FLUORESCENT MATERIAL FOR VIOLET RAY EXCITATION, COMPOSITION CONTAINING FLUORESCENT MATERIAL AND LIGHT-EMITTING DEVICE USING THE FLUORESCENT MATERIAL AND LIGHTENING APPARATUS AND PICTURE DISPLAY UNIT USING THE LIGHT-EMITTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a novel fluorescent material for violet ray excitation which provides a high-brightness light-emitting device when used in light-emitting devices including a UV ray LED or a violet LED.SOLUTION: A fluorescent material for violet excitation is of formula [1], emits light by excitation with UV or violet rays of wavelengths of 380-430 nm, has a peak wavelength of the excitation spectra in the range of 370-440 nm and a peak wavelength of emission spectra with excitation light of the wavelength of 405 nm of 505 nm or longer. [1]: LCe)(AlGa)O(2.5≤x≤3.5; 4≤y≤6; 0.02