Present advances and perspectives of broadband photo-detectors based on emerging 2D-Xenes beyond graphene

Wang, Bing; Zhong, Shipeng; Ge, Yanqi; Wang, Huide; Luo, Xiaoling; Zhang, Han

doi:10.1007/s12274-020-2749-1

Cited by 42 publications

(36 citation statements)

References 397 publications

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“…For the CdSe QDs/rGO film, peaks of G band and D band are displayed at 1336 and 1580 cm −1 , respectively. The D band is resulted from the breathing mode of the K-point phonons of A1g symmetry involving phonons near the K zone boundary, while the G band is ascribed to the first order scattering of phonons with E2g symmetry of the sp 2 carbon atoms [58]. The remarkable blue shift of D band in the CdSe QDs/rGO Raman spectrum could be attributed to the strong chemical interaction between CdSe QDs and rGO.…”

Section: Resultsmentioning

confidence: 93%

“…Compared with traditional plasmonic metal materials, quantum dots (QDs) offer many advantages such as high extinction coefficients, narrower photoluminescence (PL) spectra, brighter fluorescence, and ability to modify the semiconductor bandgap [51], [52]. Additionally, QDs can emit light at different wavelength by controlling the size, shape, or type of QDs [53]- [58]. This characteristic provides an effective way to tune the spectral response over a wide range for optoelectronic device applications.…”

Section: Introductionmentioning

confidence: 99%

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Low-Power, Large-Area and High-Performance CdSe Quantum Dots/Reduced Graphene Oxide Photodetectors

et al. 2020

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Graphene has unique and outstanding properties that make it a promising material for many applications. It has triggered considerable research in fields including solar cells, photodetectors, electrodes, and supercapacitors. Despite the favorable characteristics of devices using graphene have been widely explored, issues such as low absorbance, complex processing, and limited device size remain. Hence, we present large-area CdSe quantum dots (QDs)/reduced graphene oxide (rGO) films and corresponding photodetectors through a cost-effective and simple spin-coating method. As light turns on, CdSe QDs are excited and generate excess electron-hole pairs, leading to a significantly increased on/off current ratio of 2195 at a low bias voltage of −1 V, compared to that of photodetectors without CdSe QDs. Decorating the rGO film with CdSe QDs enables the wavefunction modulation and enhances the light harvesting. Our proposed high-performance photodetector can be operated at a low voltage, which is beneficial for applications in various green and low-power consumption devices. INDEX TERMS Large area, low power, photodetectors, reduce graphene oxide, CdSe quantum dots.

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Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Low-Power, Large-Area and High-Performance CdSe Quantum Dots/Reduced Graphene Oxide Photodetectors

et al. 2020

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“…), are also expected to be coupled with optical architectures for device performance improvement. 48,163 dimensional layered materials and devices, organic semiconductors, nanomaterials and nanoscopic characterization, and high thermal conductive materials. He is a Fellow of IEEE and HKIE, and recipient of Vice-Chancellor's Outstanding Fellow of Engineering, CUHK.…”

Section: Discussionmentioning

confidence: 99%

“…In recent years, some BP-analogue monoelemental 2D materials (Xenes, for example, silicene, germanene, arsenene, antimonene, bismuthene, and tellurene) have emerged as promising candidates for optoelectronics because they display unique properties, such as high carrier mobilities, direct and tunable band structures, and large anisotropic effects. [48][49][50][51]…”

Section: Bpmentioning

confidence: 99%

Enhancing light‐matter interaction in 2D materials by optical micro/nano architectures for high‐performance optoelectronic devices

Tao

Chen

et al. 2020

InfoMat

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Two-dimensional materials are a promising solution for next-generation electronic and optoelectronic devices due to their unique properties. Owing to the atomic thickness of 2D materials, the light-matter interaction length in 2D materials is much shorter than that in bulk materials, which limits the performance of optoelectronic devices composed of 2D materials. To improve the light-matter interactions, optical micro/nano architectures have been introduced into 2D material optoelectronic devices. In this review, we present a concise introduction and discussion of various strategies for the enhancement of lightmatter interaction in 2D materials, namely, the plasmonic effect, waveguide, optical cavity, and reflection architecture. We have outlined the current advances in high-performance 2D material optoelectronic devices (eg, photodetectors, electrooptic modulators, light-emitting diodes, and molecular sensors) assisted by these enhancement strategies. Finally, we have discussed the future challenges and opportunities of micro/nano photonic structure designs in 2D material devices.

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“…In recent years, new series of photo-active semi-conductive materials especially 2D materials, such as transition metal dichalcogenides (TMDCs), 13 topological insulator, phosphorene, 14 perovskite, 15 MXenes 16 and antimonene, 17 have attracted more attentions. 14,[18][19][20][21][22][23] Some of 2D materials are experimentally and theoretically verified with specific merits, including tunable band structures, layer-dependent properties, high carrier mobility, and strong light absorption. Besides, 2D materials are more suitable for solution processing method, which is a low-cost and high-yield fabrication method.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional monoelemental germanene nanosheets: facile preparation and optoelectronic applications

Kang

Xie

et al. 2020

J. Mater. Chem. C

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Present advances and perspectives of broadband photo-detectors based on emerging 2D-Xenes beyond graphene

Cited by 42 publications

References 397 publications

Low-Power, Large-Area and High-Performance CdSe Quantum Dots/Reduced Graphene Oxide Photodetectors

Low-Power, Large-Area and High-Performance CdSe Quantum Dots/Reduced Graphene Oxide Photodetectors

Enhancing light‐matter interaction in 2D materials by optical micro/nano architectures for high‐performance optoelectronic devices

Two-dimensional monoelemental germanene nanosheets: facile preparation and optoelectronic applications

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