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Issue 15, 2018
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Cascade sensitization of triplet–triplet annihilation based photon upconversion at sub-solar irradiance

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Abstract

In triplet–triplet annihilation based upconversion, high-energy photons are generated through the annihilation of fluorophore triplets, populated via energy transfer from a light-harvesting sensitizer. However, the absorption band of common sensitizers is narrow, limiting the fraction of recoverable photons. We overcome this issue using a third chromophore as an additional light-harvester in the transparency window between the upconverted luminescence and the sensitizer absorption. The third component transfers the extra-collected energy to sensitizers, realizing a cascade-sensitized upconversion that shows a 20% increment of the high-energy photon output and a conversion yield of 10% at solar irradiance.

Graphical abstract: Cascade sensitization of triplet–triplet annihilation based photon upconversion at sub-solar irradiance

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Publication details

The article was received on 21 Feb 2018, accepted on 16 Mar 2018 and first published on 16 Mar 2018


Article type: Communication
DOI: 10.1039/C8CP01176A
Citation: Phys. Chem. Chem. Phys., 2018,20, 9745-9750
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    Cascade sensitization of triplet–triplet annihilation based photon upconversion at sub-solar irradiance

    J. Pedrini, A. Monguzzi and F. Meinardi, Phys. Chem. Chem. Phys., 2018, 20, 9745
    DOI: 10.1039/C8CP01176A

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