Abstract
InAs-SiO2 nanocrystal-embedded films were prepared by using radio-frequency cosputtering. The growth behavior of InAs in the composite film has been studied by a transmission electron microscope. It has been found that with the increasing substrate temperature, InAs in the matrix undergoes transitions from an initial dispersed phase to a fractal structure of the lnAs phase, then to nucleation, and finally to grain growth. Large blueshift of the optical absorption edges of the films was observed from the optical absorption spectra. The relationship between the blueshift of optical absorption edge and the average size of the nanocrystals has been explained by the effective-mass approximation.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Kippelen, B., Levy, R., Faller, P.et al., Picosecond excite and probe nonlinear absorption measurements in CuCl quantum dots,Appl. Phys. Lett., 1991, 59(26): 3378.
Yasuaki, M., Tomohiro, K., Koh, E., Biexiton lasing in CuCl quantum dots,Appl. Phys. Lett., 1993, 62(3):225.
Ekimov, A. I., Efros, Al. L., Onushchenko, A.A., Quantum size effect in semiconductor microcrystats,Solid State Communications, 1985, 56(11):921.
Lippens, P.E., Lannoo, M., Comparison between calculated and experimental values of the lowest excited electronic state of small CdSe crystallites,Phys. Rew. B, 1990, 41(9):6079.
Yang, X. P., Zhang, W., Cheng, Z. G.et al., Study on self-organized InAs quantum dots on GaAs(100) substrate,Acta Semiconductor (in Chinese), 1996, 17(11):869.
Lubyshev, D. I., Gonzalez-Borrem, P. P., Marega, E.et al., Exciton localization and temperature stability in self-organized InAs quantum dots,Appl. Phys. Lett., 1996, 68(2):205.
Baru, V.G., Chernushich, A. P., Luzannov, V. A.et al., Optical properties of Si nanocrystals prepared by magnetron sputtering,Appl. Phys. Lett., 1996, 69(27): 4148.
Yosuka, K., Quantum-size effect of interacting electrons and holes in semiconductor microcrystals with spherical shape,Phys. Rew. B, 1988, 38(14):9797.
Brus, L.E., Electron-electron and electron-hole interactions in small semiconductor crystallites: The size dependence of the lowest exited electronic state,J. Phys. Chem., 1984, 80(9):4403.
Author information
Authors and Affiliations
About this article
Cite this article
Shi, J., Zhu, K., Yao, W. et al. Preparation and optical absorption of InAs nanocrystal-embedded thin films. Chin.Sci.Bull. 44, 210–214 (1999). https://doi.org/10.1007/BF02896275
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02896275