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Study of the carrier transfer across the GaNP nanowire electrolyte interface by electron paramagnetic spin trapping
Justus Liebig University of Giessen, Germany.
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, Faculty of Science & Engineering. Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials.
Justus Liebig University of Giessen, Germany.
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, Faculty of Science & Engineering. Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials.ORCID iD: 0000-0001-7155-7103
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2017 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 110, no 22, 222101Article in journal (Refereed) Published
Abstract [en]

We investigate the transfer of photoexcited charge carriers from GaP and GaNP nanowires to an electrolyte by bias-dependent photocurrent and electron paramagnetic resonance experiments using 5,5-dimethyl-1-pyrroline-N-oxide as a spin trap. The results of the latter show that hydroxyl radicals are created over the entire applied bias range from -1000mV to +1300mV by hole transfer. In contrast, the photocurrent changes from cathodic to anodic at the open circuit potential of the three-electrode setup with the nanowire sample acting as the working electrode. The experiments show that the photoelectrochemical response of GaNP nanowires is significantly stronger compared to that of the GaP nanowires. Published by AIP Publishing.

Place, publisher, year, edition, pages
AMER INST PHYSICS , 2017. Vol. 110, no 22, 222101
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-139194DOI: 10.1063/1.4984277ISI: 000403341300019OAI: oai:DiVA.org:liu-139194DiVA: diva2:1120178
Available from: 2017-07-05 Created: 2017-07-05 Last updated: 2017-09-07

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Stehr, Jan EricBuyanova, Irina
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