Annealing temperature dependent structural and optical properties of electrodeposited CdSe thin films

作者：Mahato S^*; Shakti Nanda; Kar A K

来源：Materials Science in Semiconductor Processing, 2015, 39: 742-747.

DOI：10.1016/j.mssp.2015.06.019

• CdSe
• Thin film
• Electrodeposition
• XRD
• HRTEM
• UV-vis spectroscopy

Cadmium selenide films were synthesized using simple electrodeposition method on indium tin oxide coated glass substrates. The synthesized films were post annealed at 200 degrees C, 300 degrees C and 400 T. X-ray diffraction of the films showed the hexagonal structure with crystallite size <3 nm for as deposited films and 3-25 nm for annealed films. The surface morphology of films using field emission scanning electron microscopy showed granular surface. The high resolution transmission electron microscopy of a crystallite of the film revealed lattice fringes which measured lattice spacing of 3.13 angstrom corresponding to (002) plane, indicating the lattice contraction effect, due to small size of CdSe nanocrystallite. The calculation of optical band gap using UV-visible absorption spectrum showed strong red-shift with increase in crystallite size, indicating to the charge confinement in CdSe nanocrystallite.

• 出版日期2015-11