Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-29T09:23:22.356Z Has data issue: false hasContentIssue false
  • English
  • Français

Raman Scattering and Photoluminescence Measurements on II-VI Semiconductor Nanocrystals as a Function of Pressure and Particle Size

Published online by Cambridge University Press:  15 February 2011

John Schroeder ,
Mierie Lee ,
Markus R. Silvestri ,
Lih-Wen Hwang  and
Peter D. Persans
John Schroeder
Affiliation:
Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180–3590
Mierie Lee
Affiliation:
Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180–3590
Markus R. Silvestri
Affiliation:
Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180–3590
Lih-Wen Hwang
Affiliation:
Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180–3590
Peter D. Persans
Affiliation:
Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180–3590
Get access

Abstract

Pressure tuned photoluminescence and Raman scattering were employed to study the structural phase transition from wurtzite to rocksalt structure of CdSxSei1-x nanocrystals embedded in a glass matrix as a composite material and in the colloidal form. In both the composite and the colloidal form the increased phase stability of the wurtzite to rocksalt structure is reversible and size dependent. In contrast the phase transition in bulk semiconductors of cadmium-sulfide is sharp but for the nanocrystals it is broad and occurs at higher pressures. A size dependent study of the phase stability was conducted and a correlation between size and increase in phase stability was definitely established. For the nanocrystals in the composite form the difference in surface tension in both phases allowed for a model that predicted the tendencies observed in optical spectra. For the colloidal nanocrystals a model based on surface tension and volume effects (defects) gave good agreement in explaining the observations. The above results are discussed with respect to surface tension and deep level defects and their pressure dependence.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 452 , 1996 , 329
Copyright
Copyright © Materials Research Society 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Muller, K.A. and Thomas, H., Structural phase transitions-I, Springer Verlag, Berlin, 1981.Google Scholar
2.Haase, M. and Alivisatos, A.P., J. Phys. Chem., 96, p. 6756 (1992).Google Scholar
3.Tolbert, S.H. and Alivisatos, A.P., Z. Phys. D, 26, p. 56 (1993).Google Scholar
4.Tolbert, S.H. and Alivisatos, A.P., J. Chem. Phys., 102, p. 4642 (1995).Google Scholar
5.Alivisatos, A.P., Bull. Mat. Res. Soc, 8, p. 23 (1995).Google Scholar
6.Goldstein, A.N., Echer, C.M., and Alivisatos, A.P., Science, 256, p. 1425 (1992).Google Scholar
7.Buffai, P. and Borei, J.P., Phys. Rev. A, 13, p. 2287 (1976).Google Scholar
8.Tolbert, S.H. and Alivisatos, A.P., Science, 265, p. 373 (1994).Google Scholar
9.Tolbert, S.H., Herhold, A.B., Johnsson, C.S., and Alivisatos, A.P., Phys. Rev. Lett., 73, p. 3266 (1994).Google Scholar
10.Alivisatos, A.P., Harris, T.D., Brus, L.E., and Jayaraman, A., J. Chem. Phys., 89, p. 5979 (1988).Google Scholar
11.Zhao, X.S., Schroeder, J., Persans, P.D., and Bilodeau, T.G., Phys. Rev. B, 43, p. 12580 (1991).Google Scholar
12.Zhao, X.S., Schroeder, J., Silvestri, M.R., Bilodeau, T.G. and Persans, P.D., in Clusters and Cluster Assembled Materials, ed. Averback, R.S., Bernholc, J., and Nelson, D.L., MRS Symposia Proceedings No. 206, (Materials Research Society, 1991 ), p. 151.Google Scholar
13.Schroeder, J. et al. , in Chemical Processes in Inorganic Materials: Metal and Semiconductor Clusters and Colloids, ed. Parsens, P.D., Bradley, J.S., Chianelli, R.R. and Schmid, G., MRS Symposia Proceedings No. 272, (Materials Research Society, 1990), p. 251.Google Scholar
14.Lawendy, N.M. and MacDonald, R.L., J. Opt. Soc. Am. B, 8, p. 1307 (1991).Google Scholar
15.Silvestri, M.R. and Schroeder, J., J. of Phys. Condensed Matter, 7, p. 8519 (1995).Google Scholar
16.Schroeder, J., Hwang, L.W., Silvestri, M.R., Lee, Mierie and Persans, P.D., J. Non-Crystalline Solids, 203, p. 217 (1996).Google Scholar
17.Persans, P.D. et al. , in Materials Issues in Microcrystalline Semiconductors, ed. Fauchet, P.M., Tanaka, K., and Tsai, C.C., MRS Symposia Proceedings No. 164, (Materials Research Society, 1990), p. 105.Google Scholar
18.Mei, G., Carpenter, S., Felton, L.E., and Persans, P.D., J. Opt. Soc. Am. B, 9, p. 1394 (1992).Google Scholar
19.Schroeder, J. and Kennendy, G., Encyclopedia of Physics, ed. Lerner, R. and Trigg, G. (VCH Press, 1990), p. 1315.Google Scholar
20.Silvestri, M.R. and Schroeder, J., Phys. Rev. B, 50, p. 15108 (1994).Google Scholar
21.Mitra, S.S., Brafman, O., Daniels, W.B. and Crawford, W.D., Phys. Rev., 186, p. 942 (1969),Google Scholar
Brafman, O. and Mitra, S.S., Proc. 2nd Inter. Conf. on light scattering in Solid, ed. Balkanski, M., Flammarion, Paris, 1971, p. 284.Google Scholar
22.Valkealahti, S. and Manninen, M., Z. Phys. D., 26, p. 255 (1993).Google Scholar