| Autor: |
Deborde T; Department of Physics, Oregon State University , Corvallis, Oregon 97331, United States., Aspitarte L, Sharf T, Kevek JW, Minot ED |
| Jazyk: |
angličtina |
| Zdroj: |
ACS nano [ACS Nano] 2014 Jan 28; Vol. 8 (1), pp. 216-21. Date of Electronic Publication: 2013 Dec 23. |
| DOI: |
10.1021/nn403137a |
| Abstrakt: |
We have performed scanning photocurrent microscopy measurements of field-effect transistors (FETs) made from individual ultraclean suspended carbon nanotubes (CNTs). We investigate the spatial-dependence, polarization-dependence, and gate-dependence of photocurrent and photovoltage in this system. While previous studies of surface-bound CNT FET devices have identified the photovoltaic effect as the primary mechanism of photocurrent generation, our measurements show that photothermoelectric phenomena play a critical role in the optoelectronic properties of suspended CNT FETs. We have quantified the photothermoelectric mechanisms and identified regimes where they overwhelm the photovoltaic mechanism. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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