Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-27T02:04:21.146Z Has data issue: false hasContentIssue false
  • English
  • Français

Lead Sulphide Quantum-Sized Particles With Absorption Band Onset in the Near Infra Red

Published online by Cambridge University Press:  10 February 2011

J.C. Bhat ,
T. Krishnakumar ,
R.R. Nayak ,
O.V. Salata ,
J.L. Hutchison  and
P.J. Dobson
J.C. Bhat
Affiliation:
Department of Engineering Science, University of Oxford, Parks Road, Oxford, OX1 3PJ.
T. Krishnakumar
Affiliation:
Department of Engineering Science, University of Oxford, Parks Road, Oxford, OX1 3PJ.
R.R. Nayak
Affiliation:
Department of Materials Science, University of Oxford, Parks Road, Oxford, OX1 3PH.
O.V. Salata
Affiliation:
Department of Engineering Science, University of Oxford, Parks Road, Oxford, OX1 3PJ.
J.L. Hutchison
Affiliation:
Department of Materials Science, University of Oxford, Parks Road, Oxford, OX1 3PH.
P.J. Dobson
Affiliation:
Department of Engineering Science, University of Oxford, Parks Road, Oxford, OX1 3PJ.
Get access

Abstract

Lead sulphide nanoparticles were prepared by colloidal techniques and subsequently deposited onto glass slides as uniform, dry films. In so doing, the effective bandgap of the semiconductor was increased from that of the bulk material by the quantum size effect. By varying the growth conditions, it was possible to change the mean particle size from 3nm to 7nm. This size variation was accompanied by (i) a variation in the absorption band onset of the material from 0.7μm to 1.3μm and (ii) a change in its colour from red to greyish-brown. No excitonic features were observed. TEM showed that the shape of the particles, as well as their size, was dependent on the growth conditions. Cubic and rod-like particles were grown in aqueous solution. Spherical particles preferable for optoelectronic devices were grown in methanolic/aqueous and aqueous solutions. However, these spherical particles were not as reproducible as the cubic ones.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 421: Symposium D – Compound Semiconductor Electronics and Photonics , 1996 , 145
Copyright
Copyright © Materials Research Society 1996

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

[1] Chiu, G. and Meehan, E. J., J. Colloid Interface Sci., 49, p. 160 (1974)Google Scholar
[2] Murray, C. B., Norris, D. J., and Bawendi, M. G., J. Am. Chem. Soc. 115, p. 8706 (1993)Google Scholar
[3] Khosravi, A. A., Kunu, M., Kuruvilla, B. A., Shekhawat, G. S., Gupta, R. P., Sharma, A. K., Vyas, P. D., and Kulkarni, S. K., Appl. Phys. Lett. 67, p. 2506 (1995)Google Scholar
[4] Rossetti, R., Hull, R., Gibson, J. M., Brus, L. E., J. Chem. Phys 83, p. 1406 (1985)Google Scholar
[5] Lianos, P. and Thomas, J. K., Chem. Phys. Lett. 89 p. 2720 (1986)Google Scholar
[6] Salata, O. V., Dobson, P. J., Hull, P. J., and Hutchison, J. L., Adv. Mater. 6, p. 772 (1994)Google Scholar
[7] Gacoin, T., Train, C., Chaput, F., Boilot, J.-P., Aubert, P., Gandais, M., and Wang, Y., SPIE 1758, p. 565 (1992)Google Scholar
[8] Chemseddine, A. and Weller, H., Ber. Bunsenges. Phys. Chem. 97, p. 636 (1993)Google Scholar
[9] Salata, O. V., Dobson, P. J., Sabesan, S., Hull, P. J., Hutchison, J. L., Thin Solid Films (in press)Google Scholar
[10] Dabbousi, B.O., Bawendi, M.G., Onitsuka, O., and Rubner, M.F., Appl. Phys. Lett., 66, p. 1316 (1995)Google Scholar
[11] Colvin, V. L., Schlamp, M. C., and Alivisatos, A. P., Nature 370, p. 354 (1994)Google Scholar
[12] Nagamune, Y., Watabe, H., Nishioka, M., and Arakawa, Y., Appl. Phys. Lett., 67, p. 3257 (1995)Google Scholar
[13] Meehan, E. J. and Erdmann, D. J., J. Colloid Interface Sci., 62, p. 8 (1977)Google Scholar
[14] Kyprianidou-Leodidou, T., Caseri, W., and Suter, U. W., J. Phys. Chem. 98, p. 8992 (1994)Google Scholar
[15] Uhler, A. D. and Helz, G. R., J. Crystal Growth 66, p. 401 (1984)Google Scholar
[16] Gallardo, S., Gutierrez, M., Henglein, A. and Janata, E., Ber. Bunsenges., Chem., 93, p. 1080 (1989)Google Scholar
[17] Wang, Y., Suna, A., Mahler, W. and Kasowski, R., J. Chem. Phys., 87, p. 7315 (1987)Google Scholar
[18] Nenadovic, M. T., Comor, M. I., Vasic, V. and Micic, O. I., J. Phys. Chem., 94, p. 6390 (1990)Google Scholar
[19] Cardona, M. and Greenaway, D. L., Physical Review 133 p. A1685 (1964)Google Scholar
[20] Machol, J. L., Wise, F. W., Patel, R., Tanner, D. B., Physica A, 207, p. 427 Google Scholar