Tommi Karhunen

University of Eastern Finland
Latest in Product Development
A solar panel from Bright Saver sits at Craig Keenan's home Friday, Aug. 1, 2025, in Baltimore.
Solar Panels That Fit On Your Balcony or Deck Are Gaining Traction In the U.S.
August 15, 2025
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The U.S. Military Wants to Blow Up Some Cybertrucks
August 11, 2025
I Stock 2166142278
Inside the Search for Sustainable Aviation Fuels, Which Are on the Federal Chopping Block
August 11, 2025
CobraJet eVTOL AI-Powered Fighter Drone and Interceptor for C-UAS Defense.
SkyDefense Unveils CobraJet Fighter Drone, Interceptor
August 11, 2025
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Cybathlon 2016 will be an Olympic-style competition to advance assistive devices will be held Zurich, Switzerland, Oct. 8.
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Assistive Robot Olympics
Virgin Galactic's first SpaceShipTwo during its third powered flight.
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Where Are We With Space Tourism?
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.
Product Development
Glass Used to Optimize Graphene
In this June 26, 2008 file photo, an Etch-A-Sketch drawing made by artist Andy Kingston depicts a rural farm scene in Poplar Bluff, Mo. Ohio Art Co. sold the Etch A Sketch and the spinoff Doodle Sketch to Spin Master Corp. for an undisclosed price to a toy firm in Toronto. Ohio Art announced the surprise move Thursday, Feb. 11, 2016. (Margaret Harwell/The Daily American Republic via AP)
Supply Chain
Etch A Sketch Maker Sells Famous Toy
More from Tommi Karhunen
Doped lithium titanate (LTO) nanoparticles could be incorporated into Li-ion batteries used in, for example, electric or hybrid automotive applications.
Product Development
NextGen Lithium Batteries Problem Solved
The new material's electrochemical performance is very promising.
February 17, 2016