Nanocrystalline CdSe thin films of different morphologies in thermal evaporation process.
Cadmium selenide nanocrystalline thin films of quasi-spherical morphology are prepared by evaporating CdSe nanopowders on glass substrates. Slightly oval shaped CdSe particles of about 165 nm average size (in 2-D) could be assembled over glass substrates by controlling the film thickness. Morphologies like assembly of particles, interconnected particles with mosaic-like structures and thin films of smooth surfaces could be prepared simply by controlling film thickness. A mechanism for such morphological variations is proposed. Observed variation of band gap energy in the films is explained in terms of quantum confinement effect and substrate-film interface strain.
Pal
U
U
Instituto de Física, Universidad Autónoma de Puebla, Apdo. Postal J-48, Puebla, Pue. 72570, Mexico.
Zaldivar
M Herrera
MH
Sathyamoorthy
R
R
Manjuladevi
V
V
Sudhagar
P
P
Mohan
S Chandra
SC
Senthilarasu
S
S