Reduced graphene oxide mid-infrared photodetector at 300 K

Fernandes, Gustavo E.; Kim, Jin Ho; Oller, Declan; Xu, Jimmy

doi:10.1063/1.4931461

Cited by 16 publications

(16 citation statements)

References 35 publications

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“…The Tzolov work reported an EQE response in the mid‐IR (2–20 µm) and suggested that this may be due to a contribution to the photocurrent from the tubular carbon material in their study. However, it seems more likely that this was due to the free carrier response of the silicon as also observed in a recent work from the same research group using reduced graphene oxide/ p ‐Si photodetectors . Likewise, the Ong work observed a shoulder on the IR side of the photocurrent spectrum which was suggested to be due to the nanotubes, but could also be due to a contribution from the silicon rear junction .…”

Section: Introductionmentioning

confidence: 53%

Advances in Carbon Nanotube–Silicon Heterojunction Solar Cells

Tune

Flavel

2018

Advanced Energy Materials

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in this field as represented in Figure 2 and is broadly divided into two halves. The first half presents some essential background information on carbon nanotubes, particularly in relevance to their role in these kinds of solar cells, as well as a consideration of aspects such as thin film properties, device stability, scale-up, and operating mechanism, while the second half deals with the factors involved in improving performance.This review has been constrained almost exclusively to covering developments in the field of carbon nanotubes interfaced with monocrystalline silicon, though the field is also informed by other work being done in the associated areas of graphene-silicon and conducting polymer-silicon solar cells, as well as the use of nanotube films interfaced with polycrystalline silicon and other semiconductors, perovskites, organic photovoltaics, and more. This is partly in the interests of being able to provide a useful and informative level of technical detail while keeping the work to a manageable and digestible size both for those already working in the field and those new to it. It is also because although there are many parallels between, for example, the nanotube-silicon and polymer-silicon or graphene-silicon works, there are several important and fundamental differences, not the least of which may be the potential complexity/diversity of the operating mechanism(s) in the nanotube-silicon case. For information on these and other related types of photovoltaic device architectures incorporating carbon nanotubes, we refer the reader to Zielke et al., [49] Wang et al., [50] and Arnold et al., [51] as well as Li et al. [52] which also includes an overview of the carbon nanotube-silicon architecture as a part of the broader carbon-silicon theme. Table S1 of the Supporting Information provides a detailed and comprehensive list of published works in the carbon nanotube-silicon field along with various performance measurements, device structure parameters, and material properties. BackgroundAlthough once an exotic, poorly understood, and difficult to obtain material, carbon nanotubes are now relatively well known, well understood, and widely available from commercial suppliers. Briefly, single-walled carbon nanotubes (SWCNT) are very high aspect ratio cylinders of graphene in which the Heterojunctions of carbon nanotubes interfaced with silicon respond to light illumination and can be operated in the power regime as solar cells. Very significant advances have been made in the last 5 years both in terms of headline performance values and in fundamental understanding of the underlying operating principles, as well as the sophistication of the devices and studies being reported. The body of literature is growing rapidly, and the latest power conversion efficiency and active area records have now reached over 17% and 2 cm 2 , respectively. Thus, the authors believe that it is now a useful time for an evaluation of the current state-of-the-art and challenges going forward, as well as for a comprehensively ...

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Section: Introductionmentioning

confidence: 53%

Advances in Carbon Nanotube–Silicon Heterojunction Solar Cells

Tune

Flavel

2018

Advanced Energy Materials

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“…In most cases, the responsivity of graphene or RGO is in range of few mA.W -1 or less. [13,14,42,[54][55][56][57][58][59][60][61][62] Due to poor absorption and fast carrier recombination, EQE is very low for monolayer or very few layer graphene based photodetector. The responsivity and EQE values of our RGOs are comparable with the graphene nano-ribbon as an active material.…”

Section: Methodsmentioning

confidence: 99%

Reduced graphene oxide film based highly responsive infrared detector

Khan¹,

Krupanidhi²

2017

Mater. Res. Express

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Due to the unique optical properties, graphene can effectively be used for the detection of infrared light. In this regard, reduced graphene oxide (RGO) has drawn considerable attention in scientific society because of simplicity of preparation and tunable properties. Here, we report the synthesis of RGO by solvothermal reduction of graphene oxide (GO) in ethanol and the detection of infrared light (1064 and 1550 nm) with metal-RGO-metal configuration. We have observed that photocurrent, responsivity as well as the external quantum efficiency increase with C/O ratio. The responsivity value in near-infrared region can be as high as 1.34 A.W-1 and the external quantum efficiency is more than 100%. Response times of these devices are in the order of few seconds. Overall, the responsivity of our device is found to be better than many of the already reported values where graphene or reduced graphene oxide is the only active material. The high value of quantum efficiency is due to strong light absorption and the presence of mid-gap state in RGOs.

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“… 97 Unlike single walled carbon nanotubes (SWCNT), which is having strong wavelength dependent spectra, GO generally respond to almost all the wavelength due to its wide absorption range 98 ; Thus, rGO-based photodetectors generally show photo detection from UV 97 , 99 to IR. 100 , 101 , 102 , 103 In rGO-based photodetectors, it is generally observed that the photo current depends on the photo illumination position owing to the locally generated electric field via the Schottky barrier. 104 , 105 , 106 Even though, there are photodetectors based on TMDs, compared to graphene it is still in its infancy stage.…”

Section: Applications Of 2d Materials In Both the Academic And Indust...mentioning

confidence: 99%