Investigation on structural, optical, morphological, electrical, mechanical and biological activities of pure and crystal violet dye-doped epsomite single crystals

Crystal violet dye-doped Magnesium sulphate single crystal were grown using the slow evaporation technique. Powder X-ray diffraction and Fourier transform-infrared spectroscopy (FT-IR) investigations were used to investigate their purity, crystallinity, lattice parameters, and functional modes. Using elemental analysis, the Mg ion concentration of the dye crystals was verified. The dyed crystal's diffused reflectance spectrum analysis revealed a distinct absorption band at 490 nm, which was attributable to the dye's presence. The non-dyed and coloured crystals' computed band gaps were 4.53 and 4.57 eV, respectively. The photoluminescence spectra of the CV-doped MgSO₄ crystals revealed a blue emission peak at 691 nm. In addition, antimicrobial properties of grown crystals were investigated. To investigate the considerable improvements in the corresponding characteristics of dye-doped crystals, dielectric and photoconductivity tests were carried out. The results proved the dye-doped MgSO₄ crystals suitability for use in optoelectronic devices. The grown crystal is applicable for both biomedical and optoelectronic applications.