2018
DOI: 10.1039/c7cp08670a
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Triphenylamine based yellowish-orange light emitting organic dyes (donor–π–acceptor) for hybrid WLEDs and OLEDs: synthesis, characterization and theoretical study

Abstract: Six novel yellowish-orange light emitting dye molecules consisting of an electron deficient phenone (acceptor) linked to triphenylamine (donor), were designed and synthesized. The photophysical and electrochemical properties of the dyes were systematically investigated and examined using DFT calculations. All the synthesized dye materials have shown high quantum yields (ranging from 0.35to0.74%). The dyes emitted intense yellowish-orange (x = 0.427, y = 0.481) to orange color (x = 0.511, y = 0.484) with approp… Show more

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Cited by 38 publications
(18 citation statements)
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“…The absorption maxima of the compounds 9 a and 9 b are shifted to longer wavelength by 53 nm compared to that 2 (λ max = 257 nm). This bathochromic shift is indicative of enhanced π ‐conjugation of the molecular backbone by the electron donating groups . Introduction of ethynyl spacer between the acceptor and donor (methoxyphenyl group) resulted in a considerable red‐shift of the low energy absorption maximum from 310 ( 9 a ) to 329 nm ( 9 b ).…”
Section: Resultsmentioning
confidence: 99%
“…The absorption maxima of the compounds 9 a and 9 b are shifted to longer wavelength by 53 nm compared to that 2 (λ max = 257 nm). This bathochromic shift is indicative of enhanced π ‐conjugation of the molecular backbone by the electron donating groups . Introduction of ethynyl spacer between the acceptor and donor (methoxyphenyl group) resulted in a considerable red‐shift of the low energy absorption maximum from 310 ( 9 a ) to 329 nm ( 9 b ).…”
Section: Resultsmentioning
confidence: 99%
“…TPA‐2 coated LEDs demonstrated bright white emission at a concentration of 0.06 m with CIE coordinates of (0.322,0.335). [ 112 ] Wu et al reported a white fluorescent hydrogel prepared by the one‐pot micellar copolymerization of hydrophilic acrylamide and hydrophobic single donor–acceptor chromophore monomer, in which the unimer and the dimer of the chromophore coexisted and generated high‐ and low‐energy emission. The fluorescent behavior of the hydrogel can be controlled by phototreatment or heat treatment, inducing the unimer‐to‐dimer transformation of the chromophore and thus allowing for the variation of the fluorescent color from blue to white and then to yellow, corresponding to the variation of CIE coordinates from (0.187, 0.172) to (0.325, 0.329) and then to (0.451, 0.449).…”
Section: Recent Advances In Organic and Polymer Luminescent Materialsmentioning
confidence: 99%
“…However, the reliability of organic phosphors has scarcely been reported so far. Indeed, the use of organic dyes for WLED applications is appealing in terms of their luminescence properties but the stability studies are only superficial (Boonsin et al, 2015;Kajjam et al, 2018). As mentioned before, to further address a practical application in commercial lighting devices, a major specification required of the fluorophore and its associated system is to present long-term stability with respect to various types of stress in real operating conditions.…”
Section: Introductionmentioning
confidence: 99%