The Study Of Ethylene Vinyl Acetate Luminescent Film For Solar Cell

In this paper, a luminescent film for solar cell was prepared. The spectral sensitivity of solarcells significantly drops in the short-wavelength region, particularly in wavelength less than400nm. Therefore, the energy conversion efficiency of solar cells could be increased when theshort-wavelength region light was efficiently converted to longer wavelength fluorescence vialuminescent film. The steps of preparation are as follows:Firstly, salicylic acid （SA）, dibenzoyl methane （DBM）, acrylic acid （AA） and1,10-phenanthroline （phen） were used as doping agent to synthesis fluorescent Eu （Ⅲ） complex andthe fluorescence of the complex had been studied. The results showed that the scence intensity ofEu（DBM）₃phen was strongest.Secondly, the cross-linking system and ageing-resistant performance of EVA film wereinvestigated, a new EVA film with high light transmittance, strong adhensive property andexcellent ageing-resistant property was prepared successfully.At last, three kinds of luminescent films were prepared by blending ethylene vinyl acetate（EVA） with fluorescent Eu （Ⅲ） complex via a two-step process involving two-roll mixing andcompression moulding. The effect of the various factors such as fluorescent type and fluorescentcontent on the luminescent properties of EVA films was investigated in detail. The influence ofluminescent film on the energy conversion efficiency of solar cells was also studied. The resultsshowed that all the luminescent films could absorb UV light and convert to red light. TheEu（DBM）₃phen doped luminescent films displayed the best luminescent property among the threefilms, and it could improved the energy conversion efficiency of solar cells by10%.