Abstract
ABSTRACT Fluorescent liquid crystalline compounds have been the focal point of research due to their rich applications in organic optoelectronics. Fluorescent dyes have also found great applications in the development of random lasers and non-linear optics. Other than that, materials with high fluorescence intensity and quantum yield have been very desirable for various electro-optical applications over the years. We have attempted to engineer a highly fluorescent nematic liquid crystalline compound (4′-pentyl-4-biphenylcarbonitrile/5CB) with high quantum yield by doping anthracene dye. We have obtained the desired increase in fluorescence intensity due to anthracene being fluorescent as well and a further significantly high quantum yield for higher concentrations of anthracene in the nematic compound. The reduction in non-emissive radiations and the increase in the concentration of fluorophores in the excited state can be held responsible for this increased quantum yield. Lifetime of the fluorophores has been found to increase with the increase in the dye concentration. The obtained results make the anthracene-doped 5CB compound highly desirable for various device applications.
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