Patent ID: 8673180
Filing Date: 2014-03-18
Classification: C09K,H01L,H05B,Y02B

Abstract:
1. A light emitting device, comprising: an energy source configured to generate light energy; and an up-conversion phosphor configured to emit light having a wavelength shorter than that of the light energy generated from the energy source, wherein the up-conversion phosphor comprises an ordered oxyfluoride compound having a formula: where A is Sr alone or Sr mixed with Ba and/or Ca such that A is made up of at least ⅔ mole % of Sr and ⅓mole % or less of Ba and/or Ca; R is Ho, Pr, Nd, Er, Tm, Yb, or combinations thereof; M is Al, Ga, In, B, W, Mo, or mixtures thereof; 0<a<0.3; δ