Effect of indium incorporation, stimulated by UHV treatment, on the chemical, optical and electronic properties of ZnO thin film

Bedrouni, Mahmoud; Kharroubi, Bachir; Ouerdane, A.; Bouslama, M.; Guezzoul, M’hamed; Caudano, Yves; Bensassi, Kada Belmokhtar; Bousmaha, Mohamed; Bezzerrouk, Mohamed Amine; Mokadem, A.; Abdelkrim, Mahfoud

doi:10.1016/j.optmat.2020.110560

Cited by 24 publications

(10 citation statements)

References 79 publications

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“…On the basis of these results, we suggest that the binding energy of 3d5/2 and 3d3/2 of indium in Fig. 3D correspond to electron states related to chemical species of In-O-Zn type in agreement with reported results [34]. The calculation of (At% composition) of different elements of UZO and IZO (4% In) and IZO (6% In) are shown in table 2.…”

Section: X -Ray Photoemission Spectroscopy Of Uzo Compared To Izo Aft...supporting

confidence: 88%

A Comparative Study of Un-Doped ZnO and in Doping ZnO Thin Films with Various Concentrations, Subjected to Appropriate UHV Treatment and Characterized by Sensitive Spectroscopy Techniques XPS, AES, Reels and PL

Bensassi

Hameurlaine

Guezzoul

et al. 2022

Annals of West University of Timisoara - Physics

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In this study, we use complementary and sensitive experimental techniques XPS (X-rays Photoelectron Spectroscopy), AES (Auger Electron Spectroscopy, REELS (Reflection Electron Energy-Loss Spectroscopy) and PL (photoluminescence) to investigate and compare the chemical, structure, electronic and optical properties of Un-doped ZnO (UZO) and Indium-doped ZnO (IZO) (4% In; 6% In) thin films. Spray method is used for the growth of these thin films on Si substrate. A treatment process UHV (Ultra-High -Vacuum: Ar+ sputtering followed by checked successive heating until 650°C) is performed. XPS and AES results allow to confirm the clean state of samples and the incorporation of indium into the ZnO matrix to form chemical species of (In-O-Zn) type. The recorded REELS spectra at different primary energies and the PL measurements justify that the UHV treatment plays an important role to improve the physical structure of IZO (6% In).

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Section: X -Ray Photoemission Spectroscopy Of Uzo Compared To Izo Aft...supporting

confidence: 88%

A Comparative Study of Un-Doped ZnO and in Doping ZnO Thin Films with Various Concentrations, Subjected to Appropriate UHV Treatment and Characterized by Sensitive Spectroscopy Techniques XPS, AES, Reels and PL

Bensassi

Hameurlaine

Guezzoul

et al. 2022

Annals of West University of Timisoara - Physics

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“…46 Figure 2c demonstrates the band diagram assuming that the presence of MWCNT does not affect the conduction band edge tremendously, and the band gap of the composite is approximated to that of the pristine ZnO samples and the electrical characteristics are presented in Figure S3. 47 The position of the Fermi level close to the conduction band edge signifies the n-type conduction behavior of the composite; thereby, the availability of a huge number of charge carriers at the conduction band. The right-hand side image shows the work function of gold compared to that of the composite suggesting a Schottky type contact formation between the metal and the semiconductor.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Device-Physics Realization of ZnO–MWCNT Nanostructure-Based Field-Effect Biosensor for Ultrasensitive Simultaneous Genomic Detection of Foodborne Pathogens

Goswami,

Bonam,

Jeyaram

et al. 2023

Anal. Chem.

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The complex and versatile interactions among the wide variety of the nanostructures and the target analytes have primarily limited the detailed investigation of the transduction mechanism of nanomaterial-assisted electrical signal-based biosensors despite their high sensitivity, low-cost, portability, and ease of deployment. Hence, no common ground is formed detailing the principle of operation, demanding a strong need for systematic examination instead of hit and trial. Therefore, a maiden mechanistic investigation has been carried out in this paper for a field-effect-based biosensor device relying on the energy band diagram and the surface potential profile. To demonstrate the experimental evidence and appreciate the importance of food safety, three hazardous foodborne pathogens (Proteus mirabilis, Escherichia coli, and Clostridium botulinum) have been detected herein. The biosensor device, built on a hydrothermally synthesized zinc oxide and MWCNT (ZnO−MWCNT) composite nanostructure, simultaneously incorporates three fairly specific ss-DNA probes. Furthermore, the unmet challenge of biosensor device variability is addressed through the optimum selection of operating voltage of the device via a unique "voltage−selection−algorithm". We believe that the rigorous experimentation and the insightful device-physics realization demonstrated in this work will pave the way for a future decisive biosensor platform.

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“…The violet emission at 420 nm (Peak 2) can be attributed to either a transition (Zn i → VB) ~418 nm or (CB → V Zn ) ~427 nm. The emission peaks 3 and 4 correspond to an electron captured at the extended ex-Zn i recombining with a hole from VB, as several authors associated these transitions with emission at 440–460 nm [ 71 , 72 , 73 , 74 ]. Another possibility could be a recombination of an electron from Zn i level with a hole from the V Zn level, which results in an emission of about 460 nm (Peak 3).…”

Section: Resultsmentioning

confidence: 99%

“…V. Kumar et al [ 81 ] located the V o at ~1.85 eV below the CB resulting in a red emission of 760 nm (Zn i → V o ). M. Bedrouni et al [ 73 ] reported on PL emission of ZnO thin film and showed attributed the red emission to the following transitions CB → V o , V o → VB or H i → V o . It is important to mention that the existence of oxygen vacancies is supported by XPS findings where a signature of these defects is found after deconvolution of the high-resolution oxygen peak.…”

Section: Resultsmentioning

confidence: 99%

pH Controlled Nanostructure and Optical Properties of ZnO and Al-Doped ZnO Nanorod Arrays Grown by Microwave-Assisted Hydrothermal Method

et al. 2022

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The low-temperature microwave-assisted hydrothermal method was used to successfully grow pure and Al-doped ZnO (AZO) nanorod (NR) arrays on glass substrates. The combined effects of doping and pH on the structural properties, surface chemistry, and optical properties of all samples were investigated. Thermodynamic-based simulations of the growth solution were performed and a growth mechanism, that considers the effects of both the pH and Al-doping, is proposed, and discussed. Tuning the solution pH is key parameter to grow well-aligned, single crystal, highly packed, and high aspect ratio nanorod arrays. Moreover, the optical absorption in the visible range is enhanced by controlling the pH value. The PL spectra reveal a shift of the main radiative emission from the band-to-band into a transition involving deep defect levels of Zinc interstitial Zni. This shift is caused by an enhancement of the non-radiative components (phonon relaxation) at high pH values. The production of well-ordered ZnO and AZO nanorod arrays with visible-active absorption/emission centers would increase their potential use in various applications.

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Effect of indium incorporation, stimulated by UHV treatment, on the chemical, optical and electronic properties of ZnO thin film

Cited by 24 publications

References 79 publications

A Comparative Study of Un-Doped ZnO and in Doping ZnO Thin Films with Various Concentrations, Subjected to Appropriate UHV Treatment and Characterized by Sensitive Spectroscopy Techniques XPS, AES, Reels and PL

A Comparative Study of Un-Doped ZnO and in Doping ZnO Thin Films with Various Concentrations, Subjected to Appropriate UHV Treatment and Characterized by Sensitive Spectroscopy Techniques XPS, AES, Reels and PL

Device-Physics Realization of ZnO–MWCNT Nanostructure-Based Field-Effect Biosensor for Ultrasensitive Simultaneous Genomic Detection of Foodborne Pathogens

pH Controlled Nanostructure and Optical Properties of ZnO and Al-Doped ZnO Nanorod Arrays Grown by Microwave-Assisted Hydrothermal Method

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