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Proceedings Paper

Photovoltaic effect in thin film CdS-CdTe heterojunctions treated on CdCl2
Author(s): Petru A. Gashin; Tamara Potlog; Oleg Shapoval; Lidia Ghimpu; Vladimir Fedorov; Petru I. Ketrush
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Paper Abstract

Solar cells (SC) CdS-CdTe were fabricated by successive deposition of CdS and CdTe layers onto a glass substrate with the area 4 cm2 covered by ITO layer using hot wall transport. CdS layers had the thickness 0.8 - 2.0 micrometers , the resistivity (2.0 - 2.8)*104(Omega) *cm and transparency of 65 - 70%. CdTe layers were As doped during growth process and had the resistivity (3 - 7)*105(Omega) *cm. At the illumination of CdS-CdTe heterojunctions with an integral light with the intensity of 80 mW/cm2 (AM1.5) the short circuit current is ISC equals 0.4 - 0.6 mA/cm2 and open circuit voltage is UOC equals 0.4 V. For to enhance photoelectrical parameters the heterostructures were immersed in CdCl2:CH3OH, and then were heat treated in the air. The examination of treatment time and temperature had shown that the optimum temperature is 400 degree(s)C and time interval 40 - 45 min. The illumination of treated structures in the same conditions as non treated had shown that short circuit current reaches ISC equals 16.8 mA/cm2 and open circuit voltage UOC equals 0.54 V. The photosensitivity region is also broadening. Homogeneous photosensitivity in the region from 0.5 micrometers to 0.9 micrometers is observed.

Paper Details

Date Published: 8 March 1995
PDF: 3 pages
Proc. SPIE 2461, ROMOPTO '94: Fourth Conference in Optics, (8 March 1995); doi: 10.1117/12.203606
Show Author Affiliations
Petru A. Gashin, State Univ. of Moldova (Moldova)
Tamara Potlog, State Univ. of Moldova (Moldova)
Oleg Shapoval, State Univ. of Moldova (Moldova)
Lidia Ghimpu, State Univ. of Moldova (Moldova)
Vladimir Fedorov, State Univ. of Moldova (Moldova)
Petru I. Ketrush, State Univ. of Moldova (Moldova)

Published in SPIE Proceedings Vol. 2461:
ROMOPTO '94: Fourth Conference in Optics
Valentin I. Vlad, Editor(s)

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