Optimized light absorption in Si wire array solar cells Hadiseh Alaeian1, Ashwin C Atre2 and Jennifer A Dionne2 1 Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA 2 Department of Materials Science, Stanford University, Stanford, CA 94305, USA E-mail: alaeian@stanford.edu and jdionne@stanford.edu Received 31 August 2011, accepted for publication … I am searching but appropriate answer was't found. Recently, it has been found that cadmium telluride (CdTe) is the most promising candidate for the active layer among thin-film solar cells due to its long-term stability and capability of photon absorption in visible and near infrared region. The monochromatic absorption coefficient of silicon, inducing the light penetration depth into the base of the solar cell, is used to determine the optimum thickness necessary for the production of a large photocurrent. V. Tudi. How to calculate absorption coefficient of perovskite solar cell? Advances in OptoElectronics (2007). The absorption-generation-diffusion and recombination (bulk and surface) phenomena are taken into account in the excess minority carrier continuity equation. Cell Efficiency Sensitivity to the Absorption Coefficients and the Thickness of intrinsic Absorber Layer . From Absorbance Vs energy plan or absorbance Vs wavelength plot. Keywords: Absorption factor; Crystalline silicon solar cells; Optical model 1. The optical absorption coefficient of crystalline silicon near the band edge is determined to values as low as 10 −7 cm −1 by sensitive photocurrent measurements on high efficiency silicon solar cells. Introduction A fraction A of the solar irradiance incident on an opaque photovoltaic (PV) solar cell is absorbed and converted into electricity and heat and the remaining fraction R is reflected and lost. Structure due to three‐ and four‐phonon assisted absorption processes is observed. Gaining insight in the factors determining the absorption factor A is important for two reasons. ć * N. Posavec * * Karlovac University of Applied Sciences /Department of Mechanical Engineering, Karlovac, Croatia vladimir.tudic@vuka.hr nikola.posavec.1@gmail.com. 10 Furthermore, it is a direct bandgap semiconductor with optical absorption coefficient of 10 5 cm −1 and they are also commercially available. Source: "High-Efficiency Crystalline Silicon Solar Cells." The optical absorption coefficient of silicon solar cell material grown by three low‐cost growth methods was measured in the wavelength interval 0.8≤λ≤1.0 μm, the wavelength region of interest in surface photovoltage measurements of the minority carrier diffusion length.

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