Exploring the utility of coumarins‐based luminescent spectra converters

Abstract

The physicochemical aspects of functioning the luminescent converters for a rational modification of the emission spectra of light-emitting diodes are considered. These converters use laser dyes' coumarins 314, 334, and 343 to transfigure the primary light-emitting diode spectrum. The fine control of the emission spectra of the mentioned coumarins in polymeric matrices was achieved by introducing nonionic detergents. The relevant characteristics of the photochemical persistence of coumarins in the polymer layers are acquired.

Predicting fluorescence quantum yields for molecules in solution: A critical assessment of the harmonic approximation and the choice of the lineshape function

“…To test whether we can predict fluorescence quantum yields using harmonic models, we selected a sample of coumarin derivatives, for which experimental quantum yields in solution are available in the literature [28][29][30][31][32][33] . Coumarin derivatives are versatile laser dyes 34 and photosensitizers in solar cells and have been studied before by some of us.…”

“…4, except for coumarin 34344 (PhotochemCAD online database). • 10 9 1.2 • 10 10 ClMMC (water) 3.31 3 32. 3.04 4.0 • 10 7 3.0 • 10 7…”

Coumarins into Polyurethanes for Smart and Functional Materials

“…Notable photophysical properties of coumarins have turned them into extensive dyes for probing, brightening or labelling, as a function of substitution on the core structure and the interaction with the surrounding media [18][19][20][21][22][23][24]. Besides, coumarin compounds are widely used in the laser industry as laser dyes, as well as being reported as dopants in light-emitting diodes (LEDs and OLEDs) [25][26][27][28][29][30][31][32].…”