Chemical Deposition Of Highly Photosensitive CDs Thin Films And Their Prospects In Thin Film Solar Cells

12 November 1987

proceedings article
Published by SPIE-Intl Soc Optical Eng

p. 256-264
https://doi.org/10.1117/12.941918

Abstract

CdS thin films of high quality with good reproducibility can be prepared on large-area substrates from aqueous baths, icontaining triethanolamine complex of Cd²⁺ ions and thiourea. Depending on the deposition para-meters, a combination of optoelectronic cha-racteristics are obtainable: optical transmi-ssioii, 10.7 q80%; photocnductivity, up to 3 ohm^-1 cm^-1 (at 300 W/m² sim. solar); photo; conductivity to dark conductivity ratio, 10° to 10⁹ and phstocurrent decay time , a few seconds to -10³ s. Absorber layers (p-type) of lower band gap, of the CuxS or CuInS₂ type, with low sheet resistivities have been subsequently chemically deposited on these CdS films. This suggests the possibility of developing 'all-chemically deposited' thin film solar cells.

Keywords

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