Optimum Design for Super-High Efficiency Concentrator Solar Cell
Year: 2008
Type: article
Abstract: A very high efficiency solar cell for concentrator application was developed by improving the concentration ratio which gave the maximum efficiency utilizing the conventional InGaP/GaAs/Ge triple junction cells. Calculations were done about efficiency under high illumination in the cells with different sheet resistance 60Ω/sq and 6Ω/sq as a function of cell size. The calculations suggested that high efficiency more than 40% were achievable in small cells with less than 5 x 5 mm2 size and with 60Ω/sq sheet resistance. Sheet resistance of 60Ω/sq was confirmed experimentally under high concentration ratio over 1,000 suns. We evaluated the increase in intensity by reducing cell size experimentally. It was confirmed that the concentration ratio which gave the maximum efficiency was increased by reducing cell size and high efficiency of 40% was achieved under 1,100 suns in a 4.5 x 4.5 mm2 size cell with 125μm grid pitch. Good agreement between theoretical and experimental studies was confirmed.
Source: EU PVSEC
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2198619940