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White Light Emission from a Simple Mixture of Fluorescent Organic Compounds

Muhamad Sarih N 1 , Myers P 2 , Slater A 2 , Slater B 2 , Abdullah Z 3 , Tajuddin HA 3 Show all authors , Maher S 4

Affiliations 

  • 1 Department of Electrical Engineering and Electronics, University of Liverpool, Brownlow Hill, Liverpool, L69 3GJ, UK
  • 2 Materials Innovation Factory, Department of Chemistry, University of Liverpool, Liverpool, L7 3NY, UK
  • 3 Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
  • 4 Department of Electrical Engineering and Electronics, University of Liverpool, Brownlow Hill, Liverpool, L69 3GJ, UK. s.maher@liverpool.ac.uk
Sci Rep, 2019 08 14;9(1):11834.
PMID: 31413269 DOI: 10.1038/s41598-019-47847-5

Abstract

Three fluorescent organic compounds-furocoumarin (FC), dansyl aniline (DA), and 7-hydroxycoumarin-3-carboxylic acid (CC)-are mixed to produce almost pure white light emission (WLE). This novel mixture is immobilised in silica aerogel and applied as a coating to a UV LED to demonstrate its applicability as a low-cost, organic coating for WLE via simultaneous emission. In ethanol solution and when immobilised in silica aerogel, the mixture exhibits a Commission Internationale d'Eclairage (CIE) chromaticity index of (0.27, 0.33). It was observed that a broadband and simultaneous emission involving coumarin carboxylic acid, furocoumarin and dansyl aniline played a vital role in obtaining a CIE index close to that of pure white light.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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