my.bionity.com
With an accout for my.bionity.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
Photovoltaics (PVs) benefitting from ferroelectric polarizations can overcome critical limitations of conventional type PVs. In this class, Bi2FeCrO6 is known to be the best-performing material; however, a fundamental understanding of the origin is lacking, which has limited further performance improvements. Here, we carried out a theoretical investigation of the electronic structure of this material. As a result, electron−hole ( e-h ) pairs are observed to separate upon photoexcitation, which can be a dominant underlying mechanism for the exceptional PV responses. Based on this understanding, we further suggest five novel materials that can offer a combination of strong e-h separations and visible-light absorptions. We expect the community of ferroelectric PVs to immediately benefit from the features of the new suggested materials.
| Authors: | Donghoon Kim; Hyeon Han; June Ho Lee; Jin Woo Choi; Jeffrey C. Grossman; Hyun Myung Jang; Donghun Kim | |
| Journal: | Proceedings of the National Academy of Sciences current issue | |
| Volume: | 115 | |
| edition: | 26 | |
| Year: | 2018 | |
| Pages: | 6566 | |
| DOI: | 10.1073/pnas.1721503115 | |
| Publication date: | 26-Jun-2018 |
Science and Culture: Math tools send legislators back to the drawing board [Political Sciences]
*UPDATE: On June 18, 2018, after this article went to press, the Supreme Court of the United States ruled on two high-profile cases related to partisan gerrymandering. In effect, the rulings sidestepped the issue of when partisan gerrymandering is unconstitutional. Both cases—one concerning ... more
It is not known whether the fossil content of amber accurately represents the arthropod biodiversity of past forests, and if and how those fossils can be compared with recent fauna for studies and predictions of biodiversity change through time. Our study of arthropods (mainly insects and s ... more
Primary productivity below the seafloor at deep-sea hot springs [Environmental Sciences]
The existence of a chemosynthetic subseafloor biosphere was immediately recognized when deep-sea hot springs were discovered in 1977. However, quantifying how much new carbon is fixed in this environment has remained elusive. In this study, we incubated natural subseafloor communities under ... more
© 1997-2021 LUMITOS AG, All rights reserved
