Measurement of the Open-Circuit Voltage of Individual Subcells in a Dual-Junction Solar Cell PROJECT TITLE :Measurement of the Open-Circuit Voltage of Individual Subcells in a Dual-Junction Solar CellABSTRACT:Dual-junction solar cells have the potential for higher conversion efficiencies than single junctions, thanks to a better utilization of the solar spectrum. However, their optimization is more complex because the monolithic interconnection makes the individual subcell electrical measurement difficult or impossible. This study presents a new technique to measure the open-circuit voltage V $_{rm OC}$ of each individual subcell of a dual-junction device with a method that circumvents the need for completely selective illumination. The method is based on the description of the total device V$_{rm OC}$ as a function of two independent variables determined by two distinct illumination spectra. Without completely selective illumination, one can measure only a limited range of this function; however, an unambiguous extension gives values corresponding to the conditions of ideal selectivity, which correspond in turn to the V$_{rm OC}$ of the individual subcells at 1-sun illumination. This method does not rely on any specific electrical or optical model of solar cell. Method is successfully tested with a simple measurement setup based on commercially available luminescence diodes and voltmeters in combination with specially prepared three-terminal dual-junction thin-film silicon solar cells. Did you like this research project? To get this research project Guidelines, Training and Code... Click Here facebook twitter google+ linkedin stumble pinterest Maximizing the Power Output of Partially Shaded Photovoltaic Plants Through Optimization of the Interconnections Among Its Modules Superposition and Reciprocity in the Electroluminescence and Photoluminescence of Solar Cells