Vertically aligned ZnO/Ga<sub>2</sub>O<sub>3</sub> core/shell nanowire arrays as self-driven superior sensitivity solar-blind photodetectors

You, Daotong; Xu, Chunxiang; Zhao, Jie; Zhang, Wei; Qin, Feifei; Chen, Jinping; Shi, Zengliang

doi:10.1039/c9tc00134d

Cited by 55 publications

(32 citation statements)

References 40 publications

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“…The data for this figure has been compiled from refs. [16,[41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77].…”

Section: Basics Of Photodetectormentioning

confidence: 99%

A Strategic Review on Gallium Oxide Based Deep‐Ultraviolet Photodetectors: Recent Progress and Future Prospects

Kaur

Kumar

2021

Advanced Optical Materials

279

153

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With the use of UV‐C radiation sterilizers on the rise in the wake of the recent pandemic, it has become imperative to have health safety systems in place to curb the ill‐effects on humans. This requires detection systems with suitable spectral response to the “invisible to the naked eye” radiation leaks with utmost sensitivity and swiftness. State of the art deep‐UV photodetectors based on the wide bandgap material gallium oxide have achieved responsivities up to few hundred A W−1 while the minimum response time achieved is few hundred nanoseconds. However, due to the trade‐off between these two key parameters, the ultimate performance of the photodetectors remains inadequate. The focus here is to give a thorough review of the gallium oxide based photodetectors, their recent progress and future prospects. This review highlights the fundamental physics and the key parameters such as dark current, responsivity, and response time with their dependence on the material properties. Exploration of the reasons behind current scenario in the field of gallium oxide is comprehensively and critically analyzed. The key challenges which limit device performance and inhibit the realization of real‐world practical detectors are also described. The lacunae currently plaguing the field is also discussed with possible remedial solutions.

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Section: Basics Of Photodetectormentioning

confidence: 99%

A Strategic Review on Gallium Oxide Based Deep‐Ultraviolet Photodetectors: Recent Progress and Future Prospects

Kaur

Kumar

2021

Advanced Optical Materials

279

153

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“…In addition, the responsivity (R) is one of the critical parameters to evaluate the performance of photodetectors and typically defined as follows: R=(I photo -I dark ) / (S×P light ), where S is the effective irradiated area, P light is the incident light intensity density. Specific detectivity (D * ) is another important parameter, which is defined as: D * =R / (2qJ dark ) 1/2 , where R is the responsivity, q is the electron charge, J dark is the dark current density [5,21]. According to the above equations, the R and D * of PD2 are calculated to be 1.44 mA W −1 and 5.9×10 10 cm Hz 1/2 /W (Jones), respectively.…”

Section: Resultsmentioning

confidence: 99%

Enhanced photoresponse in ZnO nanorod array/p-GaN self-powered ultraviolet photodetectors via coupling with CuO nanostructures

Yao

Peng

et al. 2020

Mater. Res. Express

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ZnO nanorod arrays (ZnO NRAs) coupled with coral-like CuO nanostructures (CuO CLNs) were prepared by low-temperature hydrothermal method. Self-powered ultraviolet (UV) photodetectors (PDs) based on ZnO NRAs/CuO CLNs/p-GaN heterostructure were fabricated via a direct-contact method. Under UV illumination (1.46 mW cm −2 ), the ratios of photocurrent to dark current (I photo /I dark ), photo-responsivity and specific detectivity for the ZnO NRAs/CuO CLNs/p-GaN heterojunction self-powered PD were estimated to be 1143, 1.44 mA W −1 and 5.9×10 10 cm H z 1 /2 /W at 0 V, which were about ∼187, ∼104 and ∼153 times greater than those of the ZnO NRAs/ p-GaN self-powered PD, respectively. Moreover, the PD displayed faster response time, excellent stability and repeatability by coupling with CuO CLNs. The mechanism of the enhanced photoresponse performance was discussed through the energy band diagram.

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“…Numerous self-powered UV photodetectors based on core–shell p-n heterojunction have already been reported by many groups [ 70 , 71 , 72 , 73 , 74 ]. As shown in Figure 3 a, Dunn and coworkers fabricated a self-powered ZnO-Nanorod/CuSCN UV photodetector exhibiting rapid response using the method of an array of ZnO nanorods 2–3 μm in length and 70–100 nm in diameter coated with a layer of CuSCN [ 75 ].…”

Section: Improving the Performance Of Self-powered Uv Photodetectors ...mentioning

confidence: 99%

Advances in Self-Powered Ultraviolet Photodetectors Based on P-N Heterojunction Low-Dimensional Nanostructures

et al. 2022

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Self-powered ultraviolet (UV) photodetectors have attracted considerable attention in recent years because of their vast applications in the military and civil fields. Among them, self-powered UV photodetectors based on p-n heterojunction low-dimensional nanostructures are a very attractive research field due to combining the advantages of low-dimensional semiconductor nanostructures (such as large specific surface area, excellent carrier transmission channel, and larger photoconductive gain) with the feature of working independently without an external power source. In this review, a selection of recent developments focused on improving the performance of self-powered UV photodetectors based on p-n heterojunction low-dimensional nanostructures from different aspects are summarized. It is expected that more novel, dexterous, and intelligent photodetectors will be developed as soon as possible on the basis of these works.

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Vertically aligned ZnO/Ga₂O₃ core/shell nanowire arrays as self-driven superior sensitivity solar-blind photodetectors

Abstract: Well-aligned ZnO/Ga2O3 core/shell nanowire arrays were fabricated by VPT and the sputtering method as self-driven solar-blind photodetectors.

Cited by 55 publications

References 40 publications

A Strategic Review on Gallium Oxide Based Deep‐Ultraviolet Photodetectors: Recent Progress and Future Prospects

A Strategic Review on Gallium Oxide Based Deep‐Ultraviolet Photodetectors: Recent Progress and Future Prospects

Enhanced photoresponse in ZnO nanorod array/p-GaN self-powered ultraviolet photodetectors via coupling with CuO nanostructures

Advances in Self-Powered Ultraviolet Photodetectors Based on P-N Heterojunction Low-Dimensional Nanostructures

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Vertically aligned ZnO/Ga2O3 core/shell nanowire arrays as self-driven superior sensitivity solar-blind photodetectors

Abstract: Well-aligned ZnO/Ga2O3 core/shell nanowire arrays were fabricated by VPT and the sputtering method as self-driven solar-blind photodetectors.

Cited by 55 publications

References 40 publications

A Strategic Review on Gallium Oxide Based Deep‐Ultraviolet Photodetectors: Recent Progress and Future Prospects

A Strategic Review on Gallium Oxide Based Deep‐Ultraviolet Photodetectors: Recent Progress and Future Prospects

Enhanced photoresponse in ZnO nanorod array/p-GaN self-powered ultraviolet photodetectors via coupling with CuO nanostructures

Advances in Self-Powered Ultraviolet Photodetectors Based on P-N Heterojunction Low-Dimensional Nanostructures

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Vertically aligned ZnO/Ga₂O₃ core/shell nanowire arrays as self-driven superior sensitivity solar-blind photodetectors