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Thickness oscillation effect in photoexpansion and photocontraction of amorphous selenium

M. POPESCU1,* , F. SAVA1, K. SHIMAKAWA2, Y. IKEDA3, V. BABIN4

Affiliation

  1. National Institute R&D of Materials Physics, Bucharest-Magurele, Romania
  2. Department of Electrical and Electronic Engineering, Gifu University, Gifu 501-1193, Japan
  3. YM Systems, Inc., Bldg #3, Kyoto Research Park, 600-8815, Japan
  4. National Institute for Optoelectronics, P. O. Box MG. 5, 077125 Bucharest-Magurele, Romania

Abstract

Thickness oscillations under light irradiation or by switching-off the light have been revealed in amorphous selenium films. The explanation was given in the frame of a theory that takes into account the balance between the expansion of the interchain distance due to electrical charging and better ordering of chains due to freedom of chains to accommodate into the structure as a result of the diminishing or increasing of the spatial hindrance..

Keywords

Amorphous selenium, Photoexpansion, Photocontraction, Thickness oscillations.

Submitted at: Sept. 12, 2007
Accepted at: Nov. 16, 2007

Citation

M. POPESCU, F. SAVA, K. SHIMAKAWA, Y. IKEDA, V. BABIN, Thickness oscillation effect in photoexpansion and photocontraction of amorphous selenium, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 11, pp. 3558-3562 (2007)