Harnessing molecular photon upconversion at sub-solar irradiance using dual sensitized self-assembled trilayers

Harnessing molecular photon upconversion at sub-solar irradiance using dual sensitized self-assembled trilayers

Photon upconversion via triplet-triplet annihilation (TTA-UC) is an intriguing strategy to potentially increase maximum solar cell efficiencies from 33% to greater than 43%. TTA-UC has been incorporated into a dye-sensitized solar cell (DSSC) but the low solar energy conversion efficiency can be att...

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Veröffentlicht in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2017, Vol.5 (23), p.11652-11660
Hauptverfasser: Dilbeck, Tristan, Hill, Sean P, Hanson, Kenneth
Format: Artikel
Sprache:eng
Schlagworte:
Absorption
Efficiency
Irradiance
Photons
Photovoltaic cells
Self assembly
Solar cells
Upconversion
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Zusammenfassung:Photon upconversion via triplet-triplet annihilation (TTA-UC) is an intriguing strategy to potentially increase maximum solar cell efficiencies from 33% to greater than 43%. TTA-UC has been incorporated into a dye-sensitized solar cell (DSSC) but the low solar energy conversion efficiency can be attributed, at least in part, to the relatively narrow absorption features of the sensitizer molecule. Here we incorporate multiple sensitizers into a TTA-UC DSSC using bilayer and trilayer self-assembly via metal ion linkages. The sensitizers' complementary absorption features increase broad-band light absorption and work cooperatively to achieve peak TTA-UC efficiency at sub-solar irradiance (
ISSN:2050-7488
2050-7496
DOI:10.1039/c7ta00317j