BLISS, M. ... et al, 2015. Spatially and spectrally resolved electroluminescence measurement system for photovoltaic characterisation. IET Renewable Power Generation, 9(5), pp.446-452.
A system that combines the advantages of fast global electroluminescence (EL) imaging and detailed spectrally resolved EL measurements is presented. A charge-coupled device camera-based EL imaging system is used to measure the intensity of radiative recombination of the photovoltaic (PV) device spatially resolved over its full area. A monochromator-based system is utilised to measure localised emission spectra at given points of interest. Measurements of multi-crystalline and amorphous silicon PV devices demonstrate the potential to investigate radiative defects and reveal performance variations and non-uniformities. This links inhomogeneities much closer to device physics than using camera-based EL only.
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This work has been supported by a joint UK–India initiative in solar
energy through a joint project ‘Stability and Performance of
Photovoltaics (STAPP)’ funded by the Research Councils UK
(RCUK) Energy Programme in UK [grant no: EP/H040331/]
and by the Department of Science and Technology (DST) in India.