Title:
FLUORESCENT SUBSTANCE, PROCESS FOR PRODUCING SAME, AND LIGHT-EMITTING DEVICE INCLUDING SAID FLUORESCENT SUBSTANCE
Document Type and Number:
WIPO Patent Application WO/2015/087861
Kind Code:
A1
Abstract:
[Problem] To provide a fluorescent substance which emits red light at a high luminescent efficiency, a light-emitting device, and a process for producing the fluorescent substance.
[Solution] A fluorescent substance which emits red light and has a basic composition represented by the formula Ka(Si1-x, Mnx)Fb, characterized in that when this fluorescent substance is analyzed for Raman spectrum, the ratio of the intensity of a peak assignable to the Mn-F bond which is contained in the crystal and appearing at a Raman shift in the range of 600±10 cm-1 to the intensity of a peak assignable to the Si-F bond which is contained in the crystal and appearing at a Raman shift in the range of 650±10 cm-1 is 0.09-0.22. This fluorescent substance can be produced by bringing a reaction solution into contact with a silicon source, the reaction solution having a molar ratio of hydrogen fluoride to potassium permanganate of 87-127.
Inventors:
HIRAMATSU RYOSUKE (JP)
TAMURA JUN (JP)
ISHIDA KUNIO (JP)
ALBESSARD KEIKO (JP)
KATO MASAHIRO (JP)
TAMURA JUN (JP)
ISHIDA KUNIO (JP)
ALBESSARD KEIKO (JP)
KATO MASAHIRO (JP)
Application Number:
PCT/JP2014/082516
Publication Date:
June 18, 2015
Filing Date:
December 09, 2014
Export Citation:
Assignee:
TOSHIBA KK (JP)
TOSHIBA MATERIALS CO LTD (JP)
TOSHIBA MATERIALS CO LTD (JP)
International Classes:
C09K11/61; C09K11/08; C09K11/59; C09K11/62; C09K11/64; C09K11/68; C09K11/84; H01L33/50
Domestic Patent References:
| WO2009119486A1 | 2009-10-01 | |||
| WO2013137144A1 | 2013-09-19 |
Foreign References:
| JP2010209311A | 2010-09-24 | |||
| JP2013014715A | 2013-01-24 |
Other References:
SADAO ADACHI ET AL.: "Direct synthesis and properties of K2SiF6:Mn4+ phosphor by wet chemical etching of Si wafer", JOURNAL OF APPLIED PHYSICS, vol. 104, 18 July 2008 (2008-07-18), pages 023512
Attorney, Agent or Firm:
KATSUNUMA Hirohito et al. (JP)
Katsunuma Hirohito (JP)
Katsunuma Hirohito (JP)
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