295 research outputs found

    Effect of Thickness Variation of the N-Type Layer in CdS/CdTe Solar Cell

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    In this paper, we have prepared thin films by thermal evaporation on an ITO coated glass substrate. The thin film of an n-type material of CdS, having thickness as100, 150 and 200 nm, and also deposited CdTe film having a thickness 1μm over these films. We used the Silver paste to generate front and back contact for solar cell characterization. To increase the efficiency of solar cells the CdCl2 treatment has done with heat treatment using the furnace at 4000 C for 30 minutes for crystalline the structure. The UV-VIS-NIR spectrometer had used to study the optical absorption between 300-1100 nm, its transmission graph shows that the solar cell absorbed wavelength below 800nm. To study the I-V characteristics of solar cells we have used Keithley constant current supply, the result showed that the efficiency of solar cell increase 6.42, 7.07 and 9.10% with increasing thickness of an n-type layer of CdS (100,150 and 200nm respectively) and the SEM was described surface morphology of thin films

    Fixed point sets and orbit spaces of wedge of three spheres

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    Let XX be a finite CW-complex having mod pp cohomology isomorphic to a wedge of three spheres SnSmSl, 1nml\mathbb{S}^n\vee \mathbb{S}^m \vee \mathbb{S}^l,~ 1\leq n \leq m \leq l. The aim of this paper is to determine the fixed point sets of actions of the cyclic group of prime order on X.X. We also classify the orbit spaces of free actions of G=Zp,pG=\mathbb{Z}_p, p a prime or G=Sd, d=1,3,G=\mathbb{S}^d,~d=1,3, on XX and derive the Borsuk-Ulam type results

    Orbit spaces of free involutions on the product of three spheres

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    In this paper, we have determined the orbit spaces of free involutions on a finitistic space having mod 2 cohomology of the product of three spheres Sn×Sm×Sl,1nml\mathbb{S}^n\times \mathbb{S}^m \times \mathbb{S}^l, 1 \leq n \leq m \leq l. This paper generalizes the results proved by Dotzel et al. [6] for free involutions on the product of two sphere $\mathbb{S}^n \times \mathbb{S}^m,1\leq n\leq m.

    Involution on the product of projective space and sphere

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    Let G=Z2G=\mathbb{Z}_2 act on a finite CW-complex XX having mod 2 cohomology isomorphic to the product of projective space and sphere FPn×Sm,\mathbb{F}P^n\times \mathbb{S}^m, where F=R\mathbb{F}=\mathbb{R} or C.\mathbb{C}. In this paper, we have determined the connected fixed point sets and the orbit spaces of free involutions on X.X. As an application, we derive the Borsuk-Ulam type results
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