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High-slope photoconductive cells based on screen-printed and sintered cadmium sulfide; the long-term stability properties

J. FRANC1,* , S. NEŠPŮREK2

Affiliation

  1. J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Praha 8, Czech Republic
  2. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Praha 6, Czech Republic

Abstract

Photoconductive cells based on doped sintered cadmium sulfide were prepared by screen-printing. As a paste binder was used propylene glycol or glycerol sometimes thickened by poly(vinyl alcohol). Chlorides were used as fluxing agent and donor. Acceptors, 2 - 3 mg Cu or a mixture of 0.15 mg Ag, 0.75 mg Cu and 2.9 mg Mn per g of CdS, made it possible to prepare photoconductive cells with the slope (resistance vs. illumination) higher than 1.5. The long-term stability of cell parameters was unfavourably influenced by a higher content of chlorides and by the content of liquid paste components. The latter can be lowered by recrystallization of starting CdS powder. Also the delay time between drying and annealing of the printed layer can affect the long-term stability of resistance and slope of cells..

Keywords

Photoconductive cell, Cadmium sulfide, Sintering.

Submitted at: Oct. 31, 2006
Accepted at: July 15, 2007

Citation

J. FRANC, S. NEŠPŮREK, High-slope photoconductive cells based on screen-printed and sintered cadmium sulfide; the long-term stability properties, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 7, pp. 2205-2210 (2007)