Effect of N and Cu Doping on Structure, Surface Morphology and Photoluminescence Properties of ZnO Thin Films

Liton, M. N. H.; Khan, Khalilur Rahman; Rahman, M. Mozibur; Islam, Muhammad Monirul

doi:10.3329/jsr.v7i1-2.19573

Cited by 16 publications

(7 citation statements)

References 20 publications

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“…Interestingly, higher annealing temperatures (300 °C and 400 °C) introduce minor peaks at 56.59°, 52.63°, 56.75°, and 70.9°, respectively. This non-monotonic trend suggests a complex interplay between B-doping and annealing temperature on crystallographic orientation, consistent with previous reports on doping and temperature-dependent phenomena [37].…”

Section: Structural Propertiessupporting

confidence: 91%

“…This phenomenon strengthens with increasing temperatures. Interestingly, the opposite trend is observed for BZO films, where crystallite sizes increase with higher annealing temperatures, reaching a maximum at 300 °C [37]. This reveals that the dislocation density in ZnO films peaks at an annealing temperature of 300 °C, while for BZO films, it reaches a maximum at 200 °C.…”

Section: Structural Propertiesmentioning

confidence: 86%

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Effect of boron-doping and annealing on the structure, morphological and optical properties of ZnO films prepared by spray pyrolysis method

Al-Qadasy,

Al-Arique,

Kaawash

et al. 2024

Phys. Scr.

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Investigations have been conducted into the structure, morphology, thickness, and optical properties of ZnO thin film upon doping it with Boron from boric acid (H3BO3) at a constant concentration and annealing it at various temperatures (200, 300, and 400 °C). The thin films were formed on glass substrates using the spray pyrolysis process at 250°C, and they were then annealed for two hours in air at various temperatures. It was discovered that the annealing temperature and boron doping had a substantial impact on all properties of the ZnO nanostructure. The polycrystalline hexagonal wurtzite structure is present in both ZnO and BZO thin films. With high optical transmission (≥70%), crystallite diameters of 25.8 to 28.5 nm for ZnO and 15.96 to 24.80 nm for BZO, respectively, and significant absorbance up to 400 nm at the maximum annealing temperature (400 °C) for both films. Moreover, the as-deposited and annealed BZO films had optical band gaps of 3.04 eV and 2.9 eV, respectively, which are less than the ZnO film's 3.23 eV band gap; in general, as the annealing temperature increased it decreased.

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Section: Structural Propertiessupporting

confidence: 91%

Section: Structural Propertiesmentioning

confidence: 86%

Effect of boron-doping and annealing on the structure, morphological and optical properties of ZnO films prepared by spray pyrolysis method

Al-Qadasy,

Al-Arique,

Kaawash

et al. 2024

Phys. Scr.

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“…As shown in [43], such a form of the decay curves is determined by several processes involving the radiative decay of the luminescence centre, as well as the kinetics of the release of charge carriers from the traps. According to our PL investigation and literature data [44,45] we can to propose the next schemes of the energy levels diagram showing the position of the defect levels in ZnO in our case. (Fig.…”

Section: Optical and Luminescent Propertiesmentioning

confidence: 93%

“…The ESR spectra generated from the ZnO powder prepared from Zn(OH) 2 and calcined at 500°C demonstrates a signal with g = 2.0024. The signal with such a g-factor corresponds to charged Zn vacancies ( [44,45,[48][49][50][51]. To understand the creation of this type of ESR signal, the Zn(OH) 2 precursors heated at 200 and 400°C were also investigated by ESR spectroscopy.…”

Section: Electron Spin Resonance Spectroscopy Datamentioning

confidence: 99%

Photocatalytic activity of ZnO nanopowders: The role of production techniques in the formation of structural defects

et al. 2019

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The effect of the type of structural defect in zinc oxide on its photocatalytic properties was studied for phenol photodegradation under UV-irradiation. It was shown that the use of different types of precursors (zinc oxalate and zinc hydroxide) for the production of zinc oxide leads to the formation of a material with the same phase composition and equal energy of the forbidden band, but different photocatalytic activities. Simultaneously, the peculiarities of the luminescence and electron spin resonance spectra indicate the formation of different types of defects in the structure of the material, namely, oxygen vacancies (V o) in the anionic and zinc vacancies (V Zn) in the cationic sublattices of zinc oxide synthesised from the zinc oxalate and hydroxide, respectively. Also, the different characteristics of the luminescence decays reveal the different recombination paths for the free charge carriers in the systems synthesised from the different precursors. The different times of the luminescence decay also confirmed the different methods of recombination of free charge carriers in systems synthesised from different precursors. It was shown that the appearance of defects in the cationic sublattice leads to a decrease in the photocatalytic activity of the material relative to phenol degradation. Recently, several reviews have been published on the photocatalytic

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“…Furthermore, another debatable report published by Rajeh et al (2016) in which they claim that the crystal growth plane of ZnO does not change with Ni-doping. However, elemental doping may change crystal habit plane for ZnO doping with (Cu, N) as reported by Liton et al, (2015). Therefore, there are still many controversies remains in experimental results and explanation of physics.…”

Section: Introductionmentioning

confidence: 98%

Effect of Ni doping on structure, morphology and opto-transport properties of spray pyrolised ZnO nano-fiber

Ali

Khan

Karim

et al. 2020

Heliyon

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Nano-fiber structure of ZnO and Ni doped ZnO (Ni:ZnO) transparent thin films have been deposited on glass substrate at 350 C at an ambient atmosphere via spray pyrolysis technique. The structural, surface morphological and opto-electrical properties of ZnO and Ni doped ZnO thin films have been investigated. The XRD patterns show that the films are of polycrystalline in nature having preferential orientation (0 0 2) plane for ZnO changes to (1 0 1) by Ni doping in ZnO matrix. Optical study exhibits red shifting in band gap energy with Ni doping due to spd hybridization and display high absorption coefficient of the order of 10 7 m À1 . The photoluminescence (PL) spectra indicate blue emissions in all samples. Electrical measurement confirms the resistivity of the film decreases remarkably with Ni doping and electrical transport is mainly thermally activated. From Hall Effect study, it is confirmed that all the samples are n-type having carrier concentration of the order of 10 18 cm À3 . Both mobility and carrier concentrations of the films became higher than ZnO sample with the increase of Ni concentration.

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Effect of N and Cu Doping on Structure, Surface Morphology and Photoluminescence Properties of ZnO Thin Films

Cited by 16 publications

References 20 publications

Effect of boron-doping and annealing on the structure, morphological and optical properties of ZnO films prepared by spray pyrolysis method

Effect of boron-doping and annealing on the structure, morphological and optical properties of ZnO films prepared by spray pyrolysis method

Photocatalytic activity of ZnO nanopowders: The role of production techniques in the formation of structural defects

Effect of Ni doping on structure, morphology and opto-transport properties of spray pyrolised ZnO nano-fiber

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