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Nanocrystalline CdSe thin films of different morphologies in thermal evaporation process

Pal, U.; Zaldivar, M. Herrera; Sathyamoorthy, R.; Manjuladevi, V.; Sudhagar, P.; Mohan, S. Chandra; Senthilarasu, S.

Authors

U. Pal

M. Herrera Zaldivar

R. Sathyamoorthy

V. Manjuladevi

P. Sudhagar

S. Chandra Mohan



Abstract

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.

Journal Article Type Article
Publication Date Dec 1, 2008
Deposit Date Mar 14, 2023
Print ISSN 1533-4880
Publisher American Scientific Publishers
Peer Reviewed Peer Reviewed
Volume 8
Issue 12
Pages 6474-6480
DOI https://doi.org/10.1166/jnn.2008.18410
Keywords cdse thin films, morphology, nanocrystalline, optical properties