Author/Authors :
MEMON, Ashfaque Ahmed Shah Abdul Latif University - Department of Chemistry, Pakistan , DILSHAD, Malik University of Zululand - Department of Chemistry, South Africa , REVAPRASADU, Neerish University of Zululand - Department of Chemistry, South Africa , MALIK, Mohammad Azad University of Manchester - School of Chemistry, UK , RAFTERY, James University of Manchester - School of Chemistry, UK , AKHTAR, Javeed University of Azad Jummu Kashmir - Department of Chemistry, Pakistan , AKHTAR, Javeed COMSATS Institute of Information Technology - Department of Physics, Polymers Materials Synthesis (PMS) Lab, Pakistan
Abstract :
New complexes with the general formula [M(S 2 CN^n Bu 2)2 ] [where M = Cd^II (1) and Zn^II (2)] were synthesized and used as single source precursors to deposit thin films of cadmium sulfide and zinc sulfide by the aerosol-assisted chemical vapor deposition technique. The single crystal X-ray structures of 1 and 2 are also reported. Thermogravimetric analysis of 1 and 2 showed that both precursors decompose cleanly in a single step to produce their respective metal sulfides. The deposition of thin films was carried out on soda glass substrates in the 350–450 °C temperature range under inert conditions. The as-deposited thin films were characterized by powdered X-ray diffraction and field emission scanning electron microscopy. Thin films of CdS deposited at low temperature (350 °C) consist of densely packed granular crystallites with an average size of ca. 150 nm, while at higher temperatures (400 and 450 °C) particles with varying sizes and mixed morphologies are observed. The ZnS thin films deposited at 400 °C showed rod-like structures, whereas dense globular-like structures were obtained at 450 °C. Energy dispersive X-ray analysis was performed to study the chemical composition of the thin films.
Keywords :
Thin films , AACVD , molecular precursor , single crystal , ZnS thin films
