Title:
FLUORESCENT SUBSTANCE FOR VACUUM ULTRAVIOLET-EXCITED LIGHT EMITTING ELEMENT
Document Type and Number:
Japanese Patent JP2007246918
Kind Code:
A
Abstract:
To provide a fluorescent substance for light emitting elements excited by vacuum ultraviolet rays, having high emission brightness and causing little lowering of brightness by plasma exposure.
The fluorescent substance for light emitting elements excited by vacuum ultraviolet rays comprises a compound expressed by general formula: mM1O-nM2O-2M3O2(M1is one or more elements selected from Ca, Sr and Ba; M2is one or more elements selected from Mg and Zn; M3is one or more elements selected from Si and Ge; 0.5≤m≤3.5; 0.5≤n≤2.5; when m=n=1, M1is two or more elements selected from Ca, Sr and Ba or Sr or Ba) and an activating agent composed of one or more elements selected from Eu and Mn. The invention further provides a fluorescent substance having a crystal structure same as that of either one of diopside, akermanite or merwinite.
COPYRIGHT: (C)2007,JPO&INPIT
Inventors:
TAKEDA TAKASHI
ONO KEIJI
MIYAZAKI SUSUMU
TODA KENJI
SATO MINEO
Application Number:
JP2007138850A
Publication Date:
September 27, 2007
Filing Date:
May 25, 2007
Assignee:
SUMITOMO CHEMICAL CO
International Classes:
C09K11/59; C09K11/66
Domestic Patent References:
| JPS528994A | 1977-01-24 | | | |
| JPS4837715B1 | 1973-11-13 | | | |
| JPH01167394A | 1989-07-03 | | | |
Attorney, Agent or Firm:
Takashi Kuboyama
Toru Nakayama
Masayuki Enomoto
