The wavelength dependent photovoltaic effects caused by two different mechanisms in carbon nanotube film/CuO nanowire array heterodimensional contacts

Journal Article · Mon Jun 18 04:00:00 EDT 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4730433· OSTI ID:22080392

Jia, Xu; Jinliang, Xu ^[1]; Jialin, Sun ^[2]; Jinquan, Wei ^[3]

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1. Beijing Key Laboratory of Low-grade Energy Multiphase Flow and Heat Transfer, School of Renewable Energy, North China Electric Power University, Beijing 102206 (China)
2. Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084 (China)
3. Department of Mechanical Engineering, Key Laboratory for Advanced Materials Processing Technology of Education Ministry, Tsinghua University, Beijing 100084 (China)

Hetrodimensional contacts were fabricated by coating double-walled carbon nanotube (CNT) films on CuO nanowire arrays. Wavelength dependent photovoltaic effects by irradiating the devices with 405, 532, and 1064 nm lasers were observed. Two possible mechanisms responsible for the observed results were discussed. Photoexcitations within CuO nanowires and Schottky barriers in the heterojunctions dominate the photovoltaics in the 405 and 532 nm cases. For the 1064 nm case, the photovoltaic is the result of the excitation within the CNTs and of the heterodimensionality effect. Control experiments on CNT film/CuO granular film hetrodimensional contacts further show the relationship between these two mechanisms.

• OSTI ID: 22080392
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 25 Vol. 100; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
CARBON NANOTUBES
COATINGS
COPPER OXIDES
HETEROJUNCTIONS
LASER RADIATION
PHOTOVOLTAIC EFFECT
QUANTUM WIRES
SEMICONDUCTOR MATERIALS
THIN FILMS
WAVELENGTHS