Effect of Plasma Treatment on the Luminescent and Scintillation Properties of Thick ZnO Films Fabricated by Sputtering of a Hot Ceramic Target

Tarasov, Andrey P.; Ismailov, Abubakar M.; Gadzhiev, Makhach Kh.; Venevtsev, Ivan D.; Muslimov, Arsen E.; Volchkov, Ivan S.; Aidamirova, Samira R.; Tyuftyaev, Alexandr S.; Butashin, Andrey V.; Kanevsky, Vladimir M.

doi:10.3390/photonics10121354

Cited by 2 publications

(1 citation statement)

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“…Zinc oxide is characterized by its high optical transparency in the visible range (gap energy ~3.4 eV), and exhibits a picosecond-scale exciton lifetime within its UV fluorescence [30]. This property gives it significant promise for application in scintillation detectors [31], thus playing an interesting role in optoelectronic technology. Additionally, due to the deviation from stoichiometry, there are defect-related emissions in the visible optical range under UV excitation.…”

Section: Introductionmentioning

confidence: 99%

Exploring Na Doping in ZnO Thin Films: Electrical and Optical Insights

Silva,

Vargas,

Peres

et al. 2024

Coatings

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Strategies to achieve p-type behavior in semiconductor oxides are an important current topic of research. Our study showed that sodium-doped zinc oxide thin films are a plausible approach. The insertion of dopant allowed a transition between n-type p-type electrical behavior in specific temperature ranges around 300 K. Annealing procedures under controlled atmospheres, including Ar, N2, and O2, increased the hole density up to a magnitude of 1016 cm−3, although this also reduced the window temperature. The micro-photoluminescence spectra showed an enhancement of defect-related emissions as the dopant content increased. Notably, yellow-green emissions (around 2.38 eV–520 nm) were the most prominent in the as-grown samples. After annealing, a strong redshift of the defect band was observed (around 1.85 eV–670 nm). Our findings showed that p-type ZnO:Na films exhibited emissions associated with RGB primary colors. In a chromaticity diagram, as-grown samples appeared near the white range, annealed films were close to the warm white area, and O2 annealed films trended within the red range.

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Section: Introductionmentioning

confidence: 99%

Exploring Na Doping in ZnO Thin Films: Electrical and Optical Insights

Silva,

Vargas,

Peres

et al. 2024

Coatings

View full text Add to dashboard Cite

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Emission mechanisms in low-threshold UV random laser based on ZnO microrod array

Tarasov,

Zadorozhnaya,

Kanevsky

2024

Journal of Applied Physics

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Despite rather extensive study of the random lasing effect in ZnO structures, the issue of the optical gain mechanisms in microstructured ZnO random lasers remains poorly understood. In this work, the radiative properties of an array of vertically aligned ZnO microrods, synthesized by a modified thermal evaporation method, were studied. The microrods exhibited lengths up to 60 μm and diameters ranging from 1 to 5 μm. Random lasing from a microrod array was observed in the near-UV range (with a laser emission peak wavelength of ∼391 nm) with a threshold down to 40 kW/cm2 under optical excitation. An analysis of the nature of optical gain in the grown structure was conducted at various temperatures. It was found that at room temperature, two-phonon-assisted exciton recombination is the main process leading to light amplification.

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Effect of Plasma Treatment on the Luminescent and Scintillation Properties of Thick ZnO Films Fabricated by Sputtering of a Hot Ceramic Target

Cited by 2 publications

References 63 publications

Exploring Na Doping in ZnO Thin Films: Electrical and Optical Insights

Exploring Na Doping in ZnO Thin Films: Electrical and Optical Insights

Emission mechanisms in low-threshold UV random laser based on ZnO microrod array

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