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Fizika i Tekhnika Poluprovodnikov, 2020, Volume 54, Issue 12, Page 1385
(Mi phts6684)
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This article is cited in 1 scientific paper (total in 1 paper)
NANOSTRUCTURES : PHYSICS AND TECHNOLOGY 28th International Symposium (Minsk, Republic of Belarus, September, 2020)
Graphene
On the origin of photocurrents in pristine graphene
Yu. B. Vasilyev Ioffe Institute, 194021 St. Petersburg, Russia
Abstract:
Recently Ma et al. (Nature Nanotech., 14, 145, 2019) reported an intrinsic photocurrent in graphene, which occurs as the authors believe “in a different parameter regime from all the previously observed photothermoelectric or photovoltaic photocurrents in graphene”. Here we present an alternative – obvious and transparent explanation of such experiments. We demonstrate that the photo effect occurs in the $p$–$n$ junctions formed in graphene samples containing two regions of different widths with different particle concentrations. This difference in concentration for various sample widths is found to result from edge doping of samples.
Keywords:
graphene, photocurrents, $p$–$n$ junctions.
Citation:
Yu. B. Vasilyev, “On the origin of photocurrents in pristine graphene”, Fizika i Tekhnika Poluprovodnikov, 54:12 (2020), 1385; Semiconductors, 54:12 (2020), 1664–1665
Linking options:
https://www.mathnet.ru/eng/phts6684 https://www.mathnet.ru/eng/phts/v54/i12/p1385
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Abstract page: | 50 | Full-text PDF : | 8 |
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