A new and efficient red phosphor for solid-state lighting: Cs2TiF6:Mn4+†
Abstract
Cs2TiF6:Mn4+ powder as a novel red phosphor has been successfully fabricated on a large scale through the cation exchange method using K2MnF6 as a Mn4+ source at ambient temperature. The Cs2TiF6:Mn4+ product is well crystallized into a single-phase with a hexagonal micro-rod morphology and presents sharp red emissions under blue light illumination. It can significantly improve Ra and CCT levels of the YAG type white LED used for indoor lighting.