Fluorescent composition having the ability to change wavelengths of light, shaped article of said composition as a light wavelength converting element, and device for converting optical energy to electrical energy using said element
申请人:TEIJIN LIMITED
公开号:EP0041274A1
公开(公告)日:1981-12-09
A fluorescent composition consisting essentially of (1) a polymerhaving a solubility parameter of at least about 9, such as polyethylene terephthalate etc., and
(2) one or more organic fluorescentsubstances, at leastone of said fluorescent substances showing difficult solubility, such as anthraquinonic pigments, such that when 0.5 part by weight of said at least one fluorescent substance and 100 parts by weight of polypropylene are mixed in the molten state at 300°C for 10 minutes and formed into a film having a thickness of about 1 mm, the film has a non-transmission index ETi (%), as defined by the following equation, of at least 7,
wherein EAs is the percent light absorption of said film at 800 nm, and EAb is the percent light absorption at800 nm of a film of polypropylene having a thickness of about 1 mm,
said fluorescent composition being characterized by the fact that when it is formed into a film having a thickness of about 1 mm,the film has a non-transmission index PTi (%), as defined by the following equation, of not more than 10,
wherein PAs is the percent light absorption at 800 nm of said film of the fluorescent composition, and PAb is the percent light absorption at 800 nm of a film having a thickness of about 1 mm of the polymer in the fluorescent composition.
Preferably, the composition is of a non-radiation type and contains at least two organic fluorescent substances, at least one of which shows difficult solubility, and at least two of which are such that the emission spectrum of one organic fluorescent substance has a wavelength common to the absorption spectrum of another organic fluorescent substance.
A shaped article composed of the composition is useful for light wavelength conversion.
一种荧光组合物,主要包括 (1) 一种溶解度参数至少为 9 左右的聚合物,如聚对苯二甲酸乙二醇酯等,以及 (2) 一种或多种有机荧光物质,其中至少有一种荧光物质具有难溶性,如蒽醌颜料。
(2) 一种或多种有机荧光物质,其中至少一种荧光物质具有难溶性,如蒽醌颜料,当 0.5 重量份的至少一种荧光物质和 100 重量份的聚丙烯在 300°C 的熔融状态下混合 10 分钟并形成厚度约为 1 毫米的薄膜时,该薄膜的不透光指数 ETi(%)(如下式定义)至少为 7、
其中 EAs 是所述薄膜在 800 纳米波长处的光吸收百分率,EAb 是厚度约为 1 毫米的聚丙烯薄膜在 800 纳米波长处的光吸收百分率、
所述荧光组合物的特征在于,当它被制成厚度约为 1 毫米的薄膜时,薄膜的非透射指数 PTi(%)(如下式所定义)不超过 10、
其中 PAs 是所述荧光组合物薄膜在 800 纳米波长处的光吸收百分率,PAb 是厚度约为 1 毫米的荧光组合物聚合物薄膜在 800 纳米波长处的光吸收百分率。
优选地,该组合物为非辐射型,包含至少两种有机荧光物质,其中至少一种有机荧光物质具有难溶性,至少两种有机荧光物质的发射光谱与另一种有机荧光物质的吸收光谱具有共同的波长。
由该组合物构成的成型物品可用于光波长转换。