Abstract
A series of cobalt phthalocyanine (CoPc) thin films deposited on n-type silicon substrate were studied using micro-Raman spectroscopy. The CoPc thin layers have been deposited at room temperature by the quasi-molecular beam evaporation. The micro-Raman scattering spectra of CoPc thin films were investigated in the spectral range 550–1650 cm − 1 using different excitation wavelengths (488 nm and 785 nm). Moreover, using surface mapping we also obtained information from polarized Raman spectra connected with polymorphic phase of CoPc layer before and after annealing procedure. The Raman modes A 1g and B 1g are connected with different polymorphic of metallophthalocyanine phases (α and β form) of CoPc thin films. During heating and cooling procedure the change of molecular symmetry, from D 4h to C 4v, has been revealed. The observed behavior of Raman spectra is probably connected with central atom ion (Co) position in molecular ring of metallophthalocyanine and its distortion from planarity. The obtained results showed also the influence of the annealing process on the ordering of the molecular structure of CoPc thin films deposited on n-type silicon substrate.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.