Laser spot associated high-saturation phosphor-in-glass film for transmissive and reflective high-brightness laser lighting

Phosphor-in-glass (PiG) film is a promising luminescent material in high-brightness laser lighting for its advantages of high efficiency, outstanding color quality, and low-cost preparation, which must bear power (LP) density (LPD) simultaneously to enable high-luminance light. Herein, spot associated high-saturation PiG was proposed transmissive reflective lighting. Two types films were prepared by printing sintering La3Si6N11:Ce3+ (LSN) phosphor-borosilicate glass pastes on sapphire substrate (PiG-S) an AlN (PiG-A), respectively. The with perfect crystal structure phosphor reliably bonded the substrates. effects areas luminescence saturation LP LPD investigated films. With increase area from 0.5 2.5 mm2, threshold gradually raised, while decreased. PiG-S withstands 23.46 W 20.64 W/mm2, enabling white light luminous flux 3677 lm. PiG-A 41.12 35.56 2882 Moreover, maintains lower working temperature compared PiG-S, temperatures reduce increasing area. results demonstrate that realize thresholds simultaneously, luminance