SILICON-BASED MULTI-JUNCTION SOLAR CELL WITH 19.7% EFFICIENCY AT 1-SUN USING AREAL CURRENT MATCHING FOR 2-TERMINAL OPERATION

The areal current matching technique is introduced as a novel method to achieve current matching in multi-junction solar cells for 2-terminal operation. A hybrid-integrated InGaP/(ln)GaAs/Si 3-junction tandem cell is demonstrated for the first time, showing 1 sun AM 1.5G efficiency of 19.7% in 2-terminal operation, with an area of 0.89 cm.