Toward High‐Brightness Laser Lighting: Progress and Perspectives on Phosphor‐in‐Glass Films

Abstract Laser lighting is considered as a next‐generation solid‐state lighting (SSL) source due to its advantages of high‐power density and brightness, high collimation, long irradiation distance, and free of “efficiency droop.” Laser‐excited phosphor, in which blue laser diodes (LDs) excite a yellow phosphor converter, is a common method to realize white laser lighting. As a novel all‐inorganic phosphor converter material with easy preparation, low cost, adjustable luminescent property, and ability to combine with high heat‐conducting substrate, the phosphor‐in‐glass film (PiGF) attracts a lot of attention. In this perspective, the state‐of‐art research data on PiGFs are summarized, and the preparation and constitution of PiGF are introduced. The topics about how to improve the luminescence saturation threshold (ST), light extraction, color uniformity, and color rendering in laser lighting are discussed. Correspondingly, the applications in laser lighting and display, biomedical devices, and visible light communications are outlined. Moreover, the prospects of future directions about PiGFs in laser‐driven lighting are indicated. This work will promote the study on high‐performance PiGFs in laser lighting and its applications.