Photochemical upconversion enhanced solar cells: Effect of a back reflector

Tim F. Schulze, Yuen Yap Cheng, Burkhard Fckel, Rowan W. Macqueen, Andrew Danos, Nathaniel J L K Davis, Murad J.Y. Tayebjee, Tony Khoury, Raphaël G.C.R. Clady, N. J. Ekins-Daukes, Maxwell J Crossley, Bernd Stannowski, Klaus Lips, Timothy W. Schmidt

Research output: Contribution to journalArticleResearchpeer-review

80 Citations (Scopus)


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 720nm. 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 -4mAcm -2sun -2, which is the highest reported to date.

Original languageEnglish
Pages (from-to)480-485
Number of pages6
JournalAustralian Journal of Chemistry
Issue number5
Publication statusPublished - 2012
Externally publishedYes

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