Abstract
CaAlSiN3:Eu2+ (CASN) and Y2O3:Eu3+ (YO) phosphors are mixed into ethyl vinyl-acetate (EVA) to form luminescence down-shifting (LDS) films which are used to improve crystalline silicon solar cells by converting the photons with the wavelength from 200 nm to 500 nm into red light. Experimental results show that the conversion efficiency of the solar cells is enhanced from 19.61% to 20.00%. The improvement is better than that with only CASN phosphors in EVA films. The reason is the high quantum yield of YO phosphors in the wavelength range 250 nm-350 nm, which offsets the poorer performance of CASN phosphors in this wavelength range.
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