Efficient UV–visible photodetector based on single CuO/Cu2O core-shell nanowire

Kajli, Sourav Kumar; Ray, Debraj; Roy, Somnath C.

doi:10.1016/j.jallcom.2021.162546

Cited by 18 publications

(7 citation statements)

References 45 publications

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“…S13 †). Their strong absorptions appeared at 300 to 400 nm, which is consistent with that in the literature 59,60 according to the corresponding equation: αhv = C (hv − E g ) 1/2 where α represents the absorption coefficient, C is a constant, hv is the photon energy, and E g is the band gap energy, and the direct transition, a plot of (αhv) 2 vs. hv shows α curve. Subsequently, the band gap energy of the CW@Cu II -O/Cu II S/Cu(OH) 2 NPs and CW@Cu I/II O/Cu(OH) 2 NPs were input through the linear portion of the curve to the hv axis.…”

Section: Resultssupporting

confidence: 90%

Self-supporting and bifunctional Cu-based electrocatalysts with porous structures as superior working electrodes for alkaline water splitting

Yang

She

et al. 2023

CrystEngComm

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Section: Resultssupporting

confidence: 90%

Self-supporting and bifunctional Cu-based electrocatalysts with porous structures as superior working electrodes for alkaline water splitting

Yang

She

et al. 2023

CrystEngComm

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“…For the device consisting of four CuO NWs, all three parameters are one order of magnitude larger than the value in the single CuO NW case and ns laser irradiation further enhanced these values more than double. For comparison, table 1 also lists the data from other studies which employed CuO nanomaterials for photo-detection at similar wavelengths [21,42,90,91].…”

Section: Resultsmentioning

confidence: 99%

Laser modification of Au–CuO–Au structures for improved electrical and electro-optical properties

et al. 2022

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CuO nanomaterials are one of the metal-oxides that received extensive investigations in recent years due to their versatility for applications in high-performance nano-devices. Tailoring the device performance through the engineering of properties in the CuO nanomaterials thus attracted lots of effort. In this paper, we show that nanosecond (ns) laser irradiation is effective in improving the electrical and opto-electrical properties in the copper oxide nanowires (CuO NWs). We find that ns laser irradiation can achieve joining between CuO NWs and interdigital gold electrodes. Meanwhile, the concentration and type of interband defects in CuO can be controlled by ns laser irradiation as well. An increase in the concentration of defect centers, together with a reduction in the potential energy barrier at the Au/CuO interfaces due to laser irradiation increases electrical conductivity and enhances photo-conductivity. We demonstrate that the enhanced electrical and photo-conductivity achieved through ns laser irradiation can be beneficial for applications such as resistive switching and photo-detection.

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“…Therefore, photo-excited charge carriers undergo recombination in these defects and traps, which decreases the lifetimes of these charge carriers and causes the photosensitivity to decrease. The photocurrent per active area together with the light power is expressed as the responsivity (R) [59,60,61], i.e.,…”

Section: Electrical Characterization Of Non-doped and Bi:cuo/si Heter...mentioning

confidence: 99%

Enhanced Opto-Electronic Properties of Bi:CuO/n-Si Heterojunctions for Photodetector Applications

Sutcu,

Yigit Gezgin,

Baturay

et al. 2024

Acta Phys. Pol. A

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An effective photodetector based on a family of p-type semiconductors with unique properties is still required by current trends in optoelectronics. The purpose of this study is to enhance the performance of p-type copper oxide films by doping them with bismuth. The pure copper oxide films were successfully fabricated with 1, 2, and 3 wt% of Bi by the spin coating method in an air atmosphere. Advanced techniques were used to describe the fabricated non-doped and Bi-doped CuO films to understand their structural, topological, and optical characteristics. X-ray diffraction patterns of non-doped and Bi-doped CuO films have demonstrated that they have polycrystalline structures, with a preference for growth in both (−111) and ( 200) orientations. Copper oxide film with 2% Bi doping exhibited the most uniform particle size distribution compared to others. While 3% Bi-doped CuO thin film exhibits the highest photon absorption, 2% Bi-doped CuO thin film transmits more photons. The direct band gaps of the non-doped and Bi-doped CuO samples were found between 1.77 and 1.94 eV. Copper oxide thin film with 2% Bi has the lowest refractive index. While the 2% Bi-doped CuO heterojunction photodetector shows the highest photosensitivity, responsivity, and detectivity, its rise and time are the lowest. Since 2% Bi-doped CuO film has a good crystal structure, large crystalline size, low particle boundary numbers, and a more homogeneous particle size distribution, the number of traps and defects in this thin film is low, and the recombination of charge carriers is limited. Thus, this thin-film-based heterojunction exhibited the best photodetector property, and the results of this work give a way to create effective photodetectors and adjust their performance over a broad range. topics: Bi-doped CuO, spin coating, photodetector, rise time

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Efficient UV–visible photodetector based on single CuO/Cu2O core-shell nanowire

Cited by 18 publications

References 45 publications

Self-supporting and bifunctional Cu-based electrocatalysts with porous structures as superior working electrodes for alkaline water splitting

Self-supporting and bifunctional Cu-based electrocatalysts with porous structures as superior working electrodes for alkaline water splitting

Laser modification of Au–CuO–Au structures for improved electrical and electro-optical properties

Enhanced Opto-Electronic Properties of Bi:CuO/n-Si Heterojunctions for Photodetector Applications

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