Figure of Merit for Carbon Nanotube Photothermoelectric Detectors

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• 作者：Kristopher J. Erikson ; Xiaowei He ; A. Alec Talin ; Bernice Mills ; Robert H. Hauge ; Takashi Iguchi ; Naoki Fujimura ; Yukio Kawano ; Junichiro Kono ; Fran莽ois L茅onard
• 刊名：ACS Nano
• 出版年：2015
• 出版时间：December 22, 2015
• 年：2015
• 卷：9
• 期：12
• 页码：11618-11627
• 全文大小：628K
• ISSN：1936-086X

文摘

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.