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Generation of white LED light by frequency downconversion using a perylene-based dye

  • Authors: Caruso, F; Mosca, M; Macaluso, R; Feltin, E; Calì, C
  • Publication year: 2012
  • Type: Articolo in rivista (Articolo in rivista)
  • OA Link:


A high efficiency white light emitting diode (LED) was fabricated by generation of frequency down-conversion from a GaN/InGaN blue LED. In place of conventional inorganic phosphors, a perylene-based dye was used for colour conversion. The resulting hybrid structure is analysed by focusing on the visual performance of the realised LEDs employing the most relevant photometric parameters of a light source. Preparation of the organic polymer is described as well. The thermal stability of the dye was investigated and a simple structure which avoids colour degradation is proposed.