Temperature Effect on Light Concentration Silicon Solar Cell’s Operating Point and Conversion Efficiency

• 作者: Dieudonné Joseph Bathiebo
• 来源期刊: 智能电网与可再生能源(英文)
• 学科: 经济
• 关键词: TEMPERATURE Electric Power Conversion Efficiency Light Concentration Maximum Power Point Junction Dynamic Velocity
• 年，卷（期）: 2020,（5）
• 页码范围: 61-72
• 页数: 12页
• 分类号: F41

摘要

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 (<i><span style='font-family:Verdana;'>CPV</span></i><span style='font-family:Verdana;'>). 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. </span><span style='font-family:''><span style='font-family:Verdana;'>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 (</span><i><span style='font-family:Verdana;'>MPP</span></i><span style='font-family:Verdana;'>) moves to the open circuit when the cell temperature increases.</span></span>