Category Archives: Formats

Blue skies open for solar innovation

The solar power industry has enjoyed an innovation boom over the last decade or so, with accelerating production capacity and matching price drops. Last year, the industry added some 133 gigawatts (GW) of capacity worldwide, which is almost 19 percent of the previously installed 710 GW of capacity. One GW of power equals the output of 3.125 million solar photovoltaic (PV) panels, according to the US Department of Energy.

Such leaps in global capacity reflect the fact that commercial solar panels are approaching 20 percent efficiency which is near the theoretical limits. What is more, manufacturers are consolidating production methods and creating standards that make it easier to share suppliers.

With such progress alight, it might seem like a time for blue-sky nanomaterials researchers to entrust their promising discoveries to tech transfer professionals and move on to the next theoretical challenge. But physicist Sajeev John of the University of Toronto, one of many materials scientists with a promising new solar cell trick up his sleeve, says, “I wouldn’t say I’m knocking on the door of existing industry. I want to keep the IP [intellectual property] and develop it, rather than just license it to existing solar cell companies.”

John and other researchers are betting that the nanomaterials they are developing, including reimagined silicon photonic crystals and organic photovoltaic materials, are different enough, and valuable enough, to merit new industrial production infrastructure.

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As China’s Quantum-Encrypting Satellites Shrink, Their Networking Abilities Grow

The orbiting Tiangong-2 space lab has transmitted quantum-encryption keys to four ground stations, researchers reported on 18 August. The same network of ground stations is also able to receive quantum keys from the orbiting Micius satellite, which is in a much higher orbit, using the space station as a repeater. It comes just after the late July launch of Jinan 1, China’s second quantum-encrypting satellite, by the University of Science and Technology of China. USTC told the Xinhua News Agency that the new satellite is one-sixth the mass of its 2016 predecessor.

“The launch is significant,” says physicist Paul Kwiat of the University of Illinois in Urbana-Champaign, because it means the team are starting to build, not just plan, a quantum network. USTC researchers did not reply to IEEE Spectrum’s request for comments.

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Space 5G Is On the Launchpad

The next generation of cellphone networks won’t just be 5G or 6G—they will be zero g. In April, Lynk Global launched the first direct-to-mobile commercial satellite, and on 15 August a competitor, AST SpaceMobile, confirmed plans to launch an experimental direct-to-mobile satellite of its own in mid-September. Inmarsat and other companies are working on their own low Earth orbit (LEO) cellular solutions as launch prices drop, satellite fabrication methods improve, and telecoms engineers push new network capabilities.

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