Modification of graphene oxide for applying as mid-infrared photodetector

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

doi:10.1007/s00340-015-6176-z

Cited by 18 publications

(22 citation statements)

References 43 publications

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“…A schematic of fabricated photodetector is represented in Figure 1. Table 1, the measured sensitivity, which is calculated by (R d -R i )/R i where R d and R i are electrical resistance under dark and infrared light illumination condition, for graphenebased photodetector is 0.5 [38]. Whereas, the sensitivity of photodetectors based on graphene fabricated by Hwang and co-workers, in the highest applied voltage (0.1 V), is 0.5, which is in good agreement with the sensitivity of our fabricated unmodified graphene-based detector [17,40].…”

Section: Sensitivitymentioning

confidence: 99%

“…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%

“…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%

“…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%

“…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: Sensitivitymentioning

confidence: 99%

Section: Synthesis and Modificationmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Section: Synthesis and Modificationmentioning

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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Liquid‐Exfoliated 2D Materials for Optoelectronic Applications

Alzakia

Tan

2021

Advanced Science

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Two‐dimensional (2D) materials have attracted tremendous research attention in recent days due to their extraordinary and unique properties upon exfoliation from the bulk form, which are useful for many applications such as electronics, optoelectronics, catalysis, etc. Liquid exfoliation method of 2D materials offers a facile and low‐cost route to produce large quantities of mono‐ and few‐layer 2D nanosheets in a commercially viable way. Optoelectronic devices such as photodetectors fabricated from percolating networks of liquid‐exfoliated 2D materials offer advantages compared to conventional devices, including low cost, less complicated process, and higher flexibility, making them more suitable for the next generation wearable devices. This review summarizes the recent progress on metal–semiconductor–metal (MSM) photodetectors fabricated from percolating network of 2D nanosheets obtained from liquid exfoliation methods. In addition, hybrids and mixtures with other photosensitive materials, such as quantum dots, nanowires, nanorods, etc. are also discussed. First, the various methods of liquid exfoliation of 2D materials, size selection methods, and photodetection mechanisms that are responsible for light detection in networks of 2D nanosheets are briefly reviewed. At the end, some potential strategies to further improve the performance the devices are proposed.

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Mid‐Infrared Photonics Using 2D Materials: Status and Challenges

Fang

Wang

et al. 2019

Laser & Photonics Reviews

126

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In recent years, a variety of 2‐dimensional (2D) materials including graphene, topological insulators, transition metal dichalcogenides, and black phosphorus have been utilized in photonics and optoelectronics applications. Since the mid‐infrared (MIR) region has a significant role in various fields, rapid progress has been made on photonics and optoelectronics applications using 2D materials. Herein, the progress in the photonics devices that exploit the unique properties of 2D materials for a range of MIR applications is summarized, focusing on ultrafast light generation, MIR light modulation, and photodetection. By taking advantage of ultrafast light response, broadband absorption, and high carrier mobility of 2D materials, femtosecond lasers, broadband optical modulators, and high‐responsivity photodetectors are achieved. Some perspectives on 2D material‐based MIR photonics are highlighted. Due to their MIR bandgaps, small size, high carrier mobility, and easy integration, 2D materials are appealing for MIR photonics applications. Moreover, the availability of an increasingly broad library of 2D materials with variable electronic and optical properties, and the ability to be thinned and restacked into functional and complex assembled structures, enable the development of a highly integrated MIR photonic chip, which will make information technology greener, faster, and lower in energy consumption.

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Modification of graphene oxide for applying as mid-infrared photodetector

Cited by 18 publications

References 43 publications

Surface-Modified Graphene for Mid-Infrared Detection

Surface-Modified Graphene for Mid-Infrared Detection

Liquid‐Exfoliated 2D Materials for Optoelectronic Applications

Mid‐Infrared Photonics Using 2D Materials: Status and Challenges

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