High-throughput methods to optically functional oxide and oxide-nitride materials

Henderson, S.J., Armstrong, J.A., Hector, A.L. and Weller, M.T. (2005) High-throughput methods to optically functional oxide and oxide-nitride materials. Journal of Materials Chemistry, 15 (15), 1528-1536. (doi:10.1039/b415808c).

Abstract

High-throughput methods have been used for the synthesis and preliminary characterisation of optically functional ceramic oxide and oxide-nitride materials on an alumina substrate. Gel routes have been investigated for their viability when used with a Teflon masking system. Three different systems and deposition methodologies have been studied. The first system uses a polymer complex method based on citric acid and ethylene glycol in aqueous media to create arrays of the formula Ca_1-xSr_xZr_1-yCryO₃ (0≤x≤1, in 0.2 steps; 0≤y≤0.24, in 0.03 steps) annealed at temperatures of 600, 800, 1000 and 1200 degrees C. A metal alkoxide sol-gel method using an acetic acid-acetic anhydride solvent has been employed to produce arrays of oxides and oxide nitrides with the general formulae SrZr_1-xTa_xO₃ and SrZr_1-xTa_xO_2+xN_1-x (0≤x≤1, in 0.2 steps). Arrays of aluminium-doped zinc oxides, as potential transparent conducting oxides, have been produced through hydrolysis of a zinc acetate-ethylene glycol precursor using aluminium nitrate solutions while tin-doped indium oxides were obtained by direct evaporation and calcination of indium and tin solutions. Conversion of these oxide arrays to oxide-nitride arrays was carried out by reaction of the deposited SrZr_1-xTa_xO₃ materials under high purity flowing ammonia. Initial characterisation of arrays has been undertaken using powder X-ray diffraction, scanning electron microscopy and UV-vis spectroscopy.

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