Why triplet-triplet annihilation requires less power than two-photon absorption?
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Photon Upconversion: From Two-photon Absorption (TPA) To Triplet-triplet Annihilation (TTA) Organic upconversion is a unique process in which low-energy light (usually NIR light) is converted to high-energy light through either two-photon absorption(TPA) mechanism or triplet-triplet annihilation (TTA) mechanism.
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Photon Upconversion: From Two-photon Absorption (TPA) To Triplet-triplet Annihilation (TTA) Organic upconversion is a unique process in which low-energy light (usually NIR light) is converted to high-energy light through either two-photon absorption (TPA) mechanism or triplet-triplet annihilation (TTA) mechanism.
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