Modified consumer camera can measure solar cell open-circuit voltage

Researchers from the University of Stuttgart, Forschungszentrum Jülich, and German company Solarzentrum Stuttgart have modified a low-cost consumer digital camera to detect infrared radiation emitted by electrically biased silicon solar modules and measure their external quantum efficiency (EQE). In PV devices, EQE describes how efficiently electrons passing through a solar cell are converted into emitted photons during electroluminescence. The parameter can be used to assess the radiative quality of a solar cell and determine its open-circuit voltage. "Our approach shows that even a relatively ...

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