A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
LIGHT WAVELENGTH CONVERSION MEMBER AND LIGHT EMISSION DEVICE
To provide an optical wavelength conversion member and a light-emitting device, each of which achieves compatibility between high fluorescence intensity and high color uniformity. In an optical wavelength conversion member 1, each of A and B of ABOis at least one element selected from the following element groups:A: Sc, Y, and lanthanoids (except for Ce), andB: Al and Ga; andthe following relations are satisfied:andwherein X represents a proportion corresponding to the ratio a/N, Y represents a proportion corresponding to the ratio b/N, and Z represents a proportion corresponding to the ratio c/N, wherein N represents the total number of ABO:Ce crystal grains present in a 20 µm square region of a cross section of a ceramic sintered body; a represents the number of ABO:Ce crystal grains present in AlOcrystal grains; b represents the number of ABO:Ce crystal grains each being present at an AlOcrystal grain boundary and not in contact with another ABO:Ce crystal grain; and c represents the number of ABO:Ce crystal grains each being present at an AlOcrystal grain boundary and in contact with one or more other ABO:Ce crystal grains.
LIGHT WAVELENGTH CONVERSION MEMBER AND LIGHT EMISSION DEVICE
To provide an optical wavelength conversion member and a light-emitting device, each of which achieves compatibility between high fluorescence intensity and high color uniformity. In an optical wavelength conversion member 1, each of A and B of ABOis at least one element selected from the following element groups:A: Sc, Y, and lanthanoids (except for Ce), andB: Al and Ga; andthe following relations are satisfied:andwherein X represents a proportion corresponding to the ratio a/N, Y represents a proportion corresponding to the ratio b/N, and Z represents a proportion corresponding to the ratio c/N, wherein N represents the total number of ABO:Ce crystal grains present in a 20 µm square region of a cross section of a ceramic sintered body; a represents the number of ABO:Ce crystal grains present in AlOcrystal grains; b represents the number of ABO:Ce crystal grains each being present at an AlOcrystal grain boundary and not in contact with another ABO:Ce crystal grain; and c represents the number of ABO:Ce crystal grains each being present at an AlOcrystal grain boundary and in contact with one or more other ABO:Ce crystal grains.
LIGHT WAVELENGTH CONVERSION MEMBER AND LIGHT EMISSION DEVICE
LICHTWELLENLÄNGENUMWANDLUNGSELEMENT UND LICHTEMITTIERENDE VORRICHTUNG
ÉLÉMENT DE CONVERSION DE LONGUEUR D'ONDE DE LUMIÈRE ET DISPOSITIF ÉLECTROLUMINESCENT
MOTEKI JUN (author) / TAKAKU SHOHEI (author) / KATSU YUSUKE (author) / MITSUOKA TAKESHI (author) / ITO TSUNEYUKI (author)
2021-09-15
Patent
Electronic Resource
English
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