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Proceedings Paper

SnO2:Sb transparent conducting coatings made by different sol-gel processes
Author(s): G. Gasparro; Dietmar Ganz; C. Goebbert; Joerg Puetz; Michel Andre Aegerter
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Paper Abstract

Single and multilayer sol-gel coatings of transparent antimony-doped tin oxide (SnO2:Sb) have been prepared on borosilicate and fused silica substrates using either a 5 mole% SbCl3 doped 0.5 M solution of SnCl2(OAc)2 in ethanol or a water suspension of crystalline Sb-doped tin oxide nanoparticles. The nanoscale morphology and the electrical parameters of the layers have been determined after different firing procedures and heating rates varying from 0.2 to 4300 K/s obtained either in a furnace or by cw carbon- dioxide laser irradiation. For a given sintering temperature (approximately 540 degrees Celsius) a slow heating process in furnace leads to porous, homogeneous single and multilayers consisting of small crystallites. They present a high resistivity of about (rho) equals 4 multiplied by 10-2 (Omega) cm. With increasing heating rate the layers become denser with larger crystallites and the resistivity value decrease down to approximately 7 X 10-3 (Omega) cm for 4300 K/s (carbon-dioxide laser sintering). It is proposed that the densification of the coatings is determined by a competition between nucleation at low temperatures and the growth of the crystallites at high temperatures.

Paper Details

Date Published: 2 October 1997
PDF: 12 pages
Proc. SPIE 3136, Sol-Gel Optics IV, (2 October 1997); doi: 10.1117/12.284136
Show Author Affiliations
G. Gasparro, Institut fuer Neue Materialien (Germany)
Dietmar Ganz, Institut fuer Neue Materialien (Germany)
C. Goebbert, Institut fuer Neue Materialien (Germany)
Joerg Puetz, Institut fuer Neue Materialien (Germany)
Michel Andre Aegerter, Institut fuer Neue Materialien (Germany)

Published in SPIE Proceedings Vol. 3136:
Sol-Gel Optics IV
Bruce S. Dunn; John D. Mackenzie; Edward J. A. Pope; Helmut K. Schmidt; Masayuki Yamane, Editor(s)

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