PHOSPHOR, PHOSPHOR PASTE AND LIGHT-EMITTING DEVICE - SUMITOMO CHEMICAL COMPANY, LIMITED

Title:

PHOSPHOR, PHOSPHOR PASTE AND LIGHT-EMITTING DEVICE

Document Type and Number:

WIPO Patent Application WO/2008/018575

Kind Code:

A1

Abstract:

Disclosed is a phosphor which enables to obtain a phosphor layer having high luminance even after irradiation time of an excitation source ends. Specifically disclosed is a phosphor containing a first fluorescent material, which is obtained by adding an activator (activator 1) into the base material composed of a compound represented by the formula (1) below, and a second fluorescent material, which is obtained by adding an activator (activator 2) into the base material composed of a compound represented by the formula (2) below. mM11O⋅nM21O⋅2M31O2 (1) pM12O⋅qM22O⋅2M32O2 (2) In the formulae, M11 and M12 independently represent at least one element selected from the group consisting of Ca, Sr and Ba; M21 and M22 independently represent at least one element selected from the group consisting of Mg and Zn; M31 and M32 independently represent at least one element selected from the group consisting of Si and Ge; m is not less than 2.5 but not more than 3.5; n is not less than 0.5 but not more than 1.5; p is not less than 0.5 but not more than 1.5; and q is not less than 0.5 but not more than 1.5.

Inventors:

KUZE, Satoru (2-40-1-311, Kasuga Tsukuba-sh, Ibaraki 21, 3050821, JP)
久世智 (〒21 茨城県つくば市春日２－４０－１－３１１ Ibaraki, 3050821, JP)

Application Number:

JP2007/065675

Publication Date:

February 14, 2008

Filing Date:

August 03, 2007

Export Citation:

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Assignee:

SUMITOMO CHEMICAL COMPANY, LIMITED (27-1, Shinkawa 2-chome Chuo-k, Tokyo 60, 1048260, JP)
住友化学株式会社 (〒60 東京都中央区新川二丁目２７番１号 Tokyo, 1048260, JP)
KUZE, Satoru (2-40-1-311, Kasuga Tsukuba-sh, Ibaraki 21, 3050821, JP)

International Classes:

C09K11/08; C09K11/59; C09K11/66; H01J1/63; H01J29/20; H01J31/12; H01J31/15; H01J61/44; H01L33/00; C09K11/08; C09K11/59; C09K11/66; H01J1/00; H01J29/20; H01J31/12; H01J31/15; H01J61/38; H01L33/00

Attorney, Agent or Firm:

ENOMOTO, Masayuki et al. (Limited5-33, Kitahama 4-chome,Chuo-ku, Osaka-shi, Osaka, 541-8550, JP)

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