Title:
PHOSPHOR AND LIGHT EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/073887
Kind Code:
A1
Abstract:
The present invention provides a phosphor which can be produced easily and emits green fluorescence by being efficiently excited by excitation light in the wavelength range from blue light to near-ultraviolet light. The phosphor is small in change of the luminous intensity due to wavelength fluctuation of the excitation light.
This phosphor has a chemical structure represented by the following general formula (A).
A(M1-a-xEuaMnx)L(Si1-bGeb)2O7 (A)
(In the formula, A represents one or more elements selected from among Li, Na and K; M represents one or more elements selected from among Mg, Ca, Sr, Ba, Zn and Mn; L represents one or more elements selected from among Ga, Al, Sc, Y, La, Gd and Lu; a represents a number that satisfies 0.001 ≤ a ≤ 0.3; b represents a number that satisfies 0 ≤ b ≤ 0.5; and x represents a number that satisfies 0 ≤ x ≤ 0.2.)
Inventors:
TODA KENJI (JP)
ISHIGAKI TADASHI (JP)
ISHIGAKI TADASHI (JP)
Application Number:
PCT/JP2011/077378
Publication Date:
June 07, 2012
Filing Date:
November 28, 2011
Export Citation:
Assignee:
PANASONIC CORP (JP)
TODA KENJI (JP)
ISHIGAKI TADASHI (JP)
TODA KENJI (JP)
ISHIGAKI TADASHI (JP)
International Classes:
C09K11/59; C09K11/79; H01L33/50
Domestic Patent References:
| WO2007029369A1 | 2007-03-15 |
Foreign References:
| JP2004161981A | 2004-06-10 | |||
| JP2008069250A | 2008-03-27 | |||
| JP3700502B2 | 2005-09-28 | |||
| JP4148245B2 | 2008-09-10 | |||
| JP4104013B2 | 2008-06-18 |
Other References:
YOSHITAKA KAWAKAMI ET AL.: "Development of novel alkaline earth silicate phosphor for LED", RARE EARTHS, 23 May 2006 (2006-05-23), pages 136 - 137, XP008170616
YOSHITAKA KAWAKAMI ET AL.: "Development of novel green phosphor for a white LED", RARE EARTHS, 10 May 2007 (2007-05-10), pages 146 - 147, XP008170617
IOSHITAKA KAWAKAMI ET AL.: "Shinki LED-yo Keikotai no Kaihatsu", 19TH FALL MEETING DF THE CERAMIC SOCIETY OF JAPAN KOEN YOKOSHU, 19 September 2006 (2006-09-19), pages 87, XP008169755
AKIRA KOMENO ET AL.: "Shinki Keisan'enkei Keikotai no Kaihatsu", 18TH FALL MEETING OF THE CERAMIC SOCIETY OF JAPAN, DAI 1 KAI ASIA-OCEANIA CERAMIC RENMEI KOKUSAI KAIGI KOEN YOKOSHU, 27 September 2005 (2005-09-27), pages 435, XP008169759
YOSHITAKA KAWAKAMI ET AL.: "Shinki Hakushoku LED-yo Keikotai no Kaihatsu", 20TH FALL MEETING OF THE CERAMIC SOCIETY OF JAPAN KOEN YOKOSHU, 12 September 2007 (2007-09-12), XP008169756
TOMOYUKI NAKANO ET AL.: "Hakushoku LED-yo no Shinki na Ba-Sc-Si-kei Sankabutsu to Sanchikkabutsu no Gosei", 21ST FALL MEETING OF THE CERAMIC SOCIETY OF JAPAN KOEN YOKOSHU, 17 September 2008 (2008-09-17), pages 246, XP008169757
See also references of EP 2604669A4
YOSHITAKA KAWAKAMI ET AL.: "Development of novel green phosphor for a white LED", RARE EARTHS, 10 May 2007 (2007-05-10), pages 146 - 147, XP008170617
IOSHITAKA KAWAKAMI ET AL.: "Shinki LED-yo Keikotai no Kaihatsu", 19TH FALL MEETING DF THE CERAMIC SOCIETY OF JAPAN KOEN YOKOSHU, 19 September 2006 (2006-09-19), pages 87, XP008169755
AKIRA KOMENO ET AL.: "Shinki Keisan'enkei Keikotai no Kaihatsu", 18TH FALL MEETING OF THE CERAMIC SOCIETY OF JAPAN, DAI 1 KAI ASIA-OCEANIA CERAMIC RENMEI KOKUSAI KAIGI KOEN YOKOSHU, 27 September 2005 (2005-09-27), pages 435, XP008169759
YOSHITAKA KAWAKAMI ET AL.: "Shinki Hakushoku LED-yo Keikotai no Kaihatsu", 20TH FALL MEETING OF THE CERAMIC SOCIETY OF JAPAN KOEN YOKOSHU, 12 September 2007 (2007-09-12), XP008169756
TOMOYUKI NAKANO ET AL.: "Hakushoku LED-yo no Shinki na Ba-Sc-Si-kei Sankabutsu to Sanchikkabutsu no Gosei", 21ST FALL MEETING OF THE CERAMIC SOCIETY OF JAPAN KOEN YOKOSHU, 17 September 2008 (2008-09-17), pages 246, XP008169757
See also references of EP 2604669A4
Attorney, Agent or Firm:
NISHIKAWA, Yoshikiyo et al. (JP)
Yoshikiyo Nishikawa (JP)
Yoshikiyo Nishikawa (JP)
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