Please use this identifier to cite or link to this item:
Title: White LED light production using dibromoperylene derivatives in down conversion of energy
Authors: Aksoy, Erkan
Demir, Nuriye
Varlıklı, Canan
Keywords: Downconversion
Organic phosphor
White light
Publisher: Canadian Science Publishing
Source: Aksoy, E., Demir, N., and Varlıklı, C. (2018). White LED light production using dibromoperylene derivatives in down conversion of energy. Canadian Journal of Physics, 96(7), 734-739. doi:10.1139/cjp-2017-0752
Abstract: Perylene derivatives of N,N′-bis(2,6-diisopropylphenyl)-1,6(7)-dibromoperylene-3,4,9,10-tetracarboxylic diimide (DBrPDI) and 1,7-dibromo perylene-3,4,9,10-tetracarboxylic acid butyl ester (DBrPTE) were synthesized, and their structural and optical characterizations were explored. Both DBrPDI and DBrPTE, which were utilized as wavelength converters on a GaN/InGaN based blue LED, were singlet sensitizers and had molar absorptivity constants around 104 Lmol-1cm-1. The blue LED that was used had Commission internationale de l'eclairage (CIE) coordinates of x, y = 0.13, 0.06; power and luminous efficiencies of 2.7 lm/W and 6.6 cd/A @5 mA, respectively. Because the fluorescence quantum yield of DBrPDI was much higher than that of DBrPTE, a meaningful white light efficiency was obtained with the diimide derivative. The use of DBrPDI resulted in white light with CIE coordinates of x, y = 0.34, 0.29 and luminous efficiency of 6.35 cd/A @5 mA, respectively. Using DBrPDI in a resin matrix resulted in more than three orders of magnitude increase in the luminous efficiency value (23.0 cd/A @5 mA) while the CIE coordinates remained the same. Whenever the applied current reached 20 mA, a CRI value of Ra = 90 was obtained.
Description: This paper is part of a Special Issue entitled the 33rd International Physics Conference of Turkish Physical Society.
ISSN: 0008-4204
Appears in Collections:Photonics / Fotonik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File Description SizeFormat 
7056.pdfConference Paper1.26 MBAdobe PDFThumbnail
Show full item record

CORE Recommender


checked on Apr 5, 2024


checked on May 24, 2024

Page view(s)

checked on May 27, 2024


checked on May 27, 2024

Google ScholarTM



Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.