The Influences of Thickness on the Optical and Electrical Properties of Dual-Ion-Beam Sputtering-Deposited Molybdenum-Doped Zinc Oxide Layer

Kuo, Chin-Chiuan; Liu, Chi‐Chang; He, Shao-Chih; Chang, Jing-Tang; He, Ju-Liang

doi:10.1155/2011/140697

Cited by 12 publications

(9 citation statements)

References 20 publications

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“…The number of the layers also influenced the electrical conductivity; in all the cases, it was evident that the samples with only one layer (0.04 mm to 0.05 mm) displayed the largest value, followed by the second (0.06 mm to 0.08 mm) and third layers (0.08 to 0.11 mm). The increase in thickness of the sample has increased the resistivity, and this tendency was also reported in [26], where initially, the resistivity decreased with the increase in thickness of the film and after reaching a certain value of thickness, resistivity tends to rise again. In the present work, it is believed that the minimum film thickness obtained was already more than the optimized value, and hence resistivity increased with an increase in thickness, and electrical conductivity reduced.…”

Section: Electrical Conductivitysupporting

confidence: 59%

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Joule-Heating Effect of Thin Films with Carbon-Based Nanomaterials

et al. 2022

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Smart textiles have become a promising area of research for heating applications. Coatings with nanomaterials allow the introduction of different functionalities, enabling doped textiles to be used in sensing and heating applications. These coatings were made on a piece of woven cotton fabric through screen printing, with a different number of layers. To prepare the paste, nanomaterials such as graphene nanoplatelets (GNPs) and multiwall carbon nanotubes (CNTs) were added to a polyurethane-based polymeric resin, in various concentrations. The electrical conductivity of the obtained samples was measured and the heat-dissipating capabilities assessed. The results showed that coatings have induced electrical conductivity and heating capabilities. The highest electrical conductivity of (9.39 ± 1.28 × 10−1 S/m) and (9.02 ± 6.62 × 10−2 S/m) was observed for 12% (w/v) GNPs and 5% (w/v) (CNTs + GNPs), respectively. The sample with 5% (w/v) (CNTs + GNPs) and 12% (w/v) GNPs exhibited a Joule effect when a voltage of 12 V was applied for 5 min, and a maximum temperature of 42.7 °C and 40.4 °C were achieved, respectively. It can be concluded that higher concentrations of GNPs can be replaced by adding CNTs, still achieving nearly the same performance. These coated textiles can potentially find applications in the area of heating, sensing, and biomedical applications.

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Section: Electrical Conductivitysupporting

confidence: 59%

“…The resistivity decreases and conductivity increases with thickness. However, above a certain value of thickness, the carrier mobility decreases and the conductivity will be reduced [26].…”

Section: Film Thicknessmentioning

confidence: 99%

Joule-Heating Effect of Thin Films with Carbon-Based Nanomaterials

et al. 2022

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“…According to Kuo et al [11], the concentration of the supports increases with the thickness of the film, but then becomes constant when the thickness of the film is greater than 160 nm. Indeed, the 80 nm thick films have a more disordered structure and stacking defects which cause the low concentration of the carriers.…”

Section: Analysis Of J-v Curves For a Stack Ito/zno/cds/cuomentioning

confidence: 99%

Investigation of the Optical and Electrical Properties of ITO/ZnO/CdS/CuO:Co/Ag Structure for Solar Cell

Nkhaili

Narjis

Outzourhit

et al. 2020

Advances in Materials Science and Engineering

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In this work, a new structure ITO/n-ZnO/n-CdS/p-CuO:Co/Ag for solar cell was prepared on a glass/ITO substrate. The RF sputtering was used to deposit the window layer (n-ZnO) at different time periods in order to reach various thickness of this film. The n-CdS thin films were synthesized by sol-gel technique to reduce the energy bands. The buffer layer (p-CuO:Co) was sputtered at 200 W, under 30% of oxygen. Then, the electrode (Ag) with a thickness of 100 nm was deposited by thermal evaporation under a pressure of 10−5 mbar. The photovoltaic activity results obtained from this structure showed that the above method is more relevant to achieve such structure. The electrical properties of this structure were investigated using the current-voltage (I-V) and AC impedance complex measurements. The values of open circuit voltage (Voc), short-circuit current (Jsc), and fill factor (FF) are 0.46 V, 4.1 mA cm−2, and 30%, respectively. The analysis of complex impedance measurements was very useful to investigate the electrical behavior of n-ZnO/n-CdS and n-CdS/p-CuO:Co interfaces. The impedance data are presented in the Nyquist and Bode plots at different thicknesses of the n-ZnO films. An equivalent circuit was used to analyze and to fit the experimental data. The validity of these fitting results is further supported by the extrapolation and the deconvolution of both process of the diffusion and recombination processes at the n-ZnO/n-CdS and n-CdS/p-CuO:Co interfaces, respectively. Our finding could provide an efficient method for fabricating a new configuration for improving the efficiency of inorganic ZnO/CuO solar cells as well as a useful approach for the analysis of complex impedance measurements. Further works are in progress in order to better improve the conversion efficiency.

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“…Advances of thin film growth technology over the past two decades has led to oxide heterostructures synthesis by a variety of techniques, including sputter techniques and molecular beam epitaxial for use in electro-optical devices, space science, solar cell energy utilization etc., [1]- [4]. Engineers made a promising material stable enough for use in solar cells: simply changing to a perovskite surface removes barriers to its functionality [5], [6].…”

Section: Introductionmentioning

confidence: 99%

“…Knowledge of optical constants of a material such as optical band gap, refractive index and extinction coefficient is quite essential to examine material's potential opto-electronic applications [5]. Understanding and knowledge of these band gaps is of primary importance for awareness of the electrical resistivity and carrier mobility of semiconductors [6]. In addition, it is widely used in the production of photocells, exposure meters for photographic use, and in reprography [5] for reproducing and copying documents.…”

Section: Introductionmentioning

confidence: 99%

Impact of Thickness on the Optical Properties of Selenium Thin Films

Udachan¹,

Ayachit²,

Udachan

et al. 2021

IyU

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Objectives: The primary objective of this investigation is to make a systematic study on the impact of thickness on optical properties, such as energy gap, absorption coefficient, optical density etc., for selenium thin films. Understanding of the band gap energy and its influence on film thickness is of utmost importance in acquiring the intended electrical characterization of semiconducting films. Materials and methods: Ultra-purity selenium (99.99 %) was deposited on glass substrates. During deposition, the glass substrate with its holder were rotated with constant speed to have a smooth coating. Results and discussions: The XRD findings indicate that selenium is amorphous in nature. The optical band gap energy is found to be decreasing form (2.3 to 2eV) with the rise of film thickness in interval (200 to 1000 nm). The band gap energy obeys inverse square law with respect to thickness. Conclusion: We have properly grown thin films of Se below the De Broglie wavelength limit by thermal evaporation in vacuum. The optical density varies directly with film thickness. The absorption coefficients were in the interval (0.5 to 4) × 107m-1. The AFM results confirmed that the Se nano-size increases with the increase in thickness. Both the grain boundaries and sub-grain regions are clearly visible in the SEM micrographs

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The Influences of Thickness on the Optical and Electrical Properties of Dual-Ion-Beam Sputtering-Deposited Molybdenum-Doped Zinc Oxide Layer

Cited by 12 publications

References 20 publications

Joule-Heating Effect of Thin Films with Carbon-Based Nanomaterials

Joule-Heating Effect of Thin Films with Carbon-Based Nanomaterials

Investigation of the Optical and Electrical Properties of ITO/ZnO/CdS/CuO:Co/Ag Structure for Solar Cell

Impact of Thickness on the Optical Properties of Selenium Thin Films

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