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External Quantum Efficiency Measurements of Luminescent Solar Concentrators: a Study of the Impact of Backside Reflector Size and Shape
M. Pravettoni, D.J. Farrell, A.J. Chatten, R. Bose, R.P. Kenny, K.W.J. Barnham
Spectral Response, Luminescent Solar Collectors, Concentrator
Advanced Photovoltaics
Subtopic: New Materials, Cells and Modules
Event: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany
Session: 1CV.3.41
332 - 335
ISBN: 3-936338-25-6
Paper DOI: 10.4229/24thEUPVSEC2009-1CV.3.41
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Document(s): paper


Several works have appeared in the literature as a result of the joint activity of Imperial College London with the European Solar Test Installation and other European research centres on luminescent solar concentrators: some have been specifically related to indoor and outdoor characterisation. Within the characterisation processes, the external quantum efficiency is particularly important: by means of external quantum efficiency measurements, spectral mismatch correction can be performed, enabling performance predictions for any given irradiance conditions. In recent works an increase in module efficiency due to a diffusive reflector at the backside of the concentrator has been shown. In this work we present recent results on the impact of a non-index-matched backside diffusive reflector on the external quantum efficiency of a luminescent solar concentrator and therefore on the short-circuit current of the device: the result is particularly relevant in view of using luminescent solar concentrators in building integration of photovoltaics.