Abstract
This paper presents a comparison of three-dimensional simulation for concentrator photovoltaic module using two types of multi-junction solar cell. Each had its own range of spectral response and based on that range a thin film filter was developed for each case to reflect the unused spectral of the solar spectrum and allowed the desired spectrum to reach the solar cell. The thin film was deposited on a secondary optical element that was used to homogenize the irradiance distribution on the solar cell. A thermal simulation was conducted to compare the resulted decrease in cell temperature due to the use of the thin film for each case.
Highlights
Concentrator photovoltaic (CPV) system is considered one of the most promising technologies in the field of solar energy which have received an increasing attention in R&D in recent years [1]
Using needle optimizing and TFcalc, we developed two filters; the first filter was used for the InGaP/InGaAs/Ge triple junction solar cell concentrator module and it only allowed the spectrum in the range from 400 to 1700 nm to be transmitted onto the solar cell while reflecting the rest of the long wavelength spectrum
As for the thin film used for the InGaP/GaAs/InGaAs triple junction solar cell it transmitted the spectrum in the range from 400 to 1100 nm and reflected the rest of the long wavelength spectrum
Summary
Concentrator photovoltaic (CPV) system is considered one of the most promising technologies in the field of solar energy which have received an increasing attention in R&D in recent years [1]. A CPV system utilizes the inexpensive optical elements, such as Fresnel lenses to concentrate sunlight into a small-size III-V multi-junction solar cell [2]. Multi-junction solar cells are influenced by their operating temperature. Decreasing solar cell temperature can have great impact on the open circuit voltage, maximum power point and efficiency of the multi-junction cell. In this paper we propose a Fresnel lens optical concentration system with concentration ratio of 1322 times. The optical systems concentrate solar irradiance on two types of solar cells. We used thin film filter to utilize the part of solar spectrum which is beneficial to the solar cell while reflecting the rest of the long wavelength spectrum which will result in reduce of the cell temperature. The distance between Fresnel lens and solar cell was 460 mm. Ray trace was carried out in the wave length from 300 to 2500 nm to show the effect of the thin film on the overall performance of the system
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