Fabrication of high sensitive and fast response MIR photodetector based on a new hybrid graphene structure

Siahsar, Mehrdad; Jabbarzadeh, Farnaz; Dolatyari, Mahboubeh; Rostami, G.; Rostami, Ali

doi:10.1016/j.sna.2015.12.014

Cited by 5 publications

(30 citation statements)

References 40 publications

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“…Graphite oxide (GO) was synthesized by natural graphite by Hummers' method [43]. A colloidal suspension of synthesized graphene oxide in purified water was prepared by sonication of GO in water (3 mg/mL) for 3 h. Hydrazine monohydrate (1 mL for 3 mg of GO, 98%, Aldrich) was subsequently added to the suspension, in order to remove oxygen components by the hydrazine reduction [38][39][40]. Additional stirring in an oil bath held at 80°C for 12 h yielded a black precipitation of reduced graphene oxide powder.…”

Section: Synthesis and Modificationmentioning

confidence: 99%

“…All of the obtained suspensions were stirred for 24 h at room temperature. After purification, the obtained materials were individually added to 30 mL deionized water and dispersed until a thin sheet was formed on top of the colloidal suspension [38][39][40].…”

Section: Synthesis and Modificationmentioning

confidence: 99%

“…The morphology of products was studied via a Tescan model MIRA3 field-emission scanning electron microscope with an accelerating voltage of 10 kV. TEM images were obtained on a Zeiss-EM10C-80KV transmission electron microscope with an accelerating voltage of 80 kV [38][39][40].…”

Section: Characterizationmentioning

confidence: 99%

“…The number of plane waves included in the basis was determined by cut-off energy (Ec) of 300.0 eV. The summation over the Brillouin zone was operated with a k-point sampling using a Monkhorst-Pack grid with parameters of 3 × 3 × 1 [40].…”

Section: Computational Detailsmentioning

confidence: 99%

“…To modify surface of graphene sheet, we introduce trap states and a band gap in graphene by means of organic ligands, which interact with graphene for fabricating sensitive infrared detector operated at 3-5 μm [38][39][40]. To achieve this, our focus is oriented to the analysis of altered structural arrangement of the organic ligands/graphene with strong interaction between them.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Surface-Modified Graphene for Mid-Infrared Detection

Siahsar¹,

Dolatyari²,

Rostami³

et al. 2017

Graphene Materials - Advanced Applications

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In this chapter, morphology variation and electronic structure in a surface-modified graphene are demonstrated by both calculation and experimental results. The results indicate that the band structure and morphology of modified graphene sheets are altered because of changing in the type of hybridization of carbon atoms in the graphene sheet. Accordingly, the band gap of graphene can be tuned by surface modification using organic molecules. Then, modified graphene is used for fabrication of infrared detectors. The properties of unmodified graphene photodetectors were also measured so as to compare with modified graphene photodetectors. The results demonstrate that modification of graphene using organic ligands improved the detection parameters such as fast response time, electrical stability and low dark current. Moreover, the sensitivity of photodetectors based on modified graphene was significantly improved.

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Section: Synthesis and Modificationmentioning

confidence: 99%

Section: Synthesis and Modificationmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Section: Computational Detailsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Surface-Modified Graphene for Mid-Infrared Detection

Siahsar¹,

Dolatyari²,

Rostami³

et al. 2017

Graphene Materials - Advanced Applications

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Multi-band enhanced graphene photodetector based on localized surface plasmon

Suo

Yang

et al. 2021

Sensors and Actuators A: Physical

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High-speed and high-precision PbSe/PbI2 solution process mid-infrared camera

Dortaj

Dolatyari

Zarghami

et al. 2021

Sci Rep

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Infrared (IR) cameras based on semiconductors grown by epitaxial methods face two main challenges, which are cost and operating at room temperature. The alternative new technologies which can tackle these two difficulties develop new and facile material and methods. Moreover, the implementation of high speed camera, which makes high resolution images with normal methods, is very expensive. In this paper, a new nanostructure based on a cost-effective solution processed technology for the implementation of the high-speed mid-infrared light camera at room temperature is proposed. To this end, the chemically synthesized PbSe–PbI2 core–shell Quantum Dots (QDs) are used. In this work, a camera including 10 × 10 pixels is fabricated and synthesized QDs spin-coated on interdigitated contact (IDC) and then the fabricated system passivated by epoxy resin. Finally, using an electronic reading circuit, all pixels are converted to an image on the monitor. To model the fabricated camera, we solved Schrodinger–Poisson equations self consistently. Then output current from each pixel is modeled based on semiconductor physics and dark and photocurrent, as well as Responsivity and Detectivity, are calculated. Then the fabricated device is examined, and dark and photocurrents are measured and compared to the theoretical results. The obtained results indicate that the obtained theoretical and measured experimental results are in good agreement together. The fabricated detector is high speed with a rise time of 100 ns. With this speed, we can get 10 million frames per second; this means we can get very high-resolution images. The speed of operation is examined experimentally using a chopper that modulates input light with 50, 100, 250, and 500 Hz. It is shown that the fabricated device operates well in these situations, and it is not limited by the speed of detector. Finally, for the demonstration of the proposed device operation, some pictures and movies taken by the camera are attached and inserted in the paper.

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Fabrication of high sensitive and fast response MIR photodetector based on a new hybrid graphene structure

Cited by 5 publications

References 40 publications

Surface-Modified Graphene for Mid-Infrared Detection

Surface-Modified Graphene for Mid-Infrared Detection

Multi-band enhanced graphene photodetector based on localized surface plasmon

High-speed and high-precision PbSe/PbI2 solution process mid-infrared camera

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