Nanostructured upconvertors for improved solar cell performance

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

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

13 Citations (Scopus)

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.

Original languageEnglish
Title of host publicationNext Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion IV
Volume8824
DOIs
Publication statusPublished - 2013
Externally publishedYes
EventNext Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion IV - San Diego, CA, United States of America
Duration: 25 Aug 201327 Aug 2013

Conference

ConferenceNext Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion IV
CountryUnited States of America
CitySan Diego, CA
Period25/08/1327/08/13

Keywords

  • Nanostructured
  • Solar-cell enhancement
  • Triplet-triplet annihilation
  • Upconversion

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