Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 116, Issue -, Pages 126-134Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2013.04.011
Keywords
Photovoltaics; Modulated photocurrent; PV; CdTe cells; Electro-optical characterization; Dynamic response
Funding
- Engineering Laboratory of the National Institute of Standards and Technology
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Modulated photocurrent spectroscopy was used to investigate the dynamic response of charge carrier transport in thin film CdTe/CdS solar cells. The impact of light bias and temperature over a broad excitation frequency range were measured. The observed features of the data, including a photocurrent 'phase-lead' and a 'phase-lag' over different regions of the frequency spectrum, were explored in the context of an equivalent circuit model. Comparisons between the model's predicted performance and the measured data suggest that charge carrier recombination at the cell's back metal/semiconductor contact is the main source of photocurrent loss in these devices. Published by Elsevier B.V.
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