Browsing by Author "MacDonald, B"

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    Examining the role of ultra-thin atomic layer deposited metal oxide barrier layers on CdTe/ITO interface stability during the fabrication of solution processed nanocrystalline solar cells
    (Elsevier Science BV, 2014-06-01) Chambers, BA; MacDonald, B; Ionescu, M; Deslandes, A; Quiton, J; Jasieniak, JJ; Andersson, GG
    Solution processed CdTe layers are a potentially low-cost alternative for use in thin-film solar cells. We have recently reported the use of such nanocrystalline layers within ITO/CdTe/ZnO/Al device architectures. One key concern with this type of device structure is the possibility of atomic scale interdiffusion between the ITO and CdTe layers, which can result in deleterious n-type doping of the CdTe layer. Rutherford Backscattering has been used to study the chemical composition across the ITO/CdTe interface as a function of thermal annealing temperature. Through these measurements we verify that interdiffision is observed across the interface for annealing temperatures above 200 degrees C, and the extent of interdiffusion increases with temperature. Ultra-thin alumina, zirconia and titania layers deposited between the ITO and CdTe layers have been studied for their potential to act as a diffusion barrier. All investigated barriers successfully suppress interdiffusion. The outcomes of these compositional studies are directly compared to solar cells fabricated under analogous processing conditions, demonstrating improved cell performance. © 2014, Elsevier Ltd.
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    Undressing the native mounted police: paint composition of a sorcery motif in Southern Cape York Peninsula
    (Australian Archaeological Association, 2014-12-03) Huntley, J; Cole, N; Musgrave, C; Rangers, L; Dotte-Sarout, E; Stalla, D; MacDonald, B; Brand, HEA; Burke, H; Wallis, LA
    Paints have the potential to encode information in every part of their preparation and use (in European parlance ‘chaîne opératoire’). Here, we report scanning electron microscopy for both chemical and anthracological analyses, as well as synchrotron powder diffraction results characterising a composite paint used to create a grey shirt on one of several Native Mounted Police motifs at the Crocodile 1 Rockshelter on Crocodile Station, Quinkan Country. Known to senior Traditional Owners as sorcery figures, the description of the paint provides additional information regarding the selection of materials by artists whose intention was to exercise power and agency in countering the violent attacks of the Native Mounted Police during the 1870s and 1880s. © The Authors