Title :
Mechanically stacked two-tandem concentrator solar cell concept
Author :
Beaumont, B. ; Garabedian, P. ; Nataf, G. ; Guillaume, J. ; Gilbart, P. ; Vèrié, C.
Author_Institution :
Lab. de Phys. du Solide et Energie Solaire, CNRS, Valbonne, France
Abstract :
Modeling results and some data from experiments currently under study for a new photovoltaic (PV) structure representing the tractable device adaptation of a quadrispectral concept proposed some years ago are presented. Based on a four-band solar spectrum division, it combines a couple of two-bandgap monolithic tandem cells grown, respectively, on GaAs and InP in a mechanical stacking configuration. In the PV concentrator approach, the objective of this rainbow cell design is to demonstrate the feasibility of efficiencies on the order of 40% (100×AM0, BOL) and 45% (500×AM1.5), utilizing III-V semiconductor materials currently used in optical fiber communication systems. In studying the influence of airmass values, the InP substrate-based booster tandem of universal use, either in space or in terrestrial applications, is found. Considering the GaAs-based tandem structure, an Am1-to-AM3 analysis leads to specification of the optimal top bandgap value. Projections of expected experimental efficiencies of this stacked two-tandem concentrator cell show that the objectives are realistic
Keywords :
III-V semiconductors; gallium arsenide; indium compounds; solar cells; solar energy concentrators; 40 percent; 45 percent; GaAs; III-V semiconductor; InP; airmass values; bandgap; concentrator solar cells; design; mechanical stacking; monolithic tandem cells; quadrispectral concept; Gallium arsenide; III-V semiconductor materials; Indium phosphide; Optical design; Optical fiber communication; Photovoltaic cells; Photovoltaic systems; Semiconductor materials; Solar power generation; Stacking;
Conference_Titel :
Photovoltaic Specialists Conference, 1990., Conference Record of the Twenty First IEEE
Conference_Location :
Kissimmee, FL
DOI :
10.1109/PVSC.1990.111589
