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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

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Characterisation of Cu(In,Ga)Se-2-based thin film solar cells on polyimide

Zachmann, H. and Heinker, S. and Braun, A. and Mudryi, A.V. and Gremenok, V.F. and Ivaniukovich, A.V. and Yakushev, M.V. (2009) Characterisation of Cu(In,Ga)Se-2-based thin film solar cells on polyimide. Thin Solid Films, 517 (7). pp. 2209-2212. ISSN 0040-6090

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Abstract

Thin films of Cu(In,Ga)Se2 (CIGS) were deposited at temperatures below 450 °C on polyimide (PI) substrates coated with Mo in a roll-to-roll set up by a combination of co-evaporation and ion-beam techniques. Flexible solar cells ITO/i-ZnO/CdS/CIGS/Mo/PI with and without Na incorporation were then fabricated. The films and solar cells were examined by: X-ray fluorescence spectroscopy (XRF) and Auger electron spectroscopy (AES), to determine the elemental composition, as well as by X-ray diffraction for structure- and scanning electron microscopy (SEM) for morphology-analysis. Photoluminescence (PL) and PL-excitation (PLE) at temperatures from 4.2 to 78 K were also used to estimate the band-gap energy of CIGS, examine the electronic properties and defect nature. The aim of this study was to correlate the incorporation of Na with optical and structural parameters of the CIGS layers as well as with the solar cell performance.