Photochemically deoxygenating solvents for triplet-triplet annihilation photon upconversion operating in air

Sulfoxides and cyclic ureas are photochemically deoxygenating solvents in which the oxidative stress could be released and efficient triplet-triplet annihilation photon upconversion (TTA-UC) can operate in air. Such solvents can be practically screened out by harnessing the property of photo-activated phosphorescence. The solvent is the solution: sulfoxides and cyclic ureas are self-deoxygenating solvents in which efficient TTA-UC can operate in air, as predicted by photo-activated phosphorescence.