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 by Staff Writers Sendai, Japan (SPX) Dec 15, 2021
Tin sulfide (SnS) is an abundant, safe, and environmentally friendly solar cell material. This inexpensive material is forecast to be used in next-generation solar cell panels. A research group led by Issei Suzuki and Sakiko Kawanishi, assistant professors at Tohoku University's Institute of Multidisciplinary Research for Advanced Materials, has fabricated n-type conductive SnS thin films by impurity doping for the first time. Conventional SnS thin films are usually p-type conductive. Thus, SnS thin-film solar cells have been fabricated using a pn heterojunction with p-type SnS thin film and other n-type semiconductor thin films, such as CdS. However, the conversion efficiency of such heterojunction devices has stagnated at approximately 5%, rendering their use impractical. The SnS thin-film solar cells employing a pn homojunction, which uses SnS thin films for both p-type and n-type layers, is expected to exhibit higher conversion efficiency. Yet, n-type conducive SnS thin films without toxic elements have never been achieved before. Utilizing chlorine-doping and a sulfur plasma supply, the research group reduced the lattice defects inhibiting the n-type conversion of SnS, realizing the world's first n-type SnS thin films without toxic elements. "Our realization paves the way for practical pn homojunction SnS thin-film solar cells," said Suzuki.
Research Report: "n -type electrical conduction in SnS thin films"
Solar parks could boost bumble bee numbers in a win-win for nature London, UK (SPX) Dec 15, 2021 New research shows that simple changes to how UK solar parks are managed could boost ground nesting bumble bee populations in the parks and surrounding areas, providing an additional benefit on top of renewable energy. These preliminary results will be presented at Ecology Across Borders on Monday 13 December by Hollie Blaydes, a PhD researcher at Lancaster University. Using a model that simulated bumble bee foraging in UK solar parks, researchers at Lancaster University investigated differe ... read more
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