Polarized light emission from a calamitic liquid crystalline semiconductor doped with dyes

Abstract
Liquid crystal cells containing a homogeneously aligned calamitic liquid crystalline semiconductor, 2-(4-octylphenyl)-6-dodecyloxynaphthalene, doped with dyes such as 3-(2-benzothiazolyl)7-diethylaminocoumarin, emitted a visible light when a dc bias was applied. This light emission occurred irrespective of phase, and polarized light emission was well established in the Smectic B phase. The unique features of the calamitic liquid crystalline semiconductors are also discussed from a practical viewpoint.