Color Conversion Materials for High‐Brightness Laser‐Driven Solid‐State Lighting

TLDR

Solid‑state lighting is evolving toward higher power, brightness, and smaller size, and laser‑driven technology is emerging for its super‑high brightness and compactness, creating new demands for color‑conversion phosphors and enabling high‑brightness white laser light in lighting, displays, healthcare, and communications. The study summarizes state‑of‑art achievements in laser phosphors and discusses luminescence saturation, light‑extraction efficiency, and light‑uniformity issues in laser lighting technology. The authors comparatively overview typical color‑converter types—including single crystals, phosphor ceramics, phosphor‑in‑glass, phosphor films, and quantum‑well LEDs—to assess their suitability for laser‑driven solid‑state lighting. The paper highlights challenges and outlook for laser‑driven solid‑state lighting and proposes empirical rules for designing novel laser phosphors.

Abstract

Abstract Solid‐state lighting is advancing toward higher power, higher brightness, and smaller size to cope with the market competitiveness, and laser‐driven solid‐state lighting technology is springing up owing to its super‐high brightness and compactness. These developments put forward new requirements for color conversion materials (i.e., phosphors). Here, the state‐of‐art achievements in laser phosphors are summarized, and the topics of luminescence saturation, light extraction efficiency, and light uniformity encountered in laser lighting technology are discussed. Several typical types of color converters, such as single crystal, phosphor ceramics, phosphor‐in‐glass, phosphor films, and quantum‐well light‐emitting diodes, are comparatively overviewed and discussed. The cutting‐edge applications of high‐brightness white laser light in lighting, displays, healthcare, and communications are summarized. The challenges and outlook in laser‐driven solid‐state lighting and some empirical rules for designing novel laser phosphors are highlighted.