Index Catalog // ScholarsArchive@OSU

Creator:: Aspitarte, Lee, McCulley, Daniel R., and Minot, Ethan D.
Abstract:: We study photocurrent generation in individual suspended carbon nanotube pn junctions using spectrally-resolved scanning photocurrent microscopy. Spatial maps of the photocurrent allow us to determine the length of the pn junction intrinsic region, as well as the role of the n-type Schottky barrier. We show that reverse-bias operation eliminates complications...
Resource Type:: Article
Full Text:: ) Gabor, N. M.; Zhong, Z.; Bosnick, K.; Park, J.; McEuen, P. L. Science (80-. ). 2009, 325 (5946

Creator:: McCulley, Daniel R.
Abstract:: In nanoscale materials, the Coulombic interaction between electrons are stronger than in bulk materials. These stronger interactions, caused by confinement and reduced dielectric screening, have interesting consequences for light-matter interactions. In carbon nanotubes (CNTs), strong interactions can enhance the impact ionization process, and thus assist photocurrent generation in CNTs. Conversely,...
Resource Type:: Dissertation
Full Text:: S22 resonance on eight different CNTs over a range of electric fields up to ~10 V/μm. The spectra

Creator:: Aspitarte, Lee, McCulley, Daniel R., and Minot, Ethan D.
Abstract:: PN junctions in nanoscale materials are of interest for a range of technologies including photodetectors, solar cells, and light-emitting diodes. However, Schottky barriers at the interface between metal contacts and the nanomaterial are often unavoidable. The effect of metal-semiconductor interfaces on the behavior of nanoscale diodes must be understood, both...
Resource Type:: Article
Full Text:: chiral index of this CNT is (n, m) = (29, 10) which has a lowest-energy exciton resonance S11 = 430 meV

Creator:: McCulley, Daniel R., Senger, Mitchell J., Bertoni, Andrea, and Perebeinos., Vasili
Abstract:: Carbon nanotube (CNT) photodiodes have potential to convert light into electrical current with high efficiency. However, previous experiments have revealed photocurrent quantum yield (PCQY) well below 100%. In this work, we show that axial electric field increases the PCQY of CNT photodiodes. In optimal conditions our data suggest PCQY >...
Resource Type:: Article
Full Text:: Sensitized Photovoltaic System. Science 2010, 330, 63–66. (9) Gabor, N. M. Impact Excitation and Electron

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