Zhang, Mingyu Ban, Dayan Xu, Chao Yeow, John T. W. Large-Area and Broadband Thermoelectric Infrared Detection in a Carbon Nanotube Black-Body Absorber Room-temperature mid- and far-infrared photodetectors and energy harvesters meet diverse upcoming demands including health condition monitoring, industrial inspection, and miniaturized power-source for Internet of Things. However, the cryogenic cooling requirement for III–V semiconductors and the inefficient light absorption in two-dimensional (2D) materials, for example, graphene (2.3%) and black phosphorus (∼3%), have hindered mid- and far-infrared optoelectronics from widespread applications. Here, we demonstrate a self-powered infrared photodetector as well as energy harvester <i>via</i> employing vertical photothermoelectric (PTE) effect of a carbon nanotube forest (CNTF). In the self-assembled anti-reflecting CNTF, 99.4% reflection suppression is observed, resulting in a broadband detectivity of 1.9 × 10<sup>7</sup> cm Hz<sup>1/2</sup> in 2.5–25 μm spectral range and peak detectivity of 2.3 × 10<sup>9</sup> cm Hz<sup>1/2</sup> at 4.3 THz <i>via</i> nonlithography fabrication. By virtue of vertical architecture, this photodetector exhibits enhanced sensitivity to weak and unfocused infrared illumination, which mitigates the high actuating power density in conventional PTE or field-effect detectors and renders practical infrared detection in the real life. photodetector exhibits;cm;cryogenic cooling requirement;4.3 THz;peak detectivity;nonlithography fabrication;light absorption;PTE;health condition monitoring;energy harvester;Carbon Nanotube Black-Body Absorber Room-temperature;far-infrared optoelectronics;broadband detectivity;carbon nanotube forest;III;field-effect detectors;self-assembled anti-reflecting CNTF;actuating power density;far-infrared photodetectors;Broadband Thermoelectric;energy harvesters 2019-11-14
    https://acs.figshare.com/articles/journal_contribution/Large-Area_and_Broadband_Thermoelectric_Infrared_Detection_in_a_Carbon_Nanotube_Black-Body_Absorber/10308242
10.1021/acsnano.9b06332.s001