Biscoumarin derivative for designing the WLED display applications

The present technology for the demand of white light emission has received much importance due to their vast applications in various sensors, lightning devices and display etc. By mixing of green, blue and red, white light can produced. We synthesized 4-Hydroxy-3-[(4-hydroxy-2-oxo-2H-chromen-3-yl) (4-methoxyphenyl) methyl]-2H-chromen-2-one (4‒HCMC) dye using acetic acid as a catalyst. In this present work we report, from the photoluminescence spectra duality nature of wavelengths in 4‒HCMC molecule in different solvents is due to solvation effect, this results shows a simple extraction of dye in different solvents can be used to produce the desired wavelength. The 4‒HCMC possesses high color purity, good CIE chromaticity coordinate, and they would have potential organic light emitting devices application, this simple method to produce the blue light as blue component can play important role in WLED.