Angus A. Rockett

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The high natural abundance of silicon, together with its excellent reliability and good efficiency in solar cells, suggest its continued use in production of solar energy, on massive scales, for the foreseeable future. Although organics, nanocrystals, nanowires and other new materials hold significant promise, many opportunities continue to exist for(More)
The present work shows results on elemental distribution analyses in Cu(In,Ga)Se2 thin films for solar cells performed by use of wavelength-dispersive and energy-dispersive X-ray spectrometry (EDX) in a scanning electron microscope, EDX in a transmission electron microscope, X-ray photoelectron, angle-dependent soft X-ray emission, secondary ion-mass(More)
COVER ARTICLE John Rogers et al Compact monocrystalline silicon solar modules with high voltage outputs and mechanically flexible designs REVIEW David King et al Biofuels and synthetic fuels in the US and China: A review of Well-to-Wheel energy use and greenhouse gas emissions with the impact of land-use change
An additional benefi t of the use of NW arrays for PVs is the inherent cost-saving potential associated with the reduced volume of the energy conversion medium, leveraged by the ability to grow high quality III-V crystals on foreign substrates. The use of foreign (non-III-V compound semiconductor) sub-strates was previously shown to enhance device(More)
A noncontact chemical and electrical measurement X-ray photoelectron spectroscopy (XPS) technique is performed to investigate a CdS-based photoresistor during its operation. The main objective of the technique is to trace chemical- and location-specified surface potential variations as shifts of the XPS Cd 3d(5/2) peak position without and under(More)
There is growing evidence that domain walls in ferroics can possess emergent properties that are absent in the bulk. For example, 180° ferroelectric domain walls in the ferroelectric-antiferromagnetic BiFeO3 are particularly interesting because they have been predicted to possess a range of intriguing behaviors, including electronic conduction and enhanced(More)
We describe a theoretical analysis of the structures of self-organizing nanoparticles formed by Pt and Ru-Pt on carbon support. The calculations provide insights into the nature of these metal particle systems-ones of current interest for use as the electrocatalytic materials of direct oxidation fuel cells-and clarify complex behaviors noted in earlier(More)
Temperature dependent mobility, resistivity, and carrier concentration measurements were made on epitaxial single crystal thin films of group III-rich CuIn 1Ϫx Ga x Se 2 ͑CIGS͒. The films were produced using a hybrid sputtering and evaporation process on GaAs substrates. Samples with average Ga/͑InϩGa͒ values between 0.03 and 1.0 and Cu/͑InϩGa͒ between 0.73(More)
The steady-state photoelectrochemical responses of p-GaP photoelectrodes immersed in aqueous electrolytes and sensitized separately by six triphenylmethane dyes (rose bengal, rhodamine B, crystal violet, ethyl violet, fast green fcf, and brilliant green) have been analyzed. Impedance measurements indicated that these p-GaP(100) photoelectrodes operated(More)