TITLE:
Temperature Effect on Light Concentration Silicon Solar Cell’s Operating Point and Conversion Efficiency
AUTHORS:
Mahamadi Savadogo, Boubacar Soro, Ramatou Konate, Idrissa Sourabié, Martial Zoungrana, Issa Zerbo, Dieudonné Joseph Bathiebo
KEYWORDS:
Temperature, Electric Power, Conversion Efficiency, Light Concentration, Maximum Power Point, Junction Dynamic Velocity
JOURNAL NAME:
Smart Grid and Renewable Energy,
Vol.11 No.5,
May
28,
2020
ABSTRACT: It is well known that temperature acts negatively on practically all the
parameters of photovoltaic solar cells. Also, the solar cells which are
subjected to particularly very high temperatures are the light concentration
solar cells and are used in light concentration photovoltaic systems (CPV). In fact, the significant heating
of these solar cells is due to the concentration of the solar flux which
arrives on them. Light concentration solar cells appear as solar cells under
strong influences of heating and temperature. It is therefore necessary to take
into account temperature effect on light concentration solar cells performances
in order to obtain realistic results. This one-dimensional study
of a crystalline silicon solar cell under light concentration takes into
account electrons concentration gradient electric field in the determination of
the continuity equation of minority carriers in the base. To determine excess
minority carrier’s density, the effects of temperature on the diffusion and
mobility of electrons and holes, on the intrinsic concentration of electrons,
on carrier’s generation rate as well as on width of band gap have also been
taken into account. The results show that an increase of temperature improves
diffusion parameters and leads to an increase of the short-circuit photocurrent
density. However, an increase of temperature leads to a significant decrease in
open-circuit photovoltage, maximum electric power and conversion efficiency.
The results also show that the operating point and the maximum power point (MPP) moves to the open circuit when the
cell temperature increases.