NEAR INFRARED FLUORESCENT NITRIDE MATERIAL AND LIGHT-EMITTING DEVICE CONTAINING NEAR INFRARED FLUORESCENT NITRIDE MATERIAL

摘要

Disclosed is a near infrared fluorescent nitride material having a chemical formula of A_xM_yB_zSi₅N₈: (aEr,bEu,cR), wherein A is selected from one or two of La, Lu and Y elements, M is selected from at least one of Ca, Sr, and Ba elements, B is selected from one of Li, Na, K elements, R is selected from one of Yb and Pr elements. In the A_xM_yB_zSi₅N₈: (aEr,bEu,cR), the value ranges of x, y and z satisfy: 0.01 ≤ x ≤ 0.2, 1.6 ≤ y ≤ 1.915, and 0.01 ≤ z ≤ 0.2; and the value ranges of a, b and c satisfy: 0.01 ≤ a ≤ 0.1, 0.05 ≤ b ≤ 0.1, and 0.005 ≤ c ≤ 0.03.