A graphene/single GaAs nanowire Schottky junction photovoltaic device

Luo, Yong; Yan, Xin; Zhang, Jinnan; Li, Bang; Wu, Yao; Lu, Qichao; Jin, Chenxiaoshuai; Zhang, Xia; Ren, Xiaomin

doi:10.1039/c8nr00158h

Cited by 68 publications

(31 citation statements)

References 43 publications

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“…At zero bias, the photodetector exhibits an ≈3.5 × 105 high light on/off ratio and a photoresponse time of 82 µs, which indicates that the CdSe/graphene Schottky junction has a good application prospect as a self‐powered photodetector. Luo et al fabricated a graphene/single GaAs nanowire Schottky junction photovoltaic device by covering single‐layer graphene on an n‐doped GaAs nanowire. The device has a high photoresponsivity of 231 mA W −1 and a fast photoresponse/recovery time of 85/118 µs at zero bias under 532 nm laser excitation.…”

Section: D Material‐based Schottky Junction Photodetectorsmentioning

confidence: 99%

Self‐Powered Photodetectors Based on 2D Materials

Qiao

Huang

Ren

et al. 2019

Advanced Optical Materials

288

225

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Self‐powered photodetectors are considered as a new type of photodetectors enabling self‐powered photodetection without external power. The excellent photoresponsivity, fast photoresponse rate, low dark current, and large light on/off ratio of these photodetectors have attracted wide interest among scholars. 2D materials are widely used in self‐powered photodetectors due to their excellent optical and electrical properties, unique 2D structures, and their capabilities to exhibit excellent photodetection performance. According to the self‐driving mechanism of 2D material‐based self‐powered photodetectors, they are divided into three categories: p–n junction photodetectors, Schottky junction photodetectors, and photoelectrochemical photodetectors. From these three perspectives, the research progress of 2D material‐based self‐powered photodetectors is summarized in detail here. Research reports indicate that 2D material‐based self‐powered photodetectors have excellent self‐powered photoresponse behavior, good light on/off characteristics, and wideband spectral response ranges. The excellent photoresponse performance of 2D material‐based self‐powered photodetectors facilitates their potential applications in the field of optoelectronic devices. In particular, self‐powered photodetectors have great potential as novel emerging self‐driven optoelectronic devices. Finally, directions for the further development of 2D material‐based self‐powered photodetectors are anticipated.

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Section: D Material‐based Schottky Junction Photodetectorsmentioning

confidence: 99%

Self‐Powered Photodetectors Based on 2D Materials

Qiao

Huang

Ren

et al. 2019

Advanced Optical Materials

288

225

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“…It can be speculated that there is still large room for improvement by optimizing graphene and the interface quality. As the photodiode shares similar working mechanism with the solar cell, a series of other 1D nanomaterials has also been combined with graphene for GR‐1D MDWs solar cells, such as GaAs nanowires, CdS nanowires, and CdSe nanobelts . But the PCE in these structures remains very low, further optimization of the performance will be needed.…”

Section: Gr‐based Mixed‐dimensional Structure For Optoelectronicsmentioning

confidence: 99%

Section: Gr‐based Mixed‐dimensional Structure For Optoelectronicsmentioning

confidence: 99%

Graphene‐Based Mixed‐Dimensional van der Waals Heterostructures for Advanced Optoelectronics

et al. 2019

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Although the library of 2D atomic crystals has greatly expanded over the past years, research into graphene is still one of the focuses for both academia and business communities. Due to its unique electronic structure, graphene offers a powerful platform for exploration of novel 2D physics, and has significantly impacted a wide range of fields including energy, electronics, and photonics. Moreover, the versatility of combining graphene with other functional components provides a powerful strategy to design artificial van der Waals (vdWs) heterostructures. Aside from the stacked 2D–2D vdWs heterostructure, in a broad sense graphene can hybridize with other non‐2D materials through vdWs interactions. Such mixed‐dimensional vdWs (MDWs) structures allow considerable freedom in material selection and help to harness the synergistic advantage of different dimensionalities, which may compensate for graphene's intrinsic shortcomings. A succinct overview of representative advances in graphene‐based MDWs heterostructures is presented, ranging from assembly strategies to applications in optoelectronics. The scientific merit and application advantages of these hybrid structures are particularly emphasized. Moreover, considering possible breakthroughs in new physics and application potential on an industrial scale, the challenges and future prospects in this active research field are highlighted.

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“…The above discussed methods are the common techniques for growth of nanowires, but there have also been reports of various improvements on existing techniques to show high efficiencies. MOCVD was used to report a PCE of 8.8% in graphene/single nanowire Schottky junction solar cell [339,340]. Nanowire solar cells with efficient light management has the capability to outperform their bulk counterparts both in efficiency and cost.…”

Section: Fabrication Techniquesmentioning

confidence: 99%

Nanostructured photovoltaics

2019

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In this review, we begin by discussing the need for harnessing renewable energy resources in the context of global energy demands. A summary of firstand second-generation solar cells, their efficiency and grid parity is provided, followed by the need to reduce material and installation costs, and achieve higher efficiencies beyond the Shockley-Queisser limit imposed on single junction cells. We also discuss the specific advantages offered by nanomaterials in enhanced energy harvesting, what design platforms comprise nanostructured photovoltaics, and list the prominent categories of nanomaterials used in the design of third generation solar cells. We review the significant nanostructured photovoltaic platforms that have encouraging power conversion efficiencies, have the potential for long term stability (both structural and functional) and have received attention in the field. In addition to their operational principle, we highlight both their advantages and shortcomings, along with insights into possible improvements. We include alternate routes to improving power conversion efficiency, not by tuning material properties to match the solar spectrum but using additives and/or structural modifications to allow more efficient harvesting of sunlight, either by reducing losses or by altering the spectral properties. The properties of nanomaterials that make them well-suited as active materials in photovoltaic devices (broadband absorption, high quantum yield, etc.) also make them ideal candidates for luminescent solar concentrators (LSCs). These devices also harvest solar energy, but instead of directly allowing charge generation, they act as downconverters for other photovoltaic cells. We review dye, thin film, and quantum dot based LSCs that have garnered a lot of attention in recent years as these devices face a resurgence given the advances in materials science and engineering which have led to novel quantum dots and hybrid semiconductors. The review ends with where the future of nanostructured photovoltaics is headed, what device designs and materials development are needed to achieve efficiencies beyond the Shockley-Queisser limits and fulfil the goal of the 3rd and 4th generation photovoltaics.

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A graphene/single GaAs nanowire Schottky junction photovoltaic device

Cited by 68 publications

References 43 publications

Self‐Powered Photodetectors Based on 2D Materials

Self‐Powered Photodetectors Based on 2D Materials

Graphene‐Based Mixed‐Dimensional van der Waals Heterostructures for Advanced Optoelectronics

Nanostructured photovoltaics

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