ArticleChemical science2026
Photon upconversion with indium phosphide quantum dots enables high-energy photoreactions using visible light.
Article in Chemical science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Photochemical reactions that rely on high-energy photons are limited by low solar abundance in the UV region and undesired photodecomposition. Photon upconversion processes, particularly triplet-triplet annihilation-based upconversion (TTA-UC), provide an alternate pathway to enable the use of low-energy, abundant visible and near-infrared (NIR) light for chemical transformations that typically require high-energy UV light. In this context, quantum dot (QD)-sensitized TTA-UC systems offer distinct advantages with respect to a larger anti-Stokes shift, enhanced upconversion quantum yield, and superior photostability. However, the successful application of QD-sensitized upconversion energy in photocatalysis remains limited, especially for high-energy reactions requiring UV-active catalysts. Here, we report the use of upconversion energy from a QD-sensitized TTA-UC system in performing a high-energy-driven dehalogenation reaction with visible light. Indium phosphide (InP) QDs are used as the sensitizer and diphenylanthracene (DPA) as the annihilator molecule, which gave a green-to-blue TTA-UC with a normalized upconversion quantum yield of ∼8.2% and an apparent anti-Stokes shift of 0.55 eV. The upconversion energy from the InP QD-sensitized TTA-UC system is effectively used to drive a photoredox C-C coupling reaction
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