Luminescence of (Ca,Sr)3(VO4)2: Pr3+, Eu3+ phosphor for use in CuPc-based solar cells and white light-emitting diodes

The purpose of this study is to enhance the red emission intensity and expand the blue excitation band of a (Ca,Sr)2.82(VO4)2:0.12Eu3+ phosphor for use in copper phthalocyanine (CuPc)-based solar cells and white light-emitting diodes. It was found that substitution of 3% Sr2+ replacing Ca2+ enhanced red emission intensity of Ca2.82(VO4)2:0.12Eu3+ by 14% under 465-nm by excitation. The Pr3+ co-doping effect was realized when blue excitation intensity of (Ca0.97Sr0.03)2.82(VO4)2:0.12Eu3+, located in the weakest absorption of CuPc, was improved by 126% with the addition of 0.6 mol% Pr3+. The absorption spectrum of CuPc/optimized (Ca0.9668Sr0.03)2.82(VO4)2:0.006Pr3+, 0.12Eu3+ mixtures provided evidence that the (Ca0.9668Sr0.03)2.82(VO4)2:0.006Pr3+, 0.12Eu3+ phosphor could increase the efficiency of incident photons on CuPc-based solar cells. Moreover, the good temperature stability of emission intensity and chromaticity of (Ca0.9668Sr0.03)2.82(VO4)2:0.006Pr3+, 0.12Eu3+ indicated a potential for this phosphor to be applied on the white light-emitting diodes.