@article{1dacade267c04f3f98d3bc58d84985d1,
title = "Extrinsic and intrinsic photoresponse in monodisperse carbon nanotube thin film transistors",
abstract = "Spectroscopic, time-resolved scanning photocurrent microscopy is shown to distinguish the intrinsic photoresponse of monodisperse semiconducting (99%) single-walled carbon nanotubes (SWCNTs) from the extrinsic photoresponse of the substrate. A persistent positive photocurrent induced by near-infrared excitation is attributed to the generation of free carriers by inter-band excitation in SWCNTs. For shorter excitation wavelengths, absorption by the Si substrate generates two types of photocurrent: a transient positive photoresponse, identified as a displacement current, and a persistent negative photocurrent that arises from photogating of the SWCNT thin film.",
author = "Erik Sczygelski and Sangwan, {Vinod K.} and Wu, {Chung Chiang} and Arnold, {Heather N.} and Ken Everaerts and Marks, {Tobin J.} and Hersam, {Mark C.} and Lauhon, {Lincoln J.}",
note = "Funding Information: This research was supported by the National Science Foundation (DMR-1006391 and DMR-1121262) and by the Nanoelectronics Research Initiative at the Materials Research Center of Northwestern University. H.N.A. acknowledges support from a NASA Space Technology Research Fellowship. We thank Dr. R. Divan and Dr. L. Ocala of the Center for Nanoscale Materials, Argonne National Laboratory, Dr. N. Basit of the Micro/Nano Fabrication Facility, Northwestern University, and R. Lajos, Nanotechnology Core Facility, University of Illinois, Chicago for assistance with clean room fabrication. We also thank Dr. J. Hyun for helpful discussions.",
year = "2013",
month = feb,
day = "25",
doi = "10.1063/1.4793519",
language = "English (US)",
volume = "102",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "8",
}