Synthesis of yellow fluorescent dyes derived from benzoxanthene that can be used in colour converters for remote phosphor LED systems

被引:10
作者
Lub, Johan [1 ]
Hamon, Sylvain L. J. [2 ]
van Hal, Paul A. [3 ]
Visser, Ton J. [2 ]
Jansen, Jan M. [3 ]
Hikmet, Rifat A. M. [3 ]
机构
[1] Philips Res, High Tech Campus 11, NL-5656 AE Eindhoven, Netherlands
[2] Syncom Bv, Kadijk 3, NL-9747 AT Groningen, Netherlands
[3] Philips Lighting Res, High Tech Campus 7, NL-5656 AE Eindhoven, Netherlands
关键词
Benzoxanthene dicarboximide; Fluorescent compounds; LED lighting; Photostability; Remote phosphor; COUPLING REACTION; POLYMER FIBERS; BENZIMIDAZOXANTHENOISOQUINOLINONES;
D O I
10.1016/j.dyepig.2017.11.024
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The current commercially available yellow organic dyes are not stable enough to be used for remote phosphor LED applications. Therefore new yellow benzoxanthene dicarboximide dyes to convert blue light from LED into light of longer wavelengths were synthesized. The spectral properties of the dyes and their stability in PET films were examined. The compounds showed high photoluminescence quantum yield and above all superior photostability under operation conditions (10% reduction in photoluminescence at 450 nm irradiance of 0.016 W/cm(2) at 60 degrees C). With extrapolated lifetimes up to 27000 h, a huge improvement in stability was established when compared to the commercially available yellow dyes exhibiting lifetimes lower than 1000 h.
引用
收藏
页码:662 / 668
页数:7
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