Phosphor-in-glass (PiG) plates for blue laser diode driven white-light emission

摘要

Owing to the great thermal stability, phosphor-in-glass (PiG) is a promising color converter for the laser diode (LD) excitation based high-power white light-emitting LDs. Here, we reported the rapidly developed PiG plates using a facile microwave irradiation technique where the YAG:Ce3+ phosphor embedded with soda-lime silica glass. The effects of phosphor content and microwave irradiation energy were studied for investigating the optimal performance of PiG plate. To evaluate the practical applicability, the luminescence and thermal properties of the PiG plate was compared with the commercial YAG:Ce3+ single-crystal. The PiG plate and YAG:Ce3+ single-crystal individually combined with blue LD exhibited the white light with the CIE color coordinates of (0.3016, 0.3098) and (0.3254, 0.3555), respectively. The maximum surface temperature of the PiG plate was found to be about 96.1 degrees C, which is much lower than the YAG:Ce3+ single-crystal of 124 degrees C. The change in the CIE color coordinate of the PiG with aging time is smaller than that of YAG:Ce3+ single-crystal. This PiG plate might provide an important implication to overcome current limitation of LD driven solid state laser lighting. (C) 2020 Elsevier B.V. All rights reserved.