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Doped cadmium sulfide particles in polymer matrix: X-ray diffraction, optical reflectivity and photoconductivity study

J. FRANC1,* , S. NEŠPŮREK1, M. V. MAKAROVA1, P. KRTIL2

Affiliation

  1. J. Heyrovský Institute of Physical Chemistry of ASCR, v.v.i., Dolejškova 3, 18223 Praha 8, Czech Republic
  2. Institute of Macromolecular Chemistry of ASCR, v.v.i., Heyrovský Sq. 2, 162 06 Praha 6, Czech Republic

Abstract

Photosensitive powders of cadmium sulphide doped with donors (Cl-, from 0 to 41 mg/g CdS) and acceptors (Cu2+ and Ag+, from 0 to 9 mg/g CdS) were characterized by granulometry, scanning electron microscopy, X-ray diffraction and optical reflectivity spectra. Incorporation of chloride ions caused the increase of band gap energy from 2.27 to 2.38 eV. Polystyrene, poly(methyl methacrylate), poly(N-vinylcarbazole), poly(bisphenol A carbonate) and epoxy resin were used as binders in pastes containing powders. Layers prepared from the pastes were characterized by reflectivity spectra and photonductivity. The layers composed of powders with low doping levels and binders containing bisphenol A group in the chain exhibited the highest photoconductivity..

Keywords

Cadmium sulfide, Doping, Polymer binder, Photoconductivity, Optical reflectivity.

Submitted at: Feb. 4, 2008
Accepted at: March 17, 2008

Citation

J. FRANC, S. NEŠPŮREK, M. V. MAKAROVA, P. KRTIL, Doped cadmium sulfide particles in polymer matrix: X-ray diffraction, optical reflectivity and photoconductivity study, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 3, pp. 520-527 (2008)