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.

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.

Citation

Pal, U., Zaldivar, M. H., Sathyamoorthy, R., Manjuladevi, V., Sudhagar, P., Mohan, S. C., & Senthilarasu, S. (2008). Nanocrystalline CdSe thin films of different morphologies in thermal evaporation process. Journal of Nanoscience and Nanotechnology, 8(12), 6474-6480. https://doi.org/10.1166/jnn.2008.18410

• 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