【摘 要】
：
The microlens structure is pro-posed on macro photovoltaic glass substrate for high value-added micro-optic performance for thin film solar cell.The objective is to understand how the micro-optic beha
【机 构】
：
School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 51064
【出 处】
：
第13届全国博士生学术年会——新能源专题
论文部分内容阅读
The microlens structure is pro-posed on macro photovoltaic glass substrate for high value-added micro-optic performance for thin film solar cell.The objective is to understand how the micro-optic behavior of microlens array is related to indoor power conversion efficiency and outdoor electricity generation of thin film solar cell.First, the influences of microstructure size was theoretically analyzed on the absorption, reflection,scattering of light;then the mirror microgroove array with 500-800 μm in depth was precisely fabricated on by a CNC micro-grinding with micro diamond wheel Ⅴ-tip;finally, the electricity generation capacity and photovoltaic property related to the light intensity and incident angle were experimentally measured, respectively.It is shown that the diamond grinding is likely to fabricate precision and mirror micron-scale lens on glass surfaces.The microgroove lens structured surface is able to absorb and scatter the inclined light to solar cell for improving weak-light conversion efficiency against plane surface.The 800-m-depth micro-groove lens along with 50 mm in macro side enhances the electricity generation by 118-185% in cloudy and overcast days, respectively.The surprising finding is that the microgroove lens produces much larger electricity generation during cloudy day than during sunny day, but traditional plane surface does not do so.
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