Abstract
The near-infrared phosphor converted light-emitting diodes (NIR pc-LEDs) have been broadly used in the fields of night vision, biomedicine, nondestructive testing and food analysis. Over the past few years, many Cr3+ doped NIR phosphorus has been reported. However, the realization of ultra-broad band NIR emission with high quantum efficiency remains a great challenge. Here, we report an ultra-broadband NIR emitting phosphor Li3Sc1.92(PO4)3:0.08Cr3+ with a full width at half maximum (FWHM) of 240 nm. The reason for the ultra-broad emission band is that the host Li3Sc2(PO4)3 provides two different kinds of ScO6 octahedral sites for Cr3+ ions to occupy. This FWHM is better than most NIR emitting phosphors reported so far. Our research indicates that Li3Sc2(PO4)3:Cr3+ phosphors have great potential in night vision and NIR spectroscopy.
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