Abstract

To synthesize a white light-emitting phosphor, Dy3+, a rare earth ion, was added to synthesize crystalline CaMoO4 at room temperature by co-precipitation. In the synthesized powder, the main peak of the (112) plane was clearly observed in the x-ray diffraction pattern, and it was observed that the lattice constant was changed by the addition of the Dy3+ ions. The synthesized phosphor showed a strong absorption in the ultraviolet region and both blue light emission from the host and yellow light emission by the Dy3+ ions and cold white light emission. A flexible composite was prepared by mixing the synthesized phosphor powder with a PDMS polymer. It showed white light emission when placed on a UV-LED with an applied voltage, suggesting that it can be used as an LED color filter.

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