European Metrology Project for III-V Materials Based High Efficiency Multi-Junction Solar Cells

Since July 2014, thirteen European metrology organizations are collaborating to address some of the main metrological challenges faced by the developments of high-efficiency III-V multi-junction solar cells (MJSC). III-V MJSC structures are made of a high number of layers, which makes a pure experimental optimization difficult and expensive; this also limits the uncertainty of cell calibration due to the complexity of their spectral response. The project is structured in three distinct parts: Each part of the project is briefly introduced and we present NPL initial results in developing accurate and spatially resolved metrology to determine traceable and complete III -V material data sets.