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

Johan Lub, Sylvain L.J. Hamon, Paul A. van Hal, Ton J. Visser, Jan M. Jansen, Rifat A.M. Hikmet

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)
134 Downloads (Pure)

Abstract

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/cm2 at 60 °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.

Original languageEnglish
Pages (from-to)662-668
Number of pages7
JournalDyes and Pigments
Volume149
DOIs
Publication statusPublished - 1 Feb 2018

Keywords

  • Benzoxanthene dicarboximide
  • Fluorescent compounds
  • LED lighting
  • Photostability
  • Remote phosphor

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