scholarly journals Correlation between structural parameters and the magnetocaloric effect in epitaxial La0.8Ca0.2MnO3/LaAlO3 thin film

2013 ◽  
Vol 113 (6) ◽  
pp. 063508 ◽  
Author(s):  
J. C. Debnath ◽  
J. H. Kim ◽  
Y. Heo ◽  
A. M. Strydom ◽  
S. X. Dou
Keyword(s):  
Thin Film ◽  
Magnetocaloric Effect ◽  
Structural Parameters

scholarly journals Plasmon-Enhanced Sunlight Harvesting in Thin-Film Solar Cell by Randomly Distributed Nanoparticle Array

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1380
Author(s):  
Marwa M. Tharwat ◽  
Ashwag Almalki ◽  
Amr M. Mahros
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Solar Cell ◽  
Near Infrared ◽  
Structural Parameters ◽  
Visible Region ◽  
Nanoparticle Array ◽  
Solar Energy Harvesting ◽  
Infra Red ◽  
Crucial Parameter

In this paper, a randomly distributed plasmonic aluminum nanoparticle array is introduced on the top surface of conventional GaAs thin-film solar cells to improve sunlight harvesting. The performance of such photovoltaic structures is determined through monitoring the modification of its absorbance due to changing its structural parameters. A single Al nanoparticle array is integrated over the antireflective layer to boost the absorption spectra in both visible and near-infra-red regimes. Furthermore, the planar density of the plasmonic layer is presented as a crucial parameter in studying and investigating the performance of the solar cells. Then, we have introduced a double Al nanoparticle array as an imperfection from the regular uniform single array as it has different size particles and various spatial distributions. The comparison of performances was established using the enhancement percentage in the absorption. The findings illustrate that the structural parameters of the reported solar cell, especially the planar density of the plasmonic layer, have significant impacts on tuning solar energy harvesting. Additionally, increasing the plasmonic planar density enhances the absorption in the visible region. On the other hand, the absorption in the near-infrared regime becomes worse, and vice versa.

The Magnetocaloric Effect in the Thin Film of a Prussian Blue Analogue

2017 ◽  
Vol 2017 (41) ◽  
pp. 4817-4822
Author(s):  
Magdalena Fitta ◽  
Michał Szuwarzyński ◽  
Paweł Czaja ◽  
Gabriela Lewińska ◽  
Maria Bałanda
Keyword(s):  
Thin Film ◽  
Prussian Blue ◽  
Magnetocaloric Effect ◽  
Prussian Blue Analogue

scholarly journals Plexciton Modes Guided by an Exciton Slab in a Columnar Thin Film

2021 ◽  
Author(s):  
Mona Rostami ◽  
Ferydon Babaei
Keyword(s):  
Thin Film ◽  
Surface Plasmon ◽  
Structural Parameters ◽  
Exciton Coupling ◽  
Time Period ◽  
Surface Optical ◽  
Optical Modes ◽  
Splitting Energy ◽  
Columnar Thin Film ◽  
Plasmon Polaritons

Abstract In this study, we reported plasmon-exciton coupling for excitation the surface plexciton in columnar thin film with a central exciton slab using the transfer matrix method in Kretschmann configuration. The optical absorption spectra for surface plasmon polariton, surface exciton and surface plexciton was investigated at different structural parameters in proposed structure. The characteristics of surface optical modes were analyzed and there was an anticrossing behavior between polariton branches of plexciton spectra. Localization of surface modes on interfaces and hybridization between plasmons and excitons at both interfaces of exciton slab were proved by the time-averaged Poynting vector. We found that the types of coupling regimes between plasmons and excitons from weak to strong could be achieved. We found a high Rabi splitting energy 840 meV corresponding to the time period 5 fs which includes to the fast energy transfer between surface plasmon polaritons and surface excitons.

scholarly journals CuInSe2 nanotube arrays for efficient solar energy conversion

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Wipula Priya Rasika Liyanage ◽  
Manashi Nath
Keyword(s):  
Thin Film ◽  
Structural Parameters ◽  
Light Trapping ◽  
Functional Materials ◽  
Design Parameters ◽  
Nanotube Arrays ◽  
Photoconversion Efficiency ◽  
Liquid Junction ◽  
Versatile Technique ◽  
Electrode Coverage

AbstractHighly uniform and vertically aligned p-type CuInSe2 (CISe) nanotube arrays were fabricated through a unique protocol, incorporating confined electrodeposition on lithographically patterned nanoelectrodes. This protocol can be readily adapted to fabricate nanotube arrays of other photoabsorber and functional materials with precisely controllable design parameters. Ternary CISe nanotube arrays were electrodeposited congruently from a single electrolytic bath and the resulting nanotube arrays were studied through powder X-ray diffraction as well as elemental analysis which revealed compositional purity. Detailed photoelectrochemical (PEC) characterizations in a liquid junction cell were also carried out to investigate the photoconversion efficiency. It was observed that the tubular geometry had a strong influence on the photocurrent response and a 29.9% improvement of the photoconversion efficiency was observed with the nanotube array compared to a thin film geometry fabricated by the same process. More interestingly such enhancement in photoconversion efficiency was obtained when the electrode coverage with the nanotube arrays as photoactive material was only a fraction (~10%) of that for the thin film device. Apart from enhancement in photoconversion efficiency, this versatile technique provides ample opportunities to study novel photovoltaic materials and device design architectures where structural parameters play a key role such as resonant light trapping.

scholarly journals Meander Thin-Film Biosensor Fabrication to Investigate the Influence of Structural Parameters on the Magneto-Impedance Effect

Sensors ◽  
2021 ◽  
Vol 21 (19) ◽  
pp. 6514
Author(s):  
Abkar Sayad ◽  
Shah Mukim Uddin ◽  
Jianxiong Chan ◽  
Efstratios Skafidas ◽  
Patrick Kwan
Keyword(s):  
Thin Film ◽  
Film Thickness ◽  
Structural Parameters ◽  
High Sensitivity ◽  
Size Ratio ◽  
Optimal Ratio ◽  
Highly Sensitive ◽  
Fabrication Parameters ◽  
Significant Attention

Thin-film magneto-impedance (MI) biosensors have attracted significant attention due to their high sensitivity and easy miniaturization. However, further improvement is required to detect weak biomagnetic signals. Here, we report a meander thin-film biosensor preparation to investigate the fabrication parameters influencing the MI effect. Specifically, we hypothesized that an optimal film thickness and sensing area size ratio could be achieved to obtain a maximum MI ratio. A meander multilayer MI biosensor based on a NiFe/Cu/NiFe thin-film was designed and fabricated into 3-, 6-, and 9-turn models with film thicknesses of 3 µm and 6 µm. The 9-turn biosensor resembled the largest sensing area, while the 3- and 6-turn biosensors were designed with identical sensing areas. The results indicated that the NiFe film thickness of 6 µm with a sensing area size of 14.4 mm2 resembling a 9-turn MI biosensor is the optimal ratio yielding the maximum MI ratio of 238%, which is 70% larger than the 3- and 6-turn structures. The 3- and 6-turn MI biosensors exhibited similar characteristics where the MI ratio peaked at a similar value. Our results suggest that the MI ratio can be increased by increasing the sensing area size and film thickness rather than the number of turns. We showed that an optimal film thickness to sensing area size ratio is required to obtain a high MI ratio. Our findings will be useful for designing highly sensitive MI biosensors capable of detecting low biomagnetic signals.

Dependences of Structural Parameters on the Characteristics of Poly-Si Thin-Film Transistors after Plasma Passivation

2003 ◽  
Vol 762 ◽  
Author(s):  
Cheng-Ming Yu ◽  
Tiao-Yuan Huang ◽  
Tan-Fu Lei ◽  
Horng-Chih Lin
Keyword(s):  
Thin Film ◽  
Plasma Treatment ◽  
Detailed Analysis ◽  
Thin Film Transistors ◽  
Structural Parameters ◽  
Subthreshold Swing ◽  
Device Performance ◽  
Short Channel ◽  
Plasma Passivation ◽  
Si Thin Film

AbstractThe effects of NH3 and H2 plasma passivation on the characteristics of poly-Si thin-film transistors with source/drain extensions induced by a bottom sub-gate were studied. Our results show that significant improvements in device performance can be obtained by both passivation methods. Moreover, NH3-plasma-treatment appears to be more effective in reducing the off-state leakage, subthreshold swing, compared to H2 plasma passivation. NH3 plasma treatment is also found to be more effective in reducing the anomalous subthrehold hump phenomenon observed in non-plasma-treated short-channel devices. Detailed analysis suggests that all these improvements can be explained by the more effective passivation of the traps distributed in both the front and back sides of the channel by NH3 plasma treatment.

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