期刊
ACS NANO
卷 9, 期 12, 页码 11618-11627出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b06160
关键词
carbon nanotubes; photodetector; thermoelectric; photothermoelectric; Joule heating
类别
资金
- U.S. Department of Energy, Office of Science, under the National Institute for Nano Engineering (NINE) at Sandia National Laboratories
- Lockheed-Martin Rice University LANCER Program
- DOE [BES DE-FG02-06ER46308]
- Robert A. Welch Foundation [C-1509]
- U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
- Grants-in-Aid for Scientific Research [26600010, 26107516, 26103513, 26286005] Funding Source: KAKEN
Carbon nanotubes (CNTs) have emerged as promising materials for visible, infrared, and terahertz photodetectors. Further development of these photodetectors requires a fundamental understanding of the mechanisms that govern their behavior as well as the establishment of figures of merit for technology applications. Recently, a number of CNT detectors have been shown to operate based on the photothermoelectric effect. Here we present a figure of merit for these detectors, which includes the properties of the material and the device. In addition, we use a suite of experimental characterization methods for the thorough analysis of the electrical, thermoelectric, electrothermal, and photothermal properties of the CNT thin-film devices. Our measurements determine the quantities that enter the figure of merit and allow us to establish a path toward future performance improvements.
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