Single-layer graphene-TiO2 nanotubes array heterojunction for ultraviolet photodetector application

Zhang, Deng-Yue; Ge, Cai-Wang; Wang, Jiu-Zhen; Zhang, Tengfei; Wu, Yucheng; Liang, Feng‐Xia

doi:10.1016/j.apsusc.2016.07.041

Cited by 58 publications

(10 citation statements)

References 41 publications

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“…Another important parameter of photodetector is the specific detectivity (D*), which determines the capability of a photodetector to detect a weak light signal, can be given A is the effective photoactive area of detector, e is the electron charge, and I dark is the dark current. Using the photoresponsivity of 60.3 A/W, a D* = 1.24 × 10 11 jones (1 jones = 1 cm Hz 1/2 W −1 ) is obtained, which is comparable to the best performances of reported graphene-based UV photodetectors [39,54]. Importantly, the photoresponsivity and detectivity can be further enhanced at lower incident laser powers [27,29,53].…”

Section: Resultssupporting

confidence: 53%

Solar-blind ultraviolet detection based on TiO₂ nanoparticles decorated graphene field-effect transistors

Deng

Zhang

et al. 2019

Nanophotonics

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Sensitive solar-blind ultraviolet (UV) photodetectors are important to various military and civilian applications, such as flame sensors, missile interception, biological analysis, and UV radiation monitoring below the ozone hole. In this paper, a solar-blind UV photodetector based on a buried-gate graphene field-effect transistor (GFET) decorated with titanium dioxide (TiO2) nanoparticles (NPs) was demonstrated. Under the illumination of a 325-nm laser (spot size ~2 μm) with a total power of 0.35 μW, a photoresponsivity as high as 118.3 A/W was obtained, at the conditions of zero gate bias and a source-drain bias voltage of 0.2 V. This photoresponsivity is over 600 times higher than that of a recently reported solar-blind UV photodetector based on graphene/vertical Ga2O3 nanowire array heterojunction (0.185 A/W). Experiments showed that the photoresponsivity of the TiO2 NPs decorated GFET photodetectors can be further enhanced by increasing the source-drain bias voltage or properly tuning the gate bias voltage. Furthermore, the photoresponse time of the TiO2 NPs decorated GFET photodetectors can also be tuned by the source-drain bias and gate bias. This study paves a simple and feasible way to fabricate highly sensitive, cost-efficient, and integrable solar-blind UV photodetectors.

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Section: Resultssupporting

confidence: 53%

Solar-blind ultraviolet detection based on TiO₂ nanoparticles decorated graphene field-effect transistors

Deng

Zhang

et al. 2019

Nanophotonics

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“…It is known from the literature that polymers modified with carbon structures can exhibit a number of interesting properties. The use of nanotubes, graphene, and fullerenes enables the production of materials with conductive, biochemical, adsorptive, and other qualities [23][24][25][26][27].…”

Section: This Investigation Brought Important Conclusion About the Imentioning

confidence: 99%

Structure–Property of Wet-Spun Alginate-Based Precursor Fibers Modified with Nanocarbons

Szparaga

Brzezińska

Pabjańczyk-Wlazło

et al. 2020

Autex Research Journal

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The results of studies assessing the influence of the addition of carbon nanofillers, such as multiwalled carbon nanotubes (MWCNTs) and graphene oxide (GO) that differ in size and structure, on the molecular and supramolecular structure and properties of alginate fibers that might be prospective precursors for carbon fiber (PCF) industry are presented in this article. The investigation was carried out by Fourier transform infrared (FTIR) spectroscopy, wide-angle X-ray diffraction (WAXD), and tension testing. In the frame of the current study, two types of alginate fibers were examined and compared: alginic acid and calcium alginate fibers. Alginic acid fibers were formed by chemical treatment of calcium alginate fibers with hydrochloric acid due to the fact that Ca2+ ions presented in the fibers were expected to adversely affect the prospective carbonization process. This investigation brought important conclusions about the influence of nanofillers on the physical properties of the final material. Understanding the link between the incorporation of carbon nanostructures and a possible influence on the formation of ordered carbon structures in the precursor fibers brings an important opportunity to get insights into the application of alginate fibers as a prospective base material for obtaining cost-efficient carbon fibers.

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“…In the planar photodetector device design, a common compromise that is often made is to reduce absorption volume to suppress the dark current while sacrificing some responsivity. Leveraging the development of nanotechnology, many nanostructures, such as nanowires (NWs) [9][10][11], nanotubes [12][13][14], nanopillars [15][16][17], nanorods [18][19][20], and two-dimensional (2D) materials [21][22][23], have emerged in the pursuit of high-performance room-temperature photodetectors, as their nanoscale size offers extremely small active volume (for reduced dark current) and at the same time, distinct light absorption properties for large responsivity, as well as shorter response time and larger bandwidth [24].…”

Section: Introductionmentioning

confidence: 99%

Review on III-V Semiconductor Single Nanowire-Based Room Temperature Infrared Photodetectors

Allen

et al. 2020

Materials

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Recently, III-V semiconductor nanowires have been widely explored as promising candidates for high-performance photodetectors due to their one-dimensional morphology, direct and tunable bandgap, as well as unique optical and electrical properties. Here, the recent development of III-V semiconductor-based single nanowire photodetectors for infrared photodetection is reviewed and compared, including material synthesis, representative types (under different operation principles and novel concepts), and device performance, as well as their challenges and future perspectives.

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Single-layer graphene-TiO2 nanotubes array heterojunction for ultraviolet photodetector application

Cited by 58 publications

References 41 publications

Solar-blind ultraviolet detection based on TiO₂ nanoparticles decorated graphene field-effect transistors

Solar-blind ultraviolet detection based on TiO₂ nanoparticles decorated graphene field-effect transistors

Structure–Property of Wet-Spun Alginate-Based Precursor Fibers Modified with Nanocarbons

Review on III-V Semiconductor Single Nanowire-Based Room Temperature Infrared Photodetectors

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Single-layer graphene-TiO2 nanotubes array heterojunction for ultraviolet photodetector application

Cited by 58 publications

References 41 publications

Solar-blind ultraviolet detection based on TiO2 nanoparticles decorated graphene field-effect transistors

Solar-blind ultraviolet detection based on TiO2 nanoparticles decorated graphene field-effect transistors

Structure–Property of Wet-Spun Alginate-Based Precursor Fibers Modified with Nanocarbons

Review on III-V Semiconductor Single Nanowire-Based Room Temperature Infrared Photodetectors

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Solar-blind ultraviolet detection based on TiO₂ nanoparticles decorated graphene field-effect transistors

Solar-blind ultraviolet detection based on TiO₂ nanoparticles decorated graphene field-effect transistors