Title:
PHOSPHOR, METHOD FOR PRODUCING SAME, PHOSPHOR-CONTAINING COMPOSITION, LIGHT-EMITTING DEVICE, IMAGE DISPLAY, AND ILLUMINATING DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/091687
Kind Code:
A1
Abstract:
Disclosed is a high-performance phosphor producing green fluorescence which is excellent in color purity and conversion efficiency for blue light or near ultraviolet light. Specifically disclosed is a phosphor satisfying the following conditions (i)-(v). (i) The emission peak wavelength is not less than 510 nm but not more than 542 nm when excited by light having a peak wavelength of 400 nm or 455 nm. (ii) The emission peak half-width is not more than 75 nm when excited by light having a peak wavelength of 400 nm or 455 nm. (iii) The external quantum efficiency defined by the formula below is not less than 0.42 when excited by light having a peak wavelength of 400 nm or 455 nm. (External Quantum Efficiency) = (Internal Quantum Efficiency) × (Absorption Efficiency) (iv) At least a part of the surface of the phosphor is composed of a material containing oxygen. (v) The phosphor contains a metal element which can be divalent or trivalent (hereinafter referred to as "MII element"), and the ratio of the mole number of the MII element with respect to the total mole number of divalent elements contained in the phosphor is more than 1% but less than 15%.
Inventors:
YOSHINO MASAHIKO (JP)
MIURA CHISATO (JP)
KIJIMA NAOTO (JP)
KOMURO NAOYUKI (JP)
MIURA CHISATO (JP)
KIJIMA NAOTO (JP)
KOMURO NAOYUKI (JP)
Application Number:
PCT/JP2007/052405
Publication Date:
August 16, 2007
Filing Date:
February 09, 2007
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
YOSHINO MASAHIKO (JP)
MIURA CHISATO (JP)
KIJIMA NAOTO (JP)
KOMURO NAOYUKI (JP)
YOSHINO MASAHIKO (JP)
MIURA CHISATO (JP)
KIJIMA NAOTO (JP)
KOMURO NAOYUKI (JP)
International Classes:
C09K11/59; C09K11/08; H01L33/50; H01L33/56; H01J61/44
Domestic Patent References:
| WO2004111156A1 | 2004-12-23 | |||
| WO2003021691A1 | 2003-03-13 |
Foreign References:
| JP2005520916A | 2005-07-14 | |||
| JP2005063837A | 2005-03-10 | |||
| JP2004115633A | 2004-04-15 | |||
| US6982045B2 | 2006-01-03 | |||
| JPH02209989A | 1990-08-21 | |||
| JPH02233794A | 1990-09-17 | |||
| JPH03231987A | 1991-10-15 | |||
| JPH06314593A | 1994-11-08 | |||
| JP2002223008A | 2002-08-09 | |||
| JP2005082788A | 2005-03-31 | |||
| JP2006028458A | 2006-02-02 | |||
| JP2006047274A | 2006-02-16 | |||
| JP2006047277A | 2006-02-16 | |||
| JP2006176468A | 2006-07-06 | |||
| JP2004300247A | 2004-10-28 | |||
| JP2005884506A | ||||
| JP2841377B2 | 1998-12-24 | |||
| JP3094113B2 | 2000-10-03 | |||
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Other References:
AICHE JOURNAL, vol. 44, no. 5, 1998, pages 1141
See also references of EP 1995294A4
See also references of EP 1995294A4
Attorney, Agent or Firm:
SANADA, Tamotsu (10-31, Kichijoji-honcho 1-chome,, Musashino-sh, Tokyo04, JP)
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