White Light Emission from a Simple Mixture of Fluorescent Organic Compounds

Norfatirah Muhamad Sarih; Peter Myers; Anna Slater; Ben Slater; Zanariah Abdullah; Hairul Anuar Tajuddin; Simon Maher

doi:10.1038/s41598-019-47847-5

White Light Emission from a Simple Mixture of Fluorescent Organic Compounds

Sci Rep. 2019 Aug 14;9(1):11834. doi: 10.1038/s41598-019-47847-5.

Authors

Norfatirah Muhamad Sarih^{1

2}, Peter Myers³, Anna Slater³, Ben Slater³, Zanariah Abdullah², Hairul Anuar Tajuddin², Simon Maher⁴

Affiliations

¹ Department of Electrical Engineering and Electronics, University of Liverpool, Brownlow Hill, Liverpool, L69 3GJ, UK.
² Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
³ Materials Innovation Factory, Department of Chemistry, University of Liverpool, Liverpool, L7 3NY, UK.
⁴ Department of Electrical Engineering and Electronics, University of Liverpool, Brownlow Hill, Liverpool, L69 3GJ, UK. s.maher@liverpool.ac.uk.

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.

Publication types

Research Support, Non-U.S. Gov't