Abstract
A theoretical study of a polysilicon solar cell with a radial junction in static regime under monochromatic illumination is presented in this paper. The junction radial solar cell geometry is illustrated and described. The carriers’ diffusion equation is established and solved under quasi-neutral base assumption with boundaries conditions and Bessel equations. New analytical expressions of electrons and holes density and photocurrent are found. The wavelength and structural parameters (base radius, emitter thickness) influences on charge carriers density and photocurrent are shown and examined.
Highlights
HolesDensity, Photocurrent, Radial JunctionSolar energy is an inexhaustible energy source
The aim of this study is to investigate on charge carriers’ density and photocurrent density respectively in the base and in the emitter of a radial junction polycrystalline solar cell
We observe that the electrons density and base radius of solar cell vary in the same order
Summary
Solar energy is an inexhaustible energy source. Solar cell technology has been pioneered in space industry, essentially because solar energy is one of the main power sources for satellites. Space environment is a very harsh environment for electronic devices, such as silicon solar cells and other semiconductor based detectors. We can obtain energy by converting the solar energy in electrical energy with the semiconductor optoelectronic device, such as the vertical junction solar cell or planar junction [1]. Since study conducted on cubic or cylindrical solar cell [2] showed a slight improvement in solar cell parameters in favor of a cylindrical model, notably the radial junction solar cell [3]. The aim of this study is to investigate on charge carriers’ density and photocurrent density respectively in the base and in the emitter of a radial junction polycrystalline solar cell
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