Patent number: 8242680
Abstract: A green phosphor, has an orthorhombic structure of a Pnma space group and the Formula 1: (M11-xDx)pM2qOrAs??[Formula 1] wherein M1 is magnesium, calcium, strontium, barium, and any combination thereof, D is at least one of metal selected from the group consisting of europium, manganese, antimony, cerium, praseodymium, neodymium, samarium, terbium, dysprosium, erbium, ytterbium, bismuth, and any combination thereof, M2 is at least one selected from the group consisting of silicon, germanium, aluminum, gallium, and any combination thereof, A is at least one selected from the group consisting of chlorine, fluorine, bromine, iodine, and any combination thereof, and 2.7?p?3.3, 0.7?q?1.3, 3.5?r?4.5, 1.7?s?2.3, and 0<x?0.1. A method of preparing the green phosphor is disclosed, and a white light-emitting device including the green phosphor. The white light-emitting device has good thermal stability.
Type:
Grant
Filed:
June 1, 2011
Date of Patent:
August 14, 2012
Assignee:
Samsung Electronics Co., Ltd.
Inventors:
Tae-gon Kim, Tae-hyung Kim, Seoung-jae Im, Seung-joo Kim