Optical, dielectric, Hirshfeld surface analysis, mechanical, and photoacoustic spectroscopy of glycine nickel dichloride dihydrate single crystal for optoelectronic devices

Glycine Nickel Dichloride Dihydrate (GNDD) single crystals were grown from an aqueous solution using the slow evaporation method. This material has a monoclinic crystalline structure. O⋅⋅⋅H (16.8%), H⋅⋅⋅H (23.4%), C⋅⋅⋅H (2.0%), C⋅⋅⋅O (0.8%), and O⋅⋅⋅O (2.8%) hydrogen bonding interactions are calculated using the Hirshfeld surface analysis. Powder X-ray diffraction (PXRD) was used to record the pattern of the formed crystal’s diffraction peaks. The existence of distinct functional groups of GNDD was discovered using analysis of the FT-IR and FT-Raman spectra, respectively. According to the UV–Vis–NIR spectrum analysis, the GNDD crystal is see-through between 200 and 1100 nm. Blue light at 421 nm has been detected coming from GNDD, according to PL research. Vickers microhardness testing was used to examine mechanical characteristics. Analysis of etch pits demonstrates the presence of linear patterns. A wide range of temperatures and frequencies (50 Hz–2 MHz) were used to calculate the dielectric constant and dielectric loss of GNDD crystal. After that, the crystal was utilized for photoacoustic spectroscopy analysis and to determine the thermal diffusivity. The grown GNDD crystal is recommended for optoelectronic device applications.