Luminescent materials that emit light in the visible range or the near infrared range and methods of forming thereof

摘要

Luminescent materials and methods of forming such materials are described herein. In one embodiment, a luminescent material has the formula: [AaSnbXxX′x′X″x″], where the luminescent material is polycrystalline; A is included in the luminescent material as a monovalent cation; X, X′, and X″are selected from fluorine, chlorine, bromine, and iodine; a is in the range of 1 to 5; b is in the range of 1 to 3; a sum of x, x′, and x″is in the range of 1 to 5; and at least X′is iodine, such that x′/(x+x′+x″)≧⅕.