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HIGH EFFICIENCY III-V SOLAR CELLS FOR USE WITH FLUORESCENT CONCENTRATORS

Objective

THE AIM OF THIS STUDY IS TO INVESTIGATE THE FEASIBILITY OF MOCVD AND MBE FOR THE FABRICATION OF HIGH EFFICIENCY LARGE BANGAP GAAS/ALGAAS SOLAR CELLS, WHICH CAN BE USED IN FLUORESCENT CONCENTRATORS.

THE ALLOY COMPOSITION OF THE ALGAAS WILL BE OPTIMIZED CONSIDERING BOTH HIGH QUALITY OF THE CELL ITSELF AND THE OPTIMUM WAVELENGHT OF THE CONCENTRATOR. THIS LAST POINT DEPENDS ON THE DYE USED IN THE CONCENTRATOR FABRICATED BY AN OTHER CONTRACTOR.

THE PERFORMANCE OF THE CELL WILL STRONGLY BE INFLUENCED BY THE QUALITY OF THE ALGAAS LAYERS. DEEP RECOMBINATION CENTERS AND THE DIRECT-INDIRECT TRANSITION WILL INFLUENCE THE MAXIMUM ALLOWED (IN TERMS OF EFFICIENCY) AL CONCENTRATION AND IN THIS WAY OF COURSE THE MAXIMUM BANDGAP.
BY INCREASING GRADUALLY THE AL CONCENTRATION IN THE ACTIVE PART OF THE CELL, WE WILL INVESTIGATE THE INFLUENCE OF THIS PARAMETER ON THE SPECTRAL RESPONSE OF THE CELL AND OF ITS EFFICIENCY.

THE JUNCTION IS IN GAAS, THE EFFICIENCY UNDER AM1.5 ILLUMINATION IS 16.7%, VOC = 0.98V AND JSC = 22.7 MA/CM2, FF = 75%.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

INTERUNIVERSITAIR MIKRO-ELEKTRONICA CENTRUM VZW
Address
75,Kapeldreef 75
3001 Heverlee
Belgium