Tommi Karhunen

University of Eastern Finland
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Beyond the Dashboard
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Beyond the Dashboard
October 1, 2026
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On the left is a schematic of a graphene field-effect-transistor used in this study. The device consists of a solar cell containing graphene stacked on top of a high-performance copper indium gallium diselenide (CIGS) semiconductor, which in turn is stacked on an industrial substrate (either soda-lime glass, SLG, or sodium-free borosilicate glass, BSG). The research revealed that the SLG substrate serves as a source of sodium doping, and improved device performance in a way not seen in the sodium-free substrate. On the right is a scanning electron micrograph of the device as seen from above, with the white scale bar measuring 10 microns, and a transmission electron micrograph inset of the CIGS/graphene interface where the white scale bar measures 100 nanometers.
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Glass Used to Optimize Graphene
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Modeling AI ROI Like a CFO, Not a Vendor
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A six-step framework for building AI business cases that survive audit scrutiny, board review, and hindsight.
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