Single ZnO Nanobelt Based Field Effect Transistors (FETs)

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Abstract:

Electrical properties of single ZnO nanobelt have been examined by fabricating single nanobelt based field effect transistors (FETs). The ZnO nanobelts were grown via non-catalytic simple thermal evaporation process by using metallic zinc powder in the presence of oxygen. The detailed structural and optical characterizations confirmed that the grown nanobelts are well-crystalline with the wurtzite hexagonal phase and exhibiting good optical properties. The passivation effect on the electrical characteristics of the as-grown nanobelts was also evaluated by passivating the fabricated FETs with polymethyl methacrylate (PMMA). The passivated single ZnO nanobelt based FETs exhibited higher electrical performance as compared to non-passivated FETs due to reduction in the physically absorbed chemisorbed species such as O, O−2, O2, or OH etc. The field effect mobility (eff) of the fabricated nanobelt based non-passivated and passivated FETs was estimated to be ∼21.3 and 59 cm2/V·s, respectively. Moreover the carrier concentration and peak transconductance of the fabricated non-passivated and passivated FET were calculated to be ∼8.73 × 1017 and ∼1.86 × 1018 cm−3 and ∼0.76 and 1.4 S, respectively. This work offers substantial opportunities for further practical electronics and photonics nanodevice applications of ZnO based nanostructures.

Keywords: FIELD EFFECT TRANSISTORS (FETS); PHOTOLUMINESCENCE; RAMAN-SCATTERING; ZNO NANOBELTS

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2009.1247

Publication date: October 1, 2009

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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