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Theoretical Analysis of AlxGa1-xAs/GaAs Graded Band Gap Solar Cell
Author(s) -
Belal A. Alshekhli
Publication year - 2011
Publication title -
journal of al-nahrain university-science
Language(s) - English
Resource type - Journals
eISSN - 2519-0881
pISSN - 1814-5922
DOI - 10.22401/jnus.14.3.09
Subject(s) - solar cell , band gap , photovoltaic system , materials science , theory of solar cells , optoelectronics , energy conversion efficiency , x ray absorption spectroscopy , electric field , diffusion , solar cell efficiency , computational physics , optics , physics , absorption spectroscopy , thermodynamics , electrical engineering , engineering , quantum mechanics
The graded band gap AlxGa1-xAs/GaAs solar cell model has been proposed. This model consists of graded compositions material in the surface layer extending from y=0 to y=D, and uniform band gap from y=D to y=L. The model simulates the absorption, generation, current density, spectral response and the solar efficiency generated from the solar spectrum. These photovoltaic parameters have been calculated by a GRAD computer program. Electric field, mobility and diffusion length of holes gradient are assumed constant in the model to get an analytical solutions. The photovoltaic parameters, obtained from the model, are Jsc =33 mA/cm 2 , Voc= .91 V, FF= .87 and η= 31 %. The

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