Double-layer heterostructure of graphene/carbon nanotube films for highly efficient broadband photodetector

Abstract

Graphene-semiconducting single-wall carbon nanotubes' (graphene-s-SWCNTs) thin-film photodetector based on a double-layer stacked heterostructure was fabricated. The carbon-based heterostructure exhibits excellent long-range van der Waals interactions. The as-fabricated device was demonstrated with an ultra-broadband photodetection characteristic with a high responsivity of 78 A/W at a visible wavelength and a fast response time of 80 μs. Moreover, the high photoconductive gain based on the photogating effect for the graphene-s-SWCNTs device was realized. In addition, the temperature-dependent photoresponse performance was also demonstrated. Benefiting from the high photoconductive gain, ultra-fast response time, and high stable quality of carbon materials, our devices exhibit great potential applications for high sensitivity detection to weak target signals in extreme environments.

Low-Temperature Induced Enhancement of Photoelectric Performance in Semiconducting Nanomaterials

“…As a special example in phototransistor devices, photogating phototransistors stem from the photogating effect, which modulates devices’ conductance by phonon-induced traps. Several graphene-based structures [ 48 , 80 ] have been explored as cooling enhanced their photogating performance. Here, we focus on photoelectric devices with application in solar cells and photodetectors, especially infrared (IR) detectors consisting of near-infrared (NIR, 0.7–1 μm), short-wavelength infrared (SWIR, 1–3 μm), mid-wavelength infrared (MWIR, 3–5 μm) and long-wavelength infrared (LWIR, 8–14 μm) photodetectors.…”

“…( a 1 ) Tellurium nanoflakes (adapted from [ 47 ], with permission from the American Chemical Society, 2018). ( a 2 ) Graphene (adapted from [ 48 ], with permission from the American Institute of Physics, 2018). ( b ) Transition metal dichalcogenide (adapted from [ 49 ], with permission from the American Institute of Physics, 2019).…”

Excellent-Performance C60/Graphene/SWCNT Heterojunction with Light-Controlled Enhancement of Photocurrent

“…In addition, in the junction formed by graphene and SWCNT, efficient charge transfer has been identified. 17,18 At the junction of these two forms of carbon allotropes, both with sp2-carbons, the electrostatic coupling force can be largely enhanced under UV−NIR illumination. By optimizing the physicochemical structure of the interfacial properties, phototransistors with the high R i and fast response characteristics are realized.…”

“…Combining different dimensional materials together to form novel nanostructures is a prospective way to achieve the nanodevices operating with novel principles. − Based on this approach, combining graphene with other carbon allotropes had aroused widespread interest in forming novel hybrid nanostructures to realize excellent chemical and physical properties. , Recently, a planar SWCNT/graphene heterojunction is fabricated to obtain high R i and fast response. In addition, in the junction formed by graphene and SWCNT, efficient charge transfer has been identified. , At the junction of these two forms of carbon allotropes, both with sp2-carbons, the electrostatic coupling force can be largely enhanced under UV–NIR illumination. By optimizing the physicochemical structure of the interfacial properties, phototransistors with the high R i and fast response characteristics are realized .…”

Thin Graphene–Nanotube Films for Electronic and Photovoltaic Devices: DFTB Modeling

“…In addition, a broadband Schottky photodiode array with improved photoresponse has been developed based on the graphene/semiconducting SWCNT film [ 24 ]. A graphene-semiconducting SWCNTs thin-film photodetector based on a double-layer stacked heterostructure was fabricated by Cao et al [ 25 ]. This device demonstrates the possibility of photodetection with a high sensitivity of 78 A/W in the visible region of the spectrum.…”