分享好友 知识库首页 频道列表

Light emitting device

2025-06-20 20:221800下载
文件类型:PDF文档
文件大小:812K
PROBLEM TO BE SOLVED : To provide a light emitting device that achieves excellent luminous efficacy by suppressing reabsorption between phosphors. SOLUTION : The light emitting device 10 includes : a light emitting element 14 mounted on a board 12; a red phosphor layer 20 which is formed on the light emitting element, has a semicircular shape with a diameter r, and contains a red phosphor represented by the following formula (1) (M1-x1Eux1)aSibAlOcNd, wherein M is an element selected from IA group elements, IIA group elements, IIIA group elements, IIIB group elements except Al, rare-earth elements, and IVB group elements; and x1, a, b, c, and d is 0
反对 0
举报 0
收藏 0
打赏 0
评论 0