Photosensitive Graphene Transistors

Li, Jinhua; Niu, Liyong; Zheng, Zijian; Yan, Feng

doi:10.1002/adma.201400349

Cited by 325 publications

(288 citation statements)

References 274 publications

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“…Compared with PDs fabricated on rigid substrates such as SiO 2 /Si, flexible PDs have caught the eye of researchers owing to their lightweight and deformable characteristics, and several works have been carried out to explore the relation between the external mechanical forces and the internal optoelectronic performances 139, 140…”

Section: Oihps‐based Pdsmentioning

confidence: 99%

Photodetectors Based on Organic–Inorganic Hybrid Lead Halide Perovskites

2017

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Recent years have witnessed skyrocketing research achievements in organic–inorganic hybrid lead halide perovskites (OIHPs) in the photovoltaic field. In addition to photovoltaics, more and more studies have focused on OIHPs‐based photodetectors in the past two years, due to the remarkable optoelectronic properties of OIHPs. This article summarizes the latest progress in this research field. To begin with, the factors influencing the performance of photodetectors are discussed, including both internal and external factors. In particular, the channel width and the incident power intensities should be taken into account to precisely and objectively evaluate and compare the output performance of different photodetectors. Next, photodetectors fabricated on single‐component perovskites in terms of different micromorphologies are discussed, namely, 3D thin‐film and single crystalline, 2D nanoplates, 1D nanowires, and 0D nanocrystals, respectively. Then, bilayer structured perovskite‐based photodetectors incorporating inorganic and organic semiconductors are discussed to improve the optoelectronic performance of their pristine counterparts. Additionally, flexible OIHPs‐based photodetectors are highlighted. Finally, a brief conclusion and outlook is given on the progress and challenges in the field of perovskites‐based photodetectors.

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Section: Oihps‐based Pdsmentioning

confidence: 99%

Photodetectors Based on Organic–Inorganic Hybrid Lead Halide Perovskites

2017

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“…This has led to the 'greybody' radiation 28,29 and limited responsivity in graphene photon detectors 30 . Various routes have been employed to improve the performance of graphene optoelectronic devices, such as, photon gating effects [31][32][33] , introducing electron trapping centers 34 , placing the device inside an optical cavity 35,36 , on a waveguide [37][38][39][40] or photonic crystal 41,42 , coupling with an antenna 22,23 , or gold nanostructures 43,44 , utilizing plasmon resonances 16,18,45 , etc..…”

Section: Manuscript Textmentioning

confidence: 99%

Antenna Enhanced Graphene THz Emitter and Detector

et al. 2015

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Recent intense electrical and optical studies of graphene have pushed the material to the forefront of optoelectronic research. Of particular interest is the few terahertz (THz) frequency regime where efficient light sources and highly sensitive detectors are very challenging to make. Here we present THz sources and detectors made with graphene field effect transistors (GFETs) enhanced by a double-patch antenna and an on-chip silicon lens. We report the first experimental observation of 1-3 THz radiation from graphene, as well as four orders of magnitude performance improvements in a GFET thermoelectric detector operating at ~2 THz. The quantitative analysis of the emitting power and its unusual charge density dependence indicate significant non-thermal contribution from the GFET. The polarization resolved detection measurements with different illumination geometries allow for detailed and quantitative analysis of various factors that contribute to the overall detector performance. Our experimental results represent a significant advance towards practically useful graphene THz devices. Subject terms: Physical sciences, Materials science, Condensed matter3 Manuscript textThe gapless electronic structure of graphene 1 is a unique property that has drawn significant attention from both basic sciences and practical applications 2 . In particular, it enables broadband interaction of photons with the two dimensional (2D) atomic layer from the far infrared up to the ultraviolet 3 . This has led to various optoelectronic devices operating with photons in the visible 4-7 , near infra-red [8][9][10][11] , mid infra-red [12][13][14][15][16] and far infrared [17][18][19][20][21][22][23][24] . Applications of graphene field effect transistors (GFET) in the few terahertz (THz) frequency range are particularly appealing since it's one of the least developed regimes lying in the gap between efficient manipulation with electronics and photonics [25][26][27] . Here we perform combined THz emission-detection measurements using devices made with monolayer graphene. Our results represent the first study of THz emission from graphene, as well as significant improvements in GFET thermoelectric THz detectors.A common bottleneck in graphene photonic and optoelectronic devices is the limited light-matter interaction, because of the 2D crystal's sub-nanometer thickness.This has led to the 'greybody' radiation 28,29 range that is notoriously difficult to work with. For the emitter, we observe a radiated power that is significantly larger than the anticipated thermal radiation, suggesting additional radiation channels at our disposal for devising efficient graphene THz sources.For the detector, we achieve four orders of magnitude sensitivity improvements, which, in conjunction with its high speed 19,20 , makes the GFET a strong competitor to other contemporary THz sensors.The antenna is designed to have a size of 45×31 µm 2 as shown in Fig.1 indicates an optimal operation frequency of 2.1THz. The electric field distribution at ...

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“…Since two eminent scientists, Andre Geim and Konstantin Novoselov, were given the 2010 Nobel Prize in Physics for 2-dimensional sheet-like material graphene, the research in this field has exponentially expanded its territory beyond electronics and chemistry with developing an ultrafast conductor toward biological and biomedical field [1][2][3][4][5][6][7]. Known for its remarkable structural and physicochemical properties, graphene has attracted a substantial amount of interest in numerous fields in science including/especially in nanoscience/ medicine/technology.…”

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confidence: 99%

Radio-graphene in Theranostic Perspectives

Hwang

2016

Nucl Med Mol Imaging

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Owing to its unique physicochemical properties such as high surface area, notable biocompatibility, robust mechanical strength, high thermal conductivity, and ease of functionalization, 2D-layered graphene has received tremendous attention as a futuristic nanomaterial and its-associated research has been rapidly evolving in a variety of fields. With the remarkable advances of graphene especially in the biomedical realm, in vivo evaluation techniques to examine in vivo behavior of graphene are largely demanded under the hope of clinical translation. Many different types of drugs such as the antisense oligomer and chemotherapeutics require optimal delivery conveyor and graphene is now recognized as a suitable candidate due to its simple and high drug loading property. Termed as 'radio-graphene', radioisotope-labeled graphene approach was recently harnessed in the realm of biomedicine including cancer diagnosis and therapy, contributing to the acquisition of in vivo information for targeted drug delivery. In this review, we highlight current examples for bioapplication of radiolabeled graphene with brief perspectives on future strategies in its extensive bio-or clinical applications.

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Photosensitive Graphene Transistors

Cited by 325 publications

References 274 publications

Photodetectors Based on Organic–Inorganic Hybrid Lead Halide Perovskites

Photodetectors Based on Organic–Inorganic Hybrid Lead Halide Perovskites

Antenna Enhanced Graphene THz Emitter and Detector

Radio-graphene in Theranostic Perspectives

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