Abstract
Synthesis and characterization of SrCrO4 activated with rare earth Nd3+ and Yb3+ is reported for the first time. Interesting luminescence properties have been observed for the synthesized phosphors. Host sensitized near infrared (NIR) emission is observed for Yb3+ doped phosphor which occurs as a result of cooperative energy transfer. Downshifted Nd3+ emission which is again in the NIR region can be excited by f-f transitions as well as by host absorption followed by energy transfer. The excitation spectra of these phosphors cover 350–500 nm region showing excellent overlap with solar spectrum that is not efficiently converted by c-Si solar cells. Emission is around 1 μm where photovoltaic conversion of c-Si is most efficient. These properties make them suitable as downshifting/downconversion phosphors for c-Si solar cells.
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