Title :
Effect of deposition time on optical properties of nanocrystalline CdS thin films synthesized via rf- sputtering technique
Author :
Ghosh, P.K. ; Ahmed, Sk F. ; Saha, B. ; Chattopadhyay, K.K.
Author_Institution :
Abhedananda Mahavidyalaya, Sainthia
Abstract :
Nanocrystallites of cadmium sulfide (CdS) thin films have been deposited by radio frequency magnetron sputtering technique. XRD and TEM diffraction patterns have confirmed the nanocrystalline cubic CdS phase formation. The intensity of XRD peaks also increases with the increase of deposition time that implies that better crystallinity takes place at higher deposition time. TEM micrographs of the films have revealed the manifestation of nano CdS phase with average particle size lying in the range 2.00 nm to 5.36 nm. UV-VIS spectrophotometric measurement showed high transparency of the film with a blue-shift of the absorption edge. The direct optical bandgap values of the films increased with the increase of deposition time and lie in the range from 3.06 - 3.94 eV.
Keywords :
X-ray diffraction; cadmium compounds; energy gap; nanostructured materials; optical properties; sputtering; transmission electron microscopy; CdS; TEM; UV VIS spectrophotometric measurement; XRD; deposition time; diffraction patterns; electron volt energy 3.06 eV to 3.94 eV; nanocrystalline CdS thin films; optical bandgap; optical properties; phase formation; radio frequency magnetron sputtering; size 2.00 nm to 5.46 nm; Cadmium compounds; Crystallization; Nanoparticles; Optical films; Optical scattering; Physics; Sputtering; Substrates; Transistors; X-ray scattering; Nanocrystalline Cadmiumsulfide thin films; Nanostructural; Opticalstudies;
Conference_Titel :
Physics of Semiconductor Devices, 2007. IWPSD 2007. International Workshop on
Conference_Location :
Mumbai
Print_ISBN :
978-1-4244-1728-5
Electronic_ISBN :
978-1-4244-1728-5
DOI :
10.1109/IWPSD.2007.4472535
