Issue 46, 2008
From the journal:

Journal of Materials Chemistry

Tuning the size and color of the p-type wide band gap delafossite semiconductor CuGaO2 with ethylene glycol assisted hydrothermal synthesis

Radhakrishnan Srinivasan,a   Benoit Chavillon,a   Charlotte Doussier-Brochard,a   Laurent Cario,*a   Michael Paris,a   Eric Gautron,a   Philippe Deniard,a   Fabrice Odobelb  and  Stéphane Jobica  

* Corresponding authors

a Institut des Matériaux Jean Rouxel, Université de Nantes, CNRS, 2 rue de la Houssinière, Nantes cedex 3, France
E-mail: laurent.cario@cnrs-imn.fr
Fax: +33 240373995
Tel: +33 240373948

b CEISAM, Université de Nantes, CNRS, 2 rue de la Houssinière, Nantes cedex 3, France

Abstract

Delafossite CuGaO2 is a prototype p-type transparent semiconducting oxide. We report here a new ethylene glycol (EG) mediated hydrothermal synthesis route to this material from soluble hydrated metal nitrates. We found that EG acts as a reducing agent which eases the formation of CuGaO2 by stabilizing Cu(I) at low temperature in hydrothermal conditions. Moreover, we observed that the initial pH of the precursors solution is a key parameter to tune the particle sizes (from 2 µm to 300 nm) and subsequently the color (from dark brown to light gray) of the CuGaO2 powder. The optimal synthesis conditions to obtain the brightest product are described. In these conditions, the CuGaO2 powder exhibits a pale grayish color and contains 300 nm large nano-layered particles approximately 20 nm thick.

Graphical abstract: Tuning the size and color of the p-type wide band gap delafossite semiconductor CuGaO2 with ethylene glycol assisted hydrothermal synthesis

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Article information

DOI
https://doi.org/10.1039/B810064K
Article type
Paper
Submitted
13 Jun 2008
Accepted
10 Sep 2008
First published
24 Oct 2008

J. Mater. Chem., 2008,18, 5647-5653

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Tuning the size and color of the p-type wide band gap delafossite semiconductor CuGaO2 with ethylene glycol assisted hydrothermal synthesis

R. Srinivasan, B. Chavillon, C. Doussier-Brochard, L. Cario, M. Paris, E. Gautron, P. Deniard, F. Odobel and S. Jobic, J. Mater. Chem., 2008, 18, 5647 DOI: 10.1039/B810064K

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