Exploring the photoluminescence behavior of antiferroelectric liquid crystals through graphene oxide dispersion

Abstract

The photoluminescence properties of antiferroelectric liquid crystal (AFLC) dispersed with graphene oxide (GO) were studied. AFLC-based composites were prepared by dispersing various weight concentrations (0.1 % and 0.3 % wt./wt.) of GO into AFLC. UV absorbance studies were performed using spectrum, time scan, and overlay modes. The decrease in UV absorbance was observed in all of these modes. Red shifts in absorbance bands were observed for both pure AFLC sample and GO/AFLC composite. The UV absorbance maxima for AFLC dispersed with GO shifted from 317.27 nm to 324.57 nm. This shift was attributed to the varying concentrations of GO in the AFLC medium. A significant improvement in the luminescence intensity of AFLC dispersed with GO nanoparticles mixtures was observed. The luminescence intensity increased from 0.3 (pure AFLC) to 1.0 (0.3 % wt./wt.). Furthermore, the luminescence intensity of the AFLC mixture was observed to increase with the concentration of GO for the fixed weight of the AFLC sample. © 2025 Korean Physical Society