Comparative study of annealed and high temperature grown ITO and AZO films for solar energy applications

Alonso-Álvarez, D., Ferre Llin, L., Mellor, A., Paul, D. J. and Ekins-Daukes, N. J. (2017) Comparative study of annealed and high temperature grown ITO and AZO films for solar energy applications. MRS Advances, 2(53), pp. 3117-3122. (doi: 10.1557/adv.2017.448)

Abstract

We present the optical and electrical properties of ITO and AZO films fabricated directly on silicon substrates under several growth and annealing temperatures, as well as their potential performance when used as low emissivity coatings in hybrid photovoltaic-thermal systems. We use broadband spectroscopic ellipsometry measurements (from 300 nm to 20 μm) to obtain a consistent model for the permittivity of each of the films. The best performance is found using the properties of the ITO film grown at 250 °C, with a state of the art resistivity of 0.2 mΩ-cm and an optimized thickness of 75 nm which leads to an estimated 50% increase in the extracted power compared to a standard diffused silicon solar cell. The Hall mobility and resistivity measurements of all the films are also provided, complementing and supporting the observed optical properties.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Ferre Llin, Dr Lourdes and Paul, Professor Douglas
• Authors: Alonso-Álvarez, D., Ferre Llin, L., Mellor, A., Paul, D. J., and Ekins-Daukes, N. J.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: MRS Advances
• Publisher: Cambridge University Press
• ISSN: 2059-8521
• ISSN (Online): 2059-8521
• Published Online: 19 June 2017
• Copyright Holders: Copyright © 2017 Materials Research Society
• First Published: First published in MRS Advances 2(53):3117-3122
• Publisher Policy: Reproduced in accordance with the publisher copyright policy