The color conversion filter of the present invention contains at least one kind of squarylium dye that radiates fluorescence light, has a wavelength conversion capability, absorbs light in an unneeded wavelength region, radiates fluorescence light in a preferable wavelength region, and does not allow decrease in brightness, and thus is preferable for color conversion light-emitting devices, photoelectric conversion devices and the like. Specifically, the color conversion filter of the present invention has an absorption having a high intensity in the range of 570 to 600 nm, and thus is preferable for use in a color conversion filter that radiates fluorescence light having a high intensity in the range of 600 to 780 nm.
本发明的色彩转换滤光片含有至少一种可辐射荧光的鳞片
染料,具有波长转换能力,可吸收不需要波长区域的光,辐射优选波长区域的荧光,且亮度不会降低,因此适用于色彩转换发光设备、光电转换设备等。具体而言,本发明的色彩转换滤光片在 570 至 600 纳米范围内具有高强度吸收,因此更适合用于在 600 至 780 纳米范围内辐射高强度荧光的色彩转换滤光片。