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 language | English |
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Title of host publication | Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion IV |
Volume | 8824 |
DOIs | |
Publication status | Published - 2013 |
Externally published | Yes |
Event | Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion IV - San Diego, CA, United States of America Duration: 25 Aug 2013 → 27 Aug 2013 |
Conference
Conference | Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion IV |
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Country/Territory | United States of America |
City | San Diego, CA |
Period | 25/08/13 → 27/08/13 |
Keywords
- Nanostructured
- Solar-cell enhancement
- Triplet-triplet annihilation
- Upconversion