| 摘要 |
A fluorescent conversion filter converts the light in the region between near-ultraviolet and blue to green light and emits the green light with a high color purity, and to provide an organic light emitting element including such a fluorescent conversion filter. The fluorescent conversion filter contains, in a matrix resin, a fluorescent converter material, selected from a fluorescent dye, a fluorescent pigment and a mixture of a fluorescent dye and a fluorescent pigment, that absorbs light in the wavelength region between near-ultraviolet and blue and emits green light, and a light absorbing dye. The fluorescent converter material, that has an absorption band in the wavelength region between 450 and 500 nm, is contained in the fluorescent conversion filter at a mixing ratio, at that the light absorbance of the fluorescent conversion filter is one or more in the wavelength region between 450 and 500 nm. The light absorbing dye, that has an absorption band in the more than 550 nm wavelength region, is contained in the fluorescent conversion filter at a mixing ratio, at that the light absorbance of the fluorescent conversion filter is 0.1 or more in the wavelength region between 550 and 650 nm. By transmitting the light from an organic light emitter in the wavelength region between 450 and 520 mn through the fluorescent conversion filter according to the invention, green light with a high color purity is obtained. A fluorescent conversion film containing a fluorescent converter material and a light absorption film containing a light absorbing dye may be laminated to form a laminate fluorescent conversion filter.
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