scholarly journals Some Preliminary Results of the Synthesis and Investigation of the Glass/FTO/Si/Au/ Embedded Thin Film for Application in the Modified Plasmonic Solar Cell

2021 ◽  
Vol 37 (1) ◽  
Author(s):  
Nguyen Tien Thanh ◽  
Dao Tien Thanh ◽  
Nguyen Si Hieu ◽  
Nguyen Thi Mai Huong
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Surface Layer ◽  
Solar Cell ◽  
Optical Absorption ◽  
Thermal Annealing ◽  
Solar Cell Performance ◽  
Vis Spectroscopy ◽  
Amorphous Si

This paper outlines the synthesis of the glass/FTO/Au/ and of the glass/FTO/Si/Au/ nanoparticles embedded thin films and then outlines some obtained experiment results concerning their properties of surface morphology, structure, chemical composition and optical absorption in comparison. Based on the measured results of SEM, EDX, XRD and UV-VIS spectroscopy we observed that the structure of the sputtered Si layer is amorphous phase meanwhile the structure of the sputtered Au layer is crystallized phase. Depending on the sputtered layers (Si, Au) thicknesses and technological conditions the different surfaces morphologies of the Au flat surface layer or the Au bumpy surface layer with different sizes of nanoparticles /clusters are formed on both the samples surfaces of FTO and amorphous Si layers. Notably, the optical absorption spectra of glass/FTO/Si/Au thin film in both cases of thermal annealing and without thermal annealing are significantly enhanced and shifted to blue- and red regions, these results can be explained by the role of the amorphous Si layer, as well as the Si/Au Schottky layers/nanoparticles barrier configurations caused. The glass/FTO/Si/Au layer/nanoparticles thin films could be used for integration with the core structure (Au/TiO2) of plasmonic solar cell for aiming to  enhance the solar cell performance.

New tailored organic semiconductors thin films for optoelectronic applications

2021 ◽  
Author(s):  
Dinesh Pathak ◽  
Sanjay Kumar ◽  
Sonali Andotra ◽  
Jibin Thomas ◽  
Navneet Kaur ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Solar Cell ◽  
Optical Absorption ◽  
Band Gap ◽  
Organic Semiconductors ◽  
Low Cost ◽  
Organic Thin Film ◽  
Vis Spectroscopy ◽  
Carbon Based

In this study, we have investigated new tailored organic semiconductors materials for the optoelectronic application, such as organic solar cells. The carbon-based organic semiconductor material has promising advantages in organic thin-film form. Moreover, due to its low cost, organic thin-films are suitable and cheaper than inorganic thin-film. The band gap of organic semiconductors materials can be tuned and mostly lies between 2.0eV to 4eV and the optical absorption edge of organic semiconductors typically lies in between 1.7eV to 3eV. They can be easily tailored by modifying the carbon chain and legends and looks promising for engineering the band gap to harness solar spectrum. In this work, with new tailored organic semiconductors the solution route is explored which is low cost processing method. (Anthracen-9-yl) methylene naphthalene-1-amine, 4-(anthracen-9-ylmethyleneamino)-1,5dimethyl-2-phenyl-1H-pyrazol-3-one and N-(anthracen-9-ylmethyl)-3,4-dimethoxyaniline thin-films are processed by spin coating method with changing concentration such as 0.05 wt% and 0.08 wt%. Thin films of Organic semiconductors were prepared on glass substrate and annealed at 55°C. The structural and optical behaviour of (Anthracen-9-yl) methylene naphthalene-1-amine, 4-(anthracen-9-ylmethyleneamino)-1,5dimethyl-2-phenyl-1H-pyrazol-3-one and N-(anthracen-9-ylmethyl)-3,4-dimethoxyaniline organic semiconductors thin films is studied by X-ray diffraction (XRD), Scanning electron microscopy (SEM) and UV-Visible Spectroscopy technique. The XRD data of synthesized sample suggests the Nano crystallinity of the Organic layers. The SEM micrographs shows the dense packing when we increase the wt% 0.05 to 0.08. Analysis of the optical absorption measurements found that the engineered band gap of synthesized thin films are 2.18eV, 2.35eV, 2.36eV, 2.52eV and 2.65eV which suggest suitability for applications of Optoelectronic devices such as solar cell. Such light weight, eco-friendly and disposable new carbon based materials seems to have potential to replace other traditional hazardous heavy materials for future eco-friendly flat fast electronics. Keywords: Thin-film, solar cell, tailored organic semiconductors, XRD, SEM, UV-Vis spectroscopy.

Modification of Thin Film Surface Morphology by Thermal Annealing Process to Enhance Organic Photovoltaic Solar Cell Performance

2014 ◽  
Vol 879 ◽  
pp. 144-148
Author(s):  
Nurul Huda Yusoff ◽  
Nur Izzah Abd Azes ◽  
Surani Buniran
Keyword(s):  
Thin Film ◽  
Solar Cell ◽  
Thermal Annealing ◽  
Film Surface ◽  
Annealing Process ◽  
Organic Photovoltaic ◽  
Solar Cell Performance ◽  
Photovoltaic Solar Cell ◽  
Thin Film Surface ◽  
Thermal Annealing Process

This paper reports effect of modification thin film surface morphology using thermal annealing process in order to enhance organic photovoltaic solar cell performance. The organic photovoltaic solar cell (OPV) were fabricated using bulk heterojunction structure, consist of p-type semiconductor of polythiophene (PT) derivative and an n-type of fullerene, C-61 derivative. The devices structure can be named as Al/LiF/polymer composite film/PEDOT-PSS/ITO. For comparison, the devices were varies; as cast and annealed at 125°C for half an hour to modify the thin film surface structure. The performances of the devices were studied by observing the current-voltage characteristics of the device in dark at ambient temperature and under standard A.M 1.5 illumination. The light conversion efficiency of the resulting photovoltaic devices increases from 0.04% (as cast) to 2.3% after thermal annealing process. As a result, the annealed organic photovoltaic devices, show enhanced efficiencies compared with as cast device due to the enhancement in transport properties of polymer base photovoltaic device.

scholarly journals Using a Neural Network to Improve the Optical Absorption in Halide Perovskite Layers Containing Core-Shells Silver Nanoparticles

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 437 ◽  
Author(s):  
Michael Nelson ◽  
Marcel Di Vece
Keyword(s):  
Neural Network ◽  
Thin Film ◽  
Solar Cell ◽  
Optical Absorption ◽  
Metallic Nanoparticles ◽  
Special Property ◽  
Solar Cell Performance ◽  
Plasmon Resonances ◽  
Halide Perovskite ◽  
Difference Time

Core-shells metallic nanoparticles have the advantage of possessing two plasmon resonances, one in the visible and one in the infrared part of the spectrum. This special property is used in this work to enhance the efficiency of thin film solar cells by improving the optical absorption at both wavelength ranges simultaneously by using a neural network. Although many thin-film solar cell compositions can benefit from such a design, in this work, different silver core-shell configurations were explored inside a Halide Perovskite (CH3NH3PbI3) thin film. Because the number of potential configurations is infinite, only a limited number of finite difference time domain (FDTD) simulations were performed. A neural network was then trained with the simulation results to find the core-shells configurations with optimal optical absorption across different wavelength ranges. This demonstrates that core-shells nanoparticles can make an important contribution to improving solar cell performance and that neural networks can be used to find optimal results in such nanophotonic systems.

Optical and electrical properties of solution processable TiOx thin films for solar cell and sensor applications

2011 ◽  
Vol 1352 ◽  
Author(s):  
Jiguang Li ◽  
Lin Pu ◽  
Mool C. Gupta
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Resistivity ◽  
Refractive Index ◽  
Solar Cells ◽  
Solar Cell ◽  
Electrical Properties ◽  
Thermal Annealing ◽  
Electrical Resistance ◽  
Optical And Electrical Properties

ABSTRACTRecently, few tens of nanometer thin films of TiOx have been intensively studied in applications for organic solar cells as optical spacers, environmental protection and hole blocking. In this paper we provide initial measurements of optical and electrical properties of TiOx thin films and it’s applications in solar cell and sensor devices. The TiOx material was made through hydrolysis of the precursor synthesized from titanium isopropoxide, 2-methoxyethanol, and ethanolamine. The TiOx thin films of thickness between 20 nm to 120 nm were obtained by spin coating process. The refractive index of TiOx thin films were measured using an ellipsometric technique and an optical reflection method. At room temperature, the refractive index of TiOx thin film was found to be 1.77 at a wavelength of 600 nm. The variation of refractive index under various thermal annealing conditions was also studied. The increase in refractive index with high temperature thermal annealing process was observed, allowing the opportunity to obtain refractive index values between 1.77 and 2.57 at a wavelength 600 nm. The refractive index variation is due to the TiOx phase and density changes under thermal annealing.The electrical resistance was measured by depositing a thin film of TiOx between ITO and Al electrode. The electrical resistivity of TiOx thin film was found to be 1.7×107 Ω.cm as measured by vertical transmission line method. We have also studied the variation of electrical resistivity with temperature. The temperature coefficient of electrical resistance for 60 nm TiOx thin film was demonstrated as - 6×10-3/°C. A linear temperature dependence of resistivity between the temperature values of 20 – 100 °C was observed.The TiOx thin films have been demonstrated as a low cost solution processable antireflection layer for Si solar cells. The results indicate that the TiOx layer can reduce the surface reflection of the silicon as low as commonly used vacuum deposited Si3N4 thin films.

Effect of Surface Morphology on the Performance of Natural Dye Sensitized TiO2 Thin Film Solar Cell

2013 ◽  
Vol 678 ◽  
pp. 326-330 ◽  
Author(s):  
Thottipalayam Subramaniyan Senthil ◽  
Natarajan Muthukumarasamy ◽  
Santhanam Agilan ◽  
Rangasamy Balasundaraprabhu ◽  
Chinna Kannaiyan Senthil Kumaran
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Solar Cell ◽  
Thin Film Solar Cell ◽  
Natural Dye ◽  
Natural Dyes ◽  
Tio2 Thin Films ◽  
Dye Sensitized ◽  
Eugenia Jambolana ◽  
Vis Spectroscopy

Nanocrystalline and flower like structured TiO2 thin films are prepared by sol-gel spin coating method. The prepared films are annealed at 450°C. Natural dyes are prepared from delonix regia flower and eugenia Jambolana fruit. The prepared natural dyes were sensitized into both nanocrystalline and flower like structured TiO2 thin films. The prepared solar cell was characterized by SEM, Uv-Vis spectroscopy and J-V characteristics. Conversion of solar light into electricity was successfully accomplished with both natural dye based solar cells. The best solar energy conversion efficiency (ƞ= 0.2%) was obtained for eugenia Jambolana dye sensitized flower like structured TiO2 thin film solar cell.

Influence of Defect Post-deposition Treatments on poly-Si Thin-film Solar Cells on Glass grown by ECRCVD

2006 ◽  
Vol 910 ◽  
Author(s):  
Björn Rau ◽  
Jens Schneider ◽  
Erhard Conrad ◽  
Stefan Gall
Keyword(s):  
Thin Film ◽  
Solar Cell ◽  
Thermal Annealing ◽  
Electron Cyclotron Resonance ◽  
High Potential ◽  
Structural Quality ◽  
Solar Cell Performance ◽  
The Impact ◽  
Post Deposition ◽  
Si Thin Film

AbstractThe epitaxial thickening of a thin polycrystalline Si (poly-Si) film (seed layer) is a promising approach to realize an absorber layer of a poly-Si thin-film solar cell on glass. Such cell concept combines the benefits of crystalline Si and the high potential for cost reduction of a thin-film technology. Here, we discuss the influence of post-deposition treatments on the properties of absorber layers grown by electron-cyclotron resonance chemical vapor deposition (ECRCVD) and the solar cell performance, respectively. After the absorber growth and prior to the emitter deposition, defect annealing was used to improve the structural quality of the absorber layers and to increase the doping efficiency. For this, we used rapid thermal annealing (RTA) processes as well as thermal annealing in a conventional quartz furnace. In order to avoid damaging of the glass, only short annealing times (up to 400 s) were applied at temperatures of up to 950 °C. Defect passivation treatments were carried out at temperatures of about 350 °C to passivate the remaining defects in the films by hydrogen. The impact of both treatments on the solar cell parameter will be discussed. Excellent VOC's of up to 361 mV were achieved without hydrogenation showing the high potential of ECRCVD-grown absorbers. Applying both treatments resulted so far in an increase of VOC of about 400 mV. Because of the fact, that both post-treatments (particularly hydrogenation) are still not yet optimized, further improvements can be expected.

Effect of rapid thermal annealing on sprayed Cu2SnS3 thin films for solar-cell application

2020 ◽  
Vol 59 (10) ◽  
pp. 105503
Author(s):  
Wafaa Magdy ◽  
Ayaka Kanai ◽  
F. A. Mahmoud ◽  
E. T. El Shenawy ◽  
S. A. Khairy ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cell ◽  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Solar Cell Application
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