Research Progress of Composite Structure Phosphor Materials for Solid-state Lighting

Abstract Solid-state lighting devices driven by blue laser/LED have shown broad application prospects in fields such as automotive headlamps military lighting and medical endoscopes owe to their significant advantages of high luminous efficiency low energy consumption and long service life.As the key wavelength conversion materials of laser/LED lighting devices the structural design of phosphor materials (both macroscopic and microscopic) directly determines the color quality chromaticity parameters and long-term service stability of the devices.However con ventional phosphor materials generally face serious problems such as severe thermal accumulation low light extrac tion efficiency and chromatic instability under high-power-density blue LD/LED excitation which seriously restrict the development of lighting devices.For this reason composite-structure phosphor materials with excellent optical thermal and physicochemical stability properties have emerged as the key breakthrough to solve the above problems.This review systematically summarizes recent advances in composite-structure phosphor materials for high-powder laser/LED lighting applications.From multiple dimensions such as macroscopic (homogeneous/heterogeneous com posite structures high thermal conductivity composite structures special configuration designs) to microscopic