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Search Results: 1 - 10 of 18604 matches for " Solar Cell "
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Temperature Effect on Capacitance of a Silicon Solar Cell under Constant White Biased Light  [PDF]
Ibrahima Diatta, Ibrahima Ly, Mamadou Wade, Marcel Sitor Diouf, Senghane Mbodji, Grégoire Sissoko
World Journal of Condensed Matter Physics (WJCMP) , 2016, DOI: 10.4236/wjcmp.2016.63024
Abstract: In static regime with polychromatic illumination, using the expression of the solar cell capacitance to determine the silicon solar cell capacitance C0(T) in short-circuit, is the purpose of this article. The expression of the excess minority carries density δ(x) from the continuity equation. The expression of δ(x) is used to determine the photovoltage expression. The capacitance efficiency dependence on Xcc(T) is studied. Xcc(T) is the abscissa of the maximum of δ(x).
Critical Factors that Affecting Efficiency of Solar Cells  [PDF]
Furkan Dincer, Mehmet Emin Meral
Smart Grid and Renewable Energy (SGRE) , 2010, DOI: 10.4236/sgre.2010.11007
Abstract: A solar cell or photovoltaic cell is a device which generates electricity directly from visible light. However, their efficiency is fairly low. So, the solar cell costs expensive according to other energy resources products. Several factors affect solar cell efficiency. This paper presents the most important factors that affecting efficiency of solar cells. These effects are cell temperature, MPPT (maximum power point tracking) and energy conversion efficiency. The changing of these factors improves solar cell efficiency for more reliable applications.
Theoretical Study of Gallium Phthalocyanine Dimer-Fullerene Complex for Photovoltaic Device  [PDF]
Akihiro Takeda, Takeo Oku, Atsushi Suzuki, Yasuhiro Yamasaki
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.29116
Abstract: Geometry and electronic structures of gallium phthalocyanine dimer and fullerene molecules were investigated by theoretical calculation. The highest occupied molecular orbital was localized on the donor site, and the lowest unoccupied molecular orbital were localized on accepter site. The present results indicate that high conversion efficiency would be expected when phthalocyanine dimers were used as solar cell materials.
Modelling, Simulation and Optimization of n-p-n-p Silicon Multilayer Solar Cells  [PDF]
Abdellatif Bouzidi, Ahmed S. Bouazzi, Mosbah Amlouk
Open Journal of Microphysics (OJM) , 2012, DOI: 10.4236/ojm.2012.23004
Abstract: We simulate the conception parameters of a model of a silicon multilayer solar cell. The cell is composed by four layers of opposite conductivities forming three junctions inside the cell. The electric contacts are tailored vertically to collect the minority carrier generated under illumination. We developed the equations giving the output power, the fill factor and the efficiency of the cell, taking into account the series resistances of each layer. We optimized, using MATLAB software, the thicknesses of the layers, the impurity concentration level and the distance between the electric contacts. We showed that the optimized photovoltaic structure, with the silicon properties published at the Ioffe institute website, gives an efficiency of 20.66%. The n-p-n-p silicon cell delivers a short circuit current Icc = 45.3 mA/cm2, an open circuit voltage V oc= 0.746 V and an output power of 28.5 mW/cm2. The corresponding fill factor is FF = 84.29%.
Impact of the light intensity variation on the performance of solar cell constructed from (Muscovite/TiO2/Dye/Al)  [PDF]
R. Abd Elgani, M. H. M. Hilo, M. D. Abd Allah, A. Al Hassan, R. Abd Elhai
Natural Science (NS) , 2013, DOI: 10.4236/ns.2013.510131

In this work, the influence of the light intensity as one of the parameters that control the solar cell is studied. The effect of the other main variables, such as temperature, rotation per Minuit of the spin coating instrument, and the samples concentration, was found to be in conformity with other results, but unfortunately the intensity of light does not increase the solar cell efficiency, and fill factor, by other words it was found to play only a secondary role.

Fabrication and Characterization of Poly[Decaphenylcyclopentasilane]-Based Solar Cells  [PDF]
Makoto Iwase, Takeo Oku, Atsushi Suzuki, Tsuyoshi Akiyama, Katsuhisa Tokumitsu, Masahiro Yamada, Mika Nakamura
Advances in Materials Physics and Chemistry (AMPC) , 2012, DOI: 10.4236/ampc.2012.23020
Abstract: Poly[decaphenylcyclopentasilane] (PDPS)-based photovoltaic cells were fabricated by using mixture solution of PDPS including boron and phosphorous elements. A doping effect of phosphorus and boron into PDPS was investigated on the performance of the photovoltaic devices. The solar cell provided short-circuit current density of 0.11 mA/cm2 and open-circuit voltage of 0.81 V under simulated sunlight. Microstructural analysis indicated that PDPS had an amor-phous structure, which would result in the photovoltaic properties.
Feasibility Study for a Solar-Energy Stand-Alone System: (S.E.S.A.S.)  [PDF]
Hussein Abdel-Aal, Mohamed Bassyouni, Maha Abdelkreem, Shereen Abdel-Hamid, Khaled Zohdy
Smart Grid and Renewable Energy (SGRE) , 2012, DOI: 10.4236/sgre.2012.33028
Abstract: The present study is aimed to serve a small community living on Stand-Alone Solar-Energy (S.A.S.E.S) system. As a basis for the study 1 cubic meter of hydrogen is to be produced by electrolysis in 5 hrs that requires energy input of 5 KW-hr. The proposed system consists of the following main components: photovoltaic module, water electrolyzer and fuel cell. Solar hydrogen production by water electrolysis is described and design parameters are specified. Economic feasibility of the proposed system is evaluated. The projected cost of hydrogen is calculated and found to be 5 cents/ft3.
Effect of doping concentration on the performance of solar cell constructed from (Muscovite/TiO2/Dye/Al)  [PDF]
R. Abd Elgani, M. H. M. HILO, A. Al Hassan, M. D. Abd Allah
Natural Science (NS) , 2013, DOI: 10.4236/ns.2013.51009

Solar cells were fabricated from (Muscovite/ TiO2/Dye/Al), the effect of temperature, concen- tration and light intensity on the electrical prop- erties of (Muscovite/TiO2/Dye/Al) was studied. The relationship between current and voltage was found to be algorism, which is in agreement with the ordinary relation for solar cells. When dye concentration was increased the conductivity, fill factor and efficiency were also increased. This result is found to be in conformity with the theoretical relations. The small energy gaps for their samples show that they are semiconductors. The maximum efficiency obtained is 33.2%.

Improved Photovoltaic Properties of Heterojunction Carbon Based Solar Cell  [PDF]
Sudip Adhikari, M. S. Kayastha, H. R. Aryal, S. Adhikary, T. Takeuchi, K. Murakami, Y. Kawashimo, H. Uchida, K. Wakita, M. Umeno, D. C. Ghimire
Journal of Surface Engineered Materials and Advanced Technology (JSEMAT) , 2013, DOI: 10.4236/jsemat.2013.33024

Amorphous carbon (a-C) thin films have been synthesized by microwave (MW) surface wave plasma (SWP) chemical vapor deposition (CVD) on n-type silicon and quartz substrates, aiming at the application of the films for photovoltaic solar cells. Argon, acetylene and trimethylboron were used as a carrier, source and dopant gases. Analytical methods such as X-ray photoelectron spectroscopy (XPS), Hall Effect measurement, JASCO V-570 UV/VIS/NIR spectroscopy, Raman spectroscopy, Transmission electron microscopy (TEM) and Solar simulator were employed to investigate chemical, optical, structural and electrical properties of the a-C films. Two types of solar cells of configuration p-C/n-Si and p-C/i-C/n-Si have been fabricated and their current-voltage characteristics under dark and illumination (AM 1.5, 100 mW/cm2) have been studied. The two solar cells showed rectifying curves under the dark condition confirming the heterojunction carbon based solar cell between p-C and n-Si. When illuminated by the solar simulator light the devices showed photovoltaic behavior. The heterojunction device (p-C/i-C/n-Si) having inserted intrinsic carbon film between p-C and n-Si exhibited significant enhancement of the conversation efficiency (0.167% to 2.349%) over the device (p-C/n-Si).

Fuzzy Adaptive P&O Control for MPPT of a Photovoltaic Module  [PDF]
Maynara A. Aredes, Bruno W. Fran?a, Maurício Aredes
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.24018
Abstract: In this work a Maximum Power Point Tracker (MPPT) for photovoltaic modules is developed using fuzzy logic. As it is well known, the output of the photovoltaic module is a non-linear curve which has a unique point of maximum power (MPP) for a given condition of radiation and temperature. When a load is connected to the module, only in very specifics cases, the operation point will coincide with the MPP, for any other conditions the system will not operate with maximum power. Thus MPPT circuits must guarantee that photovoltaic modules operate with its maximum power at most of the time, independently to the radiation and temperature conditions. In order to achieve this objective, in this paper the input variables of the controller are transformed into linguistic variables, which associate with a set of rules results the displacement of the operation point so as to transfer the maximum power from the photovoltaic module to the load.
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