Mechanical Properties of Flexible Thin-film Solar Cells and Its Applied Research in Membrane Structure

With the continuous development of building-integrated photovoltaic, solar cells no longer just be the additional items of building structures. In growing number of modern architectural structures, solar cells combined with the structural elements have gradual emerged. And these applications make the solar cells will inevitably accepted the stress which from structural elements .Therefore, studying the electro-optical properties changes of solar cells under the influence of stress have begun to appear particularly important.This paper choosed two kinds of representative flexible thin-film solar cells for material analysis,one kind is flexible organic thin-film solar cells and another is amorphous silicon thin-film solar cells.Then we proposed a simplified mechanical model after the material analysis. And, mechanical properties and optical properties under different strain directions of the two types of flexible thin-film solar cells were studied through the tensile test. The results show that flexible organic thin-film solar cells is superior to the mechanical properties of flexible amorphous silicon thin-film solar cells. And stretched in different directions when the electro-optical properties of two types of cell changes also have obvious difference.In this paper, membrane structure is a kind of architectural structure to be the research vehicle. First, according to the mechanical properties of membrane PVDF and flexible thin-film solar cells to proposed two different composite mode. And, mechanical properties and optical properties under different strain directions of the composite flexible thin-film solar cells were studied through the same tensile test of the experimental methods. The results show that the electro-optical properties are different between the composite flexible thin-film solar cells before and after. At last, we comparative analysed and summarized the test findings and put forward a stress control formula of integrated design of the flexible thin-film solar cells and membrane structure.After all, according to the conclusions of previous work in this paper, we designd and installed an umbrella shape building-integrated photovoltaic membrane structure of which covers an area about 10m~2 .