ALL-INORGANIC MULTI-COLOR CONVERTER BASED ON EU3+-DOPED PHOSPHOR-IN-GLASS FOR WHITE LIGHT-EMITTING DIODES

摘要

We proposed an all-inorganic multi-color converter based on Eu~(3+)-doped phosphor-in-glass (PiG) for high-power white light-emitting diodes (WLEDs). The Eu~(3+)-doped PiG was fabricated by screen-printing and low-temperature sintering a green phosphor into a Eu~(3+)-doped glass matrix, which was prepared by a lead-free and low-melting glass frit doped with Eu~(3+) ions. When the Eu~(3+) doping content increases from 0.5 to 5 mol%, the transmittance of Eu~(3+)-doped glass matrix is reduced while the red emission intensity is increased. In addition, with the green phosphor mass ratio of 30%, the Eu~(3+)-doped PiG based WLEDs achieve a warm white light with a correlated color temperature (CCT) of 4496 K and a color rendering index (CRI) of 82 at the driving current of 350 mA. These results indicate that the Eu~(3+)-doped PiG is a promising multi-color converter for high-power WLEDs.