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Elsevier, Physics Procedia, (46), p. 142-148, 2013

DOI: 10.1016/j.phpro.2013.07.056

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Low Pressure Chemical Vapour Deposition of Crystalline Ga2Te3 and Ga2Se3 Thin Films from Single Source Precursors Using Telluroether and Selenoether Complexes

This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Neutral telluro- and seleno-ether complexes of the form [GaCl3((Bu2E)-Bu-n)] (E = Se, Te) and [(GaCl3)(2){(BuE)-Bu-n(CH2)(n)(EBu)-Bu-n}] (E = Se, n = 2; E = Te, n = 3) have been synthesised via a facile, high yielding reaction. These complexes have been shown to be suitable precursors for the low pressure chemical vapour deposition of Ga2Te3 and Ga2Se3, the first reported example of a telluroether complex being used for the deposition of a metal telluride. The thin films have been characterised by X-ray diffraction, SEM, EDX, Raman and Hall measurements. The films are crystalline, have good, uniform coverage and Raman spectra match literature values. Hall measurements show that the thin films are p-type semiconductors. Competitive deposition of Ga2Te3 onto photolithographically patterned SiO2/TiN substrates shows a preference for deposition onto TiN. (C) 2013 The Authors. Published by Elsevier B.V.