Nano letters, 2009-09, Vol.9 (9), p.3349-3353
2009
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Details
- Autor(en) / Beteiligte
- Titel
- Carrier Lifetime and Mobility Enhancement in Nearly Defect-Free Core−Shell Nanowires Measured Using Time-Resolved Terahertz Spectroscopy
- Ist Teil von
- Nano letters, 2009-09, Vol.9 (9), p.3349-3353
- Ort / Verlag
- Washington, DC: American Chemical Society
- Erscheinungsjahr
- 2009
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- We have used transient terahertz photoconductivity measurements to assess the efficacy of two-temperature growth and core−shell encapsulation techniques on the electronic properties of GaAs nanowires. We demonstrate that two-temperature growth of the GaAs core leads to an almost doubling in charge-carrier mobility and a tripling of carrier lifetime. In addition, overcoating the GaAs core with a larger-bandgap material is shown to reduce the density of surface traps by 82%, thereby enhancing the charge conductivity.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1530-6984eISSN: 1530-6992DOI: 10.1021/nl9016336Titel-ID: cdi_proquest_miscellaneous_734040689
- Format
- –
- Schlagworte
- Arsenicals - chemistry, Condensed matter: electronic structure, electrical, magnetic, and optical properties, Cross-disciplinary physics: materials science, rheology, Electric Conductivity, Electron states and collective excitations in thin films, multilayers, quantum wells, mesoscopic and nanoscale systems, Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures, Electronic transport in multilayers, nanoscale materials and structures, Exact sciences and technology, Gallium - chemistry, Materials science, Materials Testing, Nanocrystalline materials, Nanoscale materials and structures: fabrication and characterization, Nanotechnology - methods, Nanowires - chemistry, Particle Size, Photochemistry, Physics, Quantum wires, Surface Properties, Temperature, Terahertz Spectroscopy - methods, Time Factors