Isakov, I;
Sourribes, MJL;
Warburton, PA;
(2017)
Current-mode deep level transient spectroscopy of a semiconductor nanowire field-effect transistor.
Journal of Applied Physics
, 122
(9)
, Article 094305. 10.1063/1.5000370.
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Abstract
One of the main limiting factors in the carrier mobility in semiconductor nanowires is the presence of deep trap levels. While deep-level transient spectroscopy (DLTS) has proved to be a powerful tool in analysing traps in bulk semiconductors, this technique is ineffective for the characterisation of nanowires due to their very small capacitance. Here, we introduce a new technique for measuring the spectrum of deep traps in nanowires. In current-mode DLTS (“I-DLTS”), the temperature-dependence of the transient current through a nanowire field-effect transistor in response to an applied gate voltage pulse is measured. We demonstrate the applicability of I-DLTS to determine the activation energy and capture cross-sections of several deep defect states in zinc oxide nanowires. In addition to characterising deep defect states, we show that I-DLTS can be used to measure the surface barrier height in semiconductor nanowires.
Type: | Article |
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Title: | Current-mode deep level transient spectroscopy of a semiconductor nanowire field-effect transistor |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1063/1.5000370 |
Publisher version: | http://doi.org/10.1063/1.5000370 |
Language: | English |
Additional information: | Published by AIP Publishing. This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
Keywords: | Science & Technology, Physical Sciences, Physics, Applied, Physics, DOPED SILICON NANOWIRES, MOLECULAR-BEAM EPITAXY, OXIDE NANOWIRES, ZNO, DENSITY |
UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
URI: | https://discovery.ucl.ac.uk/id/eprint/1573353 |
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