Photochemical Upconversion Enhanced Solar Cells: Effect of a Back Reflector
Australian Journal of Chemistry2012Vol. 65(5), pp. 480–485
Citations Over TimeTop 10% of 2012 papers
T. F. Schulze, Yuen Yap Cheng, Burkhard Fückel, Rowan W. MacQueen, Andrew Danos, Nathaniel J. L. K. Davis, Murad J. Y. Tayebjee, Tony Khoury, R. Clady, Nicholas J. Ekins‐Daukes, Maxwell J. Crossley, Bernd Stannowski, K. Lips, Timothy W. Schmidt
Abstract
Photochemical upconversion is applied to a hydrogenated amorphous silicon solar cell in the presence of a back-scattering layer. A custom-synthesized porphyrin was utilized as the sensitizer species, with rubrene as the emitter. Under a bias of 24 suns, a peak external quantum efficiency (EQE) enhancement of ~2 % was observed at a wavelength of 720 nm. Without the scattering layer, the EQE enhancement was half this value, indicating that the effect of the back-scatterer is to double the efficacy of the upconverting device. The results represent an upconversion figure of merit of 3.5 × 10–4 mA cm–2 sun–2, which is the highest reported to date.
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