TiO<sub>2</sub> Nanotube Array/Monolayer Graphene Film Schottky Junction Ultraviolet Light Photodetectors

Wang, Mingzheng; Liang, Feng‐Xia; Nie, Biao; Zeng, Longhui; Zheng, Lingxia; Lv, Peng; Yu, Yongqiang; Xie, Chao; Li, Yang Yang; Luo, Lin‐Bao

doi:10.1002/ppsc.201300040

Cited by 58 publications

(32 citation statements)

References 45 publications

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“…As a result, graphene has been widely utilized in various photovoltaic devices14, PDs15, and light-emitting diodes (LEDs)16. Surface plasmons (SPs), the electromagnetic wave induced electrical charges collective oscillation at the surfaces of metals is the pillar stones of application in light trapping1718.…”

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confidence: 99%

Light trapping and surface plasmon enhanced high-performance NIR photodetector

Luo

Zeng

Xie

et al. 2014

Sci Rep

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143

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Heterojunctions near infrared (NIR) photodetectors have attracted increasing research interests for their wide-ranging applications in many areas such as military surveillance, target detection, and light vision. A high-performance NIR light photodetector was fabricated by coating the methyl-group terminated Si nanowire array with plasmonic gold nanoparticles (AuNPs) decorated graphene film. Theoretical simulation based on finite element method (FEM) reveals that the AuNPs@graphene/CH3-SiNWs array device is capable of trapping the incident NIR light into the SiNWs array through SPP excitation and coupling in the AuNPs decorated graphene layer. What is more, the coupling and trapping of freely propagating plane waves from free space into the nanostructures, and surface passivation contribute to the high on-off ratio as well.

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confidence: 99%

Light trapping and surface plasmon enhanced high-performance NIR photodetector

Luo

Zeng

Xie

et al. 2014

Sci Rep

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143

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“…What is more, the photocurrent for AuNPs@ZnTeNW is increased by sevenfold from 17.7 to 142 nA, yielding an increase of on/off ratio from 18.4 to 98.6. To quantitatively evaluate the influence of plasmonic nanoparticles on the device performance of green light nano-photodetector, the responsivity, gain, and detectivity that reflect the photodetector sensitivity to incident light were calculated by using the following equations [34,35]:…”

Section: Resultsmentioning

confidence: 99%

Surface Plasmon-Enhanced Nano-photodetector for Green Light Detection

Luo

Zheng

et al. 2015

Plasmonics

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Light manipulation is vitally important for onedimensional semiconductor nanostructure-based photodetectors which have great potential in future optoelectronic circuits, imaging technique, and light-wave communication. In this paper, we reported a plasmonic gold nanoparticle (AuNP)-decorated nano-photodetector for green light sensing. It is found that the as-fabricated device exhibits obvious increase in light absorption in the range from 400 to 550 nm, after functionalization of plasmonic AuNPs. Further device performance analysis reveals that the photocurrent of the plasmonic photodetector was increased by more than sevenfold, compared with that without coating. What is more, both responsivity and detectivity are found to increase as well. According to theoretical simulation based on the finite element method (FEM), the observed enhancement in device performance can be attributed to the surface plasmoninduced direct electron injection from the metal nanoparticles to the semiconductor nanostructures.

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“…Our photoresponse study further suggests that leading to considerable increase in On/Off ratio (from 147 to 1066). In order to quantitatively evaluate the performance of the present and other Bi 2 S 3 nanostructures based devices, several key parameters including responsivity (R), conductivity gain (G), and detectivity (D) are calculated using the following equations: [36], [37] …”

Section: Resultsmentioning

confidence: 99%