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Publication details for Dr Chris OttleyDurose, K, Boyle, D, Abken, A., Ottley, C.J., Nollet P, Degrave S, Burgelman M, Wendt R, Beier J & Bonnet D (2002). Key aspects of CdTe/CdS solar cells. physica status solidi (b) 229(2): 1055-1064.
- Publication type: Journal papers: academic
- ISSN/ISBN: 0370-1972, 1521-3951
- DOI: 10.1002/1521-3951(200201)229:2<1055::AID-PSSB1055>3.0.CO;2-W
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
Recent developments in the following areas are briefly reviewed: a) the electrical structure of grain boundaries in CdTe absorbers, b) impurities and non-stoichiometry in CdTe solar cells and c) use of Sb2Te3 in contacts to CdTe. Nominally identical solar cells fabricated using 99.999% pure CdTe feedstock from two different suppliers were compared. Differences in the photovoltaic response and absorber grain size were correlated with the purity of the feedstock, the purer material giving the higher Voc, FF and efficiency, and larger grain size. Quantum efficiency and C-V measurements indicated that the performance differences are most likely to result from reduced doping at the back contact surface in the less pure sample. A quantitative SIMS study of Sb-Te contacts to CdTe reveals that annealing in air at 400 °C causes an influx of Sb and O into the absorber layer. Free energy calculations indicate that this is driven by the preferential reaction of O with Sb compared to CdTe oxidation.
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