Fabrication of Zinc phthalocyanines: Characterisation and optical properties

Abstract

In this study, Zinc phthalocyanines (ZnPc) materials were synthesised using two main methods: wet chemical synthesis and chemical vapour deposition (CVD). These methods help control the crystal size, morphology, and properties of the ZnPc material. To investigate the structural characteristics and properties of the material, various analytical techniques 
were employed, including X-ray diffraction (XRD), UV-Vis spectra, Raman scattering, and Fourier transform infrared  (FTIR) spectroscopy. The XRD results reveal that ZnPc has a β-phase crystal structure, with lattice constants a=19.4 Å and b=4.79 Å, indicating a specific oriented arrangement in the material. UV-Vis spectra provide information about the optical properties of ZnPc, showing strong absorption in the ultraviolet region and transmission in the visible range. FTIR and Raman spectra confirm the chemical bonding of ZnPc, revealing the presence of C-H, C-N, and C-C bonds characteristic of this molecular structure. These results suggest that ZnPc in the β-phase possesses excellent physicochemical properties, making it suitable for applications in optoelectronic devices, sensors, and solar energy research.