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In this paper, we present the results of the calculations of optical losses in the solar cell layers based on n-ZnMgO / p-CuO(p-Cu2O) heterojunctions with AZO and ITO front contacts. The calculations were carried out considering of light absorption in the auxiliary layers of the device. Thus, the spectral dependencies of transmittance in the absorber layer of solar cell were defined. It is made possible...
A novel complex of ZnO nanocrystallite aggregates with superior light-scattering capability was synthesized via an eco-friendly aqueous solution method and investigated as a photoanode material for dye-sensitized solar cells (DSSCs). The nanocrystallite aggregate complex was produced by adding a suitable amount of glutamic acid into the reaction mixture as a shape modulating agent. In the absence...
This paper reports on deposition process of Zinc Oxide (ZnO) using a simple electrochemical approach. The ZnO thin film was deposited on the Aluminium (Al) substrate in an aqueous solution of Zinc Chloride (ZnCl2) at room temperature using two terminals electrochemical cell that consisted of positive and negative electrodes. Two types of Al substrate were used, which are Al foil and Al plate. Al foil...
For many years solar cells were totally inorganic and its design used to be simple. No matter how many junctions you could think about, at the end the interfaces were planar and the configurations followed a stratification of layers. And then, nanotechnology opened a wide variety of possibilities in which the architecture of the solar cells not only changed how solar cells architectures look like,...
We discuss the synthesis of zinc oxide (ZnO) and cadmium telluride (CdTe) quantum dots (QDs), the characterization of their optical properties on their own as well as combined, and their influence on the power conversion efficiency of photovoltaic structures when the QD blends were dispersed in a polymeric solution and deployed on the window surface of polycrystalline Si solar cells as down-shifting...
A simple novel and low cost efficient all ZnO based homojunction p-i-n solar cell without any top transparent conductive oxide layer and aback reflector layer are numerically modeled using 2D device simulation tool ATLAS. Optimization of the different layers, doping level and power conversion efficiency of the model has been done. The spectral response such as transmissivity, reflectance, and absorptance...
The paper presents a complex process used for obtaining ZnO nanostructures for antireflective coatings. The process is suitable to silicone solar cells and can be used in order to increase their efficiency under low solar radiation, allowing the control of the morphological and optical properties of ZnO nanostructures deposited on glass through ZnO seed layer deposition process. During the research,...
Thinning down the active absorber layer is the current trend in solar cell technology. The thinner absorber layer has two main advantages (i) it reduces the material consumption and (ii) minimizes the time and energy required in production. For thin film silicon (Si) technology, thinning down the absorber layer is of particular interest since the device throughputs of vacuum deposition systems as...
The interfaces in multilayer inverted polymer solar cells based P3HT / PCBM bulk heterojunction were prepared and studied on a flexible polyethylene naphthalate (PEN) substrate. The annealing effect on each interface of the PEN/ITO/ZnO multilayer and also ZnO/P3HT:PCBM on the structural, photophysical and photovoltaic properties was investigated and scrutinized directly on OPV device using the tomographic...
The present study reports on the structural, morphological, optical and electrical properties of Zn1−xVxO (0 ≥ x ≥ 0.30) thin films. These films of ∼ 200 to 240 nm thickness with low and high vanadium loading, were grown by rf-magnetron sputtering on Si (100) and glass substrates at room temperature (RT) and 200 °C, respectively, using Zn1−xVxO nanopowder like targets. In regard to this, it should...
This paper exhibits a numerical analysis of ultra thin film Cu(In, Ga)Se2 (CIGS) solar cell which has been performed by using SCAPS-1D simulator. In this paper, the performances of CIGS solar cell is observed by varying absorber layer, buffer layer and window layer thickness. Also the effect of temperature has been carried out. The aim of this work is optimization of CIGS solar cell thickness as well...
This work explores the opportunity of the use of graphene as the transparent conducting (TC) layer instead of conventional transparent conducting oxide (TCO) such as indium tin oxide (ITO) in the CZTS based solar cells which is recently evolved as one of the most promising thin film solar cells. It has been known that graphene has higher transmittance and conductance and is cheaper than the widely...
In our paper work simulation study and analysis of n-ZnO/p-Si heterojunction photo detector are reported. In this project work we can use a program in AFROS-HET (Automat for simulation of hetero-structures) simulator and study of important quality parameters, their impacts and variation. AFROS-HET consists of one dimensional numerical program for model of multi layer homo or heterojunction solar cells...
In this paper, we used sol-gel derived ZnO solution of different molar ratio of ethanolamine with low temperature process deposited on ITO substrate as the electron transport layer (ETL) in inverted polymer solar cells (IPSCs). We found through a detailed analysis of less ethanolamine and low-temperature process ZnO thin film, which gives both high transparency and comparative literature has a simple...
The gallium doped ZnO films were prepared and characterized to be used as transparent and conductive substrates replacing commercial ITO substrate applying for dye-sensitized solar cell. The thickness effects on electrical, optical and structural properties of gallium-doped ZnO films were investigated. It was found that the lowest resistivity of 3.96×10−4 Q•cm and the highest hall mobility of 14.12...
ZnO and indium-doped ZnO structures were prepared by hydrothermal method deposited for different time duration. Scanning electron microscopy (SEM) measurements show that flower-like crystals form during the synthesis. X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS) measurements confirm the incorporation of the dopant ion into the crystalline lattice of ZnO. The effects of indium...
Thin films of ZnO were deposited on cleaned soda lime glass substrates by using RF magnetron sputtering technique for deposition time of 20mins, 40mins, 60mins, 80mins and 100mins at room temperature. The structural and electrical properties of ZnO thin films were obtained from X-ray diffraction (XRD), Atomic force microscopy (AFM) and Hall Effect measurement. XRD results confirm the presence of (002)...
This paper reviews the three main thin film solar cell technologies: amorphous silicon (α-Si), copper indium gallium selenide (CIGS), and cadmium telluride (CdTe). The evolution of these three technologies is discussed in comparison to commercial applications, reliability, and market share. While the α-Si cell is almost extinct in terrestrial applications, CIGS and CdTe are comparable to multicrystalline...
In recent years global consumption of fossil fuels as the main sources of energy, has created dangerous conditions for environment and wild life. On the other hand, their limited amount of availability and risk of depletion is getting a sensible problem day by day. Hence there have been several efforts in researches to propose alternative solutions for generating electrical energy. One example is...
A solar cell is an electrical device that converts light energy into electricity. One of the crucial parts of realizing high-performance thin-film-based solar cells is an n-type buffer layer. Instead of the widely used, but toxic CdS buffer layer, we investigated the possibility of using Zn(O,S) as an alternative material grown by atomic layer deposition (ALD). First of all, structural, electrical,...
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