is used for gluing and bonding the second optical elements (SOE) with Concentrating Photovoltaic solar cell (CPV) in order to guarantee a thickness that can provide a good silicone adherence to obtain long term stability and keeping a good solar transmittance performance, too. This new adhesive is made up of a mixture of silicone and transparent glass balls. The experimental part consists of the choice of the best size of glass balls with the suitable proportion of the glass balls weight in the mixture. For this purpose, ten samples were manufactured for every category of glass balls and weight ratio. Glass ball sizes between 100 and 1100 μm, and weight ratios between 1 and 10% were analyzed. For each category of glass balls, four proportions were mixed with the silicone. The thicknesses and transmittance of every sample were measured with appropriate instruments. The experimental results illustrate that the mixture containing balls with sizes inferior to 106 μm, is the best mixture which assures adhesive minimum thickness value necessary for an efficient mechanical bond and preserves also a good transmittance of solar irradiance.
Highlights
IntroductionConcentrator photovoltaic systems (CPV) are used to increase the im-
The objective of this present study is to manufacture a new silicone-based adhesive which is used for gluing and bonding the second optical elements (SOE) with Concentrating Photovoltaic solar cell (CPV) in order to guarantee a thickness that can provide a good silicone adherence to obtain long term stability and keeping a good solar transmittance performance, too
In this work a new adhesive situated between solar cell and secondary optical elements has been manufactured
Summary
Concentrator photovoltaic systems (CPV) are used to increase the im-. CPV systems convert solar energy to electric energy by concentrating the incident solar radiation on high efficiency multi-junction (MJ) solar cells. A typical CPV system consists of a solar concentrator, MJ solar cells and a sun tracking system [2]. A concentrated photovoltaic system CPV is composed of a Primary Optical Element POE, a Secondary Optical Element SOE and a solar cell. The role of POE is to concentrate a large area of solar energy into a small solar cell. The SOE is applied to redirect the sun light into the solar cell and to distribute the energy uniformly on the solar cell [3] [4]
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