US2014264169A1PendingUtilityA1

Red light-emitting fluorescent substance and light-emitting device employing the same

Assignee: TOSHIBA KKPriority: Sep 9, 2010Filed: May 27, 2014Published: Sep 18, 2014

Est. expirySep 9, 2030(~4.1 yrs left)· nominal 20-yr term from priority

Inventors:Aoi Okada Yumi Fukuda Naotoshi Matsuda Iwao Mitsuishi Shinya Nunoue Keiko Albessard Masahiro Kato

H10W 90/756H10W 74/00H10W 72/5522C09K 11/77348C09K 11/0883H10H 20/8512H10H 20/80C09K 11/7728Y02B20/00F21K 9/64

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Claims

Abstract

The embodiment provides a red light-emitting fluorescent substance represented by the following formula (1): (M 1-x EC x ) a M 1 b AlO c N d (1). In the formula (1), M is an element selected from the group consisting of IA group elements, IIA group elements, IIIA group elements, IIIB group elements, rare earth elements and IVA group elements; EC is an element selected from the group consisting of Eu, Ce, Mn, Tb, Yb, Dy, Sm, Tm, Pr, Nd, Pm, Ho, Er, Cr, Sn, Cu, Zn, As, Ag, Cd, Sb, Au, Hg, Tl, Pb, Bi and Fe; M 1 is different from M and is selected from the group consisting of tetravalent elements; and x, a, b, c and d are numbers satisfying the conditions of 0<x<0.2, 0.55<a<0.80, 2.10<b<3.90, 0<c≦0.25 and 4<d<5, respectively. This substance emits luminescence having a peak in the wavelength range of 620 to 670 nm when excited by light of 250 to 500 nm.

Claims

exact text as granted — not AI-modified

1 . A fluorescent substance
 represented by the following formula (1):
   (M 1-x EC x ) a M 1   b AlO c N d   (1)
 
   
       in which M is an element selected from the group consisting of IA group elements, IIA group elements, IIIA group elements, IIIB group elements, rare earth elements and IVA group elements; EC is an element selected from the group consisting of Eu, Ce, Mn, Tb, Yb, Dy, Sm, Tm, Pr, Nd, Pm, Ho, Er, Cr, Sn, Cu, Zn, As, Ag, Cd, Sb, Au, Hg, Tl, Pb, Bi and Fe; M 1  is different from M and is selected from the group consisting of tetravalent elements; and x, a, b, c and d are numbers satisfying the conditions of 0&lt;x&lt;0.2, 0.55&lt;a&lt;0.80, 2.10&lt;b&lt;3.90, 0&lt;c≦0.25 and 4&lt;d&lt;5, respectively; and
 emitting luminescence having a peak in the wavelength range of 620 to 670 nm under excitation by light in the wavelength range of 250 to 500 nm.

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