Abstract
In order to correctly calibrate a photovoltaic device the irradiance arriving at the device must be measured with a minimum of uncertainty with a traceable reference device. For un‐concentrated light reliable reference devices are available. However, standard reference devices are not appropriate under concentration. Therefore, in order to calibrate a Concentrator photovoltaic (CPV) cell either a) the linearity of the short circuit current (Isc) of the CPV cell must be verified over several orders of magnitude of irradiance allowing extrapolation of performance from its one Sun value; or b) a reference device usable under concentrated light must be employed. In this work standard reference cells are combined with neutral density (ND) filters to enable simultaneous cell and irradiance measurement up to high intensity levels. Before employing the filtered reference device it has been calibrated at 1000 W/m2 and its linearity has been verified by comparison with a standard reference device of known linearity. Results of preliminary measurements on CPV cells are also presented.
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