Non-thermal plasma effects on structural and optical properties of Cd doped ZnO thin films

Mishjil, Khudheir A.; Abdulsada, Ali H; Rashid, Hayfa G.; Mansour, Hazim Louis; Rasheed, Hiba S.; Murbat, Hamid H.; Habubi, Nadir F.

doi:10.1088/1757-899x/871/1/012061

Cited by 4 publications

(1 citation statement)

References 33 publications

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“…According to SEM images, the particle size varies from 20 to 35 nm with spherical morphology and uniform distribution of the particles. Furthermore, as the Cd concentrations in ZnO increase, the particle size increases due to increased grain growth [46].…”

Section: Morphological Analysismentioning

confidence: 99%

Structural, impedance, dielectric and optical characteristics of Cd- substituted Zn_(1−x)Cd_xO nanoparticles at low temperatures

Ahmad¹,

Maqsood²

2021

Phys. Scr.

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Nanocrystalline Cd substituted ZnO nanoparticles with common formula Zn (1-x) CdxO (x = 0%, 3%, 6%, and 10%) were fabricated by a co-precipitation technique. X-ray diffraction (XRD) and scanning electron microscopy (SEM) was used to investigate the microstructures and morphology of synthesized nanoparticles at room temperature. The outcome of the x-ray diffraction (XRD) study supports the existence of wurtzite crystal structure for ZnO, and Cd substituted ZnO samples conformed that substituted Cd ions are catching up Zn site. The morphological assessments of the fabricated nanoparticles indicated that the nature of the nanoparticles is a slightly hexagonal and mostly spherical shape with size ranges 46-55 nm. The electric impedance of the samples was measured in a wide range of frequency 100Hz–2MHz at different temperatures (140 K-260 K) using an LCR meter. It was observed that the dielectric constants (ἐ), (ε´´), loss tangent (tanδ), and ac conductivity of pure and Cd substituted ZnO nanoparticles depended on frequency. The calculations of dielectric measurement showed that the parameters (ἐ), (ε´´), loss tangent (tanδ) decreased with the increase in frequency. But the ac conductivity enhanced with the frequency, whereas the values of the above parameters increased with the temperature rise. The dielectric parameters are also found to improve with the increase in Cd concentrations. The correlated barrier-hopping (CHB) model dominated in ac conductivity. The reduction in the bandgap was also observed with Cd concentration.

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Section: Morphological Analysismentioning

confidence: 99%

Structural, impedance, dielectric and optical characteristics of Cd- substituted Zn_(1−x)Cd_xO nanoparticles at low temperatures

Ahmad¹,

Maqsood²

2021

Phys. Scr.

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Assessment of the effect of surface functionalization of oxygen and argon microwave plasma on PVA films for optoelectronic devices

Elashry,

Elsaeed

2024

Phys. Scr.

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This study explores the enhancement of optical properties in polyvinyl alcohol (PVA) polymer using a low-pressure microwave plasma reactor, adapted from a microwave oven. The research focuses on the effects of oxygen and argon plasma treatments at a consistent power of 1000 W, a flow rate of 6 L/min, and a pressure of 16 mbar on PVA films. The optimal treatment times of 10 s and 15 s were identified as particularly effective in improving the optical characteristics of the PVA films, which were created using a solution casting method. The optical properties were analyzed using a UV-Vis spectrophotometer across a wavelength range of 200-900 nm. The absorption spectrum revealed a significant absorption peak at around 210 nm (photon energy = 5.8 eV) for all plasma-treated PVA films, with a subsequent decrease in absorbance. Notably, the transmittance for the PVA-oxygen treated film at 10 s reached a maximum of 90.36% beyond 360 nm, attributed to increased hydrophilicity from the oxygen content. Similar trends were observed in the extinction coefficient (k) and optical conductivity (σopt). The optical energy band gap, calculated using the Tauc relation for both direct and indirect allowed transitions, decreased from 5.32 eV and 4.80 eV to 4.82 eV and 4.35 eV with longer exposure times. The study also noted that skin depth diminishes as the incident energy photon value increases, indicating that penetration becomes more challenging at higher frequencies. The PVA-oxygen plasma treated film, after a 10 s exposure, has improved optical properties, making it suitable for various electronic industries.

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The Effect of Non-Thermal Plasma on the Topographical and Optical Constants of Cd Doped ZnO Thin Films

Mishjil

Abdulsada

Rashid

et al. 2021

J. Phys.: Conf. Ser.

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Nanostructured ZnO and Cd doped ZnO were deposited employing spray pyrolysis technique. Atomic force microscope and double beam spectrophotometer were utilized to study the influence of non-thermal plasma on topographical and some optical constants. AFM results indicate that the average diameter was 43.4-68.81 nm before exposure and their values was slightly influenced by exposure to plasma to be 42.74-69.25 nm and all the result indicate the deposited films have a nanostructure. Surface roughness Ra and root mean square roughness Rrms were in the ambit of (2.09-5.3 nm), (2.43-6.12 nm) before exposure to plasma, while their values were in the ambit of (2.09-5.3 nm),(2.58-10.3 nm) after the influence of plasma. Optical constants such as absorbance was increased with the increment of Cd content, the same trend was noticed after exposure to non thermal plasma. High absorbance was seen near 400 nm. Whereas extinction coefficient,refractive index show a decrement with the increment of Cd content before and after exposure to plasma. Reflectance also offers the same trend of the above optical constants, a comparatively low reflectance is shown for the pure ZnO thin films before and after exposure Finally, all the studied parameters were influenced by plasma exposure.

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Non-thermal plasma effects on structural and optical properties of Cd doped ZnO thin films

Cited by 4 publications

References 33 publications

Structural, impedance, dielectric and optical characteristics of Cd- substituted Zn_(1−x)Cd_xO nanoparticles at low temperatures

Structural, impedance, dielectric and optical characteristics of Cd- substituted Zn_(1−x)Cd_xO nanoparticles at low temperatures

Assessment of the effect of surface functionalization of oxygen and argon microwave plasma on PVA films for optoelectronic devices

The Effect of Non-Thermal Plasma on the Topographical and Optical Constants of Cd Doped ZnO Thin Films

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Non-thermal plasma effects on structural and optical properties of Cd doped ZnO thin films

Cited by 4 publications

References 33 publications

Structural, impedance, dielectric and optical characteristics of Cd- substituted Zn(1−x)CdxO nanoparticles at low temperatures

Structural, impedance, dielectric and optical characteristics of Cd- substituted Zn(1−x)CdxO nanoparticles at low temperatures

Assessment of the effect of surface functionalization of oxygen and argon microwave plasma on PVA films for optoelectronic devices

The Effect of Non-Thermal Plasma on the Topographical and Optical Constants of Cd Doped ZnO Thin Films

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Structural, impedance, dielectric and optical characteristics of Cd- substituted Zn_(1−x)Cd_xO nanoparticles at low temperatures

Structural, impedance, dielectric and optical characteristics of Cd- substituted Zn_(1−x)Cd_xO nanoparticles at low temperatures