Nanostructured upconverters for improved solar cell performance

Rowan W. MacQueen; Tim F. Schulze; Tony Khoury; Yuen Yap Cheng; Bernd Stannowski; Klaus Lips; Maxwel J. Crossley; Timothy Schmidt

doi:10.1117/12.2026907

25 September 2013 Nanostructured upconverters for improved solar cell performance

Rowan W. MacQueen, Tim F. Schulze, Tony Khoury, Yuen Yap Cheng, Bernd Stannowski, Klaus Lips, Maxwel J. Crossley, Timothy Schmidt

Author Affiliations +

Proceedings Volume 8824, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion IV; 882408 (2013) https://doi.org/10.1117/12.2026907
Event: SPIE Solar Energy + Technology, 2013, San Diego, California, United States

Abstract

Triplet-triplet annihilation photon upconversion (TTA-UC) is a promising candidate for mitigating sub-band gap absorption losses in solar cells. In TTA-UC, sensitiser dyes absorb sub-band gap photons, cross to a triplet state, and transfer triplet excitons to emitter dyes. Two triplet-excited emitters can undergo TTA, raising one emitter to a higher-energy bright singlet state. The quadratic efficiency of TTA-UC at device-relevant light intensities motivates a push towards the higher chromophore densities achievable in the solid phase. We have begun this process by tethering tetrakisquinoxalino palladium porphyrin to 20nm silica nanoparticles using peptide chemistry techniques, achieving a total-volume concentration of 1.5mM. The phosphorescence kinetics of the tethered porphyrins was measured to quantify quenching by rubrene emitter. Upconverter performance was measured in a solar cell enhancement experiment.

Citation Download Citation

Rowan W. MacQueen, Tim F. Schulze, Tony Khoury, Yuen Yap Cheng, Bernd Stannowski, Klaus Lips, Maxwel J. Crossley, and Timothy Schmidt "Nanostructured upconverters for improved solar cell performance", Proc. SPIE 8824, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion IV, 882408 (25 September 2013); https://doi.org/10.1117/12.2026907

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