Advances in Phosphors for Light-emitting Diodes

TLDR

LEDs are favored for general lighting due to their high efficiency, durability, and eco‑friendly materials, and effective lighting requires phosphor materials, though only a limited range of phosphors are suitable for LEDs. This study aims to advance phosphor design for LEDs by reviewing recent progress in their composition, structure, and packaging, and outlining future research directions and challenges. The authors review recent advances in phosphor prescription, morphology, structure, spectrum, and packaging for LED applications.

Abstract

Light-emitting diodes (LEDs) are excellent candidates for general lighting because of their rapidly improving efficiency, durability, and reliability, their usability in products of various sizes, and their environmentally friendly constituents. Effective lighting devices can be realized by combining one or more phosphor materials with chips. Accordingly, it is very important that the architecture of phosphors be developed. Although numerous phosphors have been proposed in the past several years, the range of phosphors that are suitable for LEDs is limited. This work describes recent progress in our understanding of the prescription, morphology, structure, spectrum, and packaging of such phosphors. It suggests avenues for further development and the scientific challenges that must be overcome before phosphors can be practically applied in LEDs.