Performance analyses of Schottky diodes with Au/Pd contacts on n-ZnO thin films as UV detectors

Varma, Tarun; Periasamy, C.; Boolchandani, Dharmendar

doi:10.1016/j.spmi.2017.08.060

Cited by 20 publications

(5 citation statements)

References 21 publications

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“…The rise and fall time decrease; thus, the result indicates that the Pd NPs adsorption ZnO nanorods can improve response time. Some significant topics related to Pd/ZnO photodetectors have been reported recently, which are summarized in Table 1 [28][29][30][31][32]. Among the results, our devices have better performance than other group's results.…”

Section: Resultsmentioning

confidence: 67%

Pd Nanoparticle Adsorption ZnO Nanorods for Enhancing Photodetector UV-Sensing Performance

Young

Liu

2021

IEEE J. Electron Devices Soc.

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Ultraviolet (UV) detection is an important index, as UV rays can cause skin diseases in humans. To enhance the performance of UV photodetectors, we fabricated palladium nanoparticles-(Pd NPs) modified ZnO nanorods. The surface morphology is observed by using transmission electron microscopy and transmission electron microscopy. The crystal structure is analysed by using X-ray diffraction. The optical property is investigated by using photoluminescence spectra. The Idark of the ZnO and Pd/ZnO samples was 5.05 × 10 -8 and 2.24 × 10 -9 A when a 1 V bias was applied. On the other hand, the Iphoto of the ZnO and Pd/ZnO samples was 2.56 × 10 -6 and 4.38 × 10 -6 A when the sample is illuminated UV light (365 nm). The current ratio of Iphoto / Idark for the ZnO and Pd/ZnO samples was 50.8 and 1960, respectively. The enhanced performance of the Pd NPs can produce a strong electric field after light is absorbed via the localised surface plasmon resonance effect.

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Section: Resultsmentioning

confidence: 67%

Pd Nanoparticle Adsorption ZnO Nanorods for Enhancing Photodetector UV-Sensing Performance

Young

Liu

2021

IEEE J. Electron Devices Soc.

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“…For example, Shaikh et al (2016) prepared Ag/ZnO/Ag MSM ultraviolet detectors based on ZnO thin films on glass substrates through chemical bath deposition method, showing good ohmic contact behavior between metal semiconductor junctions. Varma et al (2017) studied the performance of ultraviolet detectors based on ZnO thin film Schottky diodes (Au and Pd contacts) using RF magnetron sputtering technology. Zhao et al (2015) prepared the MSM ultraviolet detector based on Mg-ZnO thin film, indicating that the surface treatment of ZnO particles plays a key role in improving the response rate of the detector.…”

Section: Introductionmentioning

confidence: 99%

Study on electronic transport performance of Ag-ZnO film by photoassisted conductive atomic force microscopy

Zhang

2023

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Purpose The purpose of this paper is to study the electronic transport performance of Ag-ZnO film under dark and UV light conditions. Design/methodology/approach Ag-doped ZnO thin films were prepared on fluorine thin oxide (FTO) substrates by sol-gel method. The crystal structure of ZnO and Ag-ZnO powders was tested by X-ray diffraction with Cu Kα radiation. The absorption spectra of ZnO and Ag-ZnO films were recorded by a UV–visible spectrophotometer. The micro electrical transport performance of Ag-ZnO thin films in dark and light state was investigated by photoassisted conductive atomic force microscope (PC-AFM). Findings The results show that the dark reverse current of Ag-ZnO films does not increase, but the reverse current increases significantly under illumination, indicating that the response of Ag-ZnO films to light is greatly improved, owing to the formation of Ohmic contact. Originality/value To the best of the author’s knowledge, the micro electrical transport performance of Ag-ZnO thin films in dark and light state was firstly investigated by PC-AFM.

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“…For example, Shaikh et al fabricated Ag/ZnO/Ag MSM UV detector based on ZnO thin films on glass substrate by chemical bath deposition (CBD), showing good Ohmic contact behavior between metal–semiconductor junctions 19 . Varma et al studied the performance of UV detectors based on ZnO thin‐film Schottky diodes with Au and Pd contacts by RF magnetron sputtering technique 20 . Zhao et al prepared MSM UV detectors based on MgZnO films, showing that the surface treatment of ZnO particles plays a key role in enhancing the responsivity of detector 21 .…”

Section: Introductionmentioning

confidence: 99%

Study on the nanoscale current of ZnO film by photoassisted peak force tunnel atomic force: A novel technique for UV detection

Zhang

Dong

Zhao

et al. 2022

Surface & Interface Analysis

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ZnO film-based ultraviolet (UV) detector was fabricated by photoassisted peak force tunnel atomic force (PFTUNA) on fluorine tin oxide (FTO) substrate. The PFTUNA current in dark and in UV light was $0.1 and 2.0 nA, respectively. The UV sensitivity (photocurrent/dark current) is more than 20. The response time and the recovery time are $0.12 and 0.32 s, respectively. The UV sensing mechanism is that the holes will transport to the ZnO surface to capture the adsorbed oxygen ions to weaken the depletion layer under UV illumination. The PFTUNA current between the tip and the ZnO film is consistent with the Richardson-Schottky (RS) thermionic emission model.

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Performance analyses of Schottky diodes with Au/Pd contacts on n-ZnO thin films as UV detectors

Cited by 20 publications

References 21 publications

Pd Nanoparticle Adsorption ZnO Nanorods for Enhancing Photodetector UV-Sensing Performance

Pd Nanoparticle Adsorption ZnO Nanorods for Enhancing Photodetector UV-Sensing Performance

Study on electronic transport performance of Ag-ZnO film by photoassisted conductive atomic force microscopy

Study on the nanoscale current of ZnO film by photoassisted peak force tunnel atomic force: A novel technique for UV detection

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