Abstract
Differential (wavelength-modulated) absorption of sulfoselenide solid-solution nanocrystals has been studied in a glassy fluorophosphate matrix near the fundamental absorption edge at 360–620 nm. The observed oscillations in the absorption are attributed to size quantization of electrons and holes under strong quantum-confinement conditions. The sulfur content in the mixed semiconductor has been refined from Raman scattering spectra in CdSxSe1−x samples with x=0.30, and the nanocrystal size (R≅30 Å) has been derived from low-frequency Raman scattering spectra. These data were used to calculate the energies of electron-hole transitions in nanocrystals of mixed composition, and their subsequent comparison with experiment. The calculations were found to be in a good agreement with the observed experimental absorption spectrum for nanocrystals about 45 Å in size. The applicability of band-structure simulation for a nonspherical nanocrystal grown in a fluorophosphate glass matrix is discussed.
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References
N. Peyghambarian, H. Tajalli, E. M. Wright, S. W. Koch, S. I. Najafi, D. Hulin, and J. MacKenzie, Crit. Rev. 53, 211 (1994).
J. Yumoto, S. Fukushima, and K. Kubodera, Opt. Lett. 12, 832 (1987).
Al. L. Efros and A. A. Efros, Fiz. Tekh. Poluprovodn. 16, 1209 (1982) [Sov. Phys. Semicond. 16, 772 (1982)].
G. B. Grigoryan, É. M. Kazaryan, Al. L. Efros, and T. V. Yazeva, Fiz. Tverd. Tela (Leningrad) 32, 1772 (1990) [Sov. Phys. Solid State 32, 1031 (1990)].
A. I. Ekimov, Al. L. Efros, and A. A. Onushchenko, Solid State Commun. 56, 921 (1985).
A. I. Ekimov, F. Hache, M. C. Schanne-Klein, D. Ricard, C. Flytzanis, A. I. Kudryavtsev, T. V. Yazeva, A. V. Rodina, and Al. L. Efros, J. Opt. Soc. Am. B 10, 100 (1993).
C. B. Murray, D. J. Norris, and M. G. Bawendi, J. Am. Chem. Soc. 115, 8706 (1993).
A. A. Lipovskii, E. V. Kolobkova, and V. D. Petrikov, J. Cryst. Growth 184/185, 365 (1998).
E. V. Kolobkova, A. A. Lipovskii, N. V. Nikonorov, and A. A. Sitnikova, Phys. Status Solidi A 147, K65 (1995).
V. A. Gaisin, B. V. Novikov, D. L. Fedorov, M. A. Jastrebova, E. V. Kolobkova, A. A. Lipovskii, and V. D. Petrikov, in Proceedings of the 2nd International Conference on Excitonic Processes in Condensed Matter (Dresden, 1996), p. 135.
V. A. Gaisin, E. V. Kolobkova, A. A. Lipovskii, B. V. Novikov, V. D. Petrikov, D. L. Fedorov, and M. A. Yastrebova, Abstracts of the 1st International Conference on Highly-Organized Compounds (St. Petersburg, 1996), p. 53.
J. M. Luttinger, Phys. Rev. 102, 1030 (1956).
D. J. Norris and M. G. Bawendi, Phys. Rev. B 53, 16338 (1996).
D. J. Norris, A. Sacra, C. B. Murray, and M. G. Bawendi, Phys. Rev. Lett. 72, 2612 (1994).
K. L. Stokes, H. Yukselici, and P. D. Persans, Solid State Commun. 92, 195 (1994).
A. Tu and P. D. Persans, Appl. Phys. Lett. 58, 1506 (1991).
B. Champagnon, B. Andrianasolo, A. Ramos, M. Gandais, M. Allais, and J.-P. Benoit, J. Appl. Phys. 73, 2775 (1993).
E. Duval, A. Boukenter, and B. Champagnon, Phys. Rev. Lett. 56, 2052 (1986).
T. Bischof, M. Ivanda, G. Lermann, A. Materny, W. Keifer, and J. Kalus, J. Raman Spectrosc. 27, 297 (1996).
A. V. Baranov, Ya. S. Bobovich, and V. I. Petrov, J. Raman Spectrosc. 24, 767 (1993).
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Fiz. Tverd. Tela (St. Petersburg) 41, 1505–1510 (August 1999)
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Gaisin, V.A., Karpov, S.V., Kolobkova, E.V. et al. Quantum confinement in CdSxSe1−x spherical nanocrystals in a fluorophosphate glass matrix. Phys. Solid State 41, 1378–1382 (1999). https://doi.org/10.1134/1.1131002
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DOI: https://doi.org/10.1134/1.1131002