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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%.
Superconductivity is one of the most important phenomena in solid state physics. Its theoretical framework at low critical temperature Tc is based on Bardeen, Cooper and Schrieffer theory (BCS). But at high Tc above 135, this theory suffers from some setbacks. It cannot explain how the resistivity abruptly drops to zero below Tc , besides the explanation of the so called pseudo gap, isotope and pressure effect, in addition to the phase transition from insulating to super-conductivity state. The models proposed to cure this drawback are mainly based on Hubbard model which has a mathematical complex framework. In this work a model based on quantum mechanics besides generalized special relativity and plasma physics. It is utilized to get new modified Schr?dinger equation sensitive to temperature. An expression for quantum resistance is also obtained which shows existence of critical temperature beyond which the resistance drops to zero. It gives an expression which shows the relation between the energy gap and Tc . These expressions are mathematically simple and are in conformity with experimental results.
The speed of Neutrino
particles is shown to be greater than that of light as shown by the OPERA
neutrino experiment at the underground Gran Sasso Laboratory. The result of
this experiment can be explained within the framework of the Generalized
Special Relativity and Savickas model.
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.