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. 2022 Aug 7;2(6):641–654. doi: 10.1021/acsmaterialsau.2c00047

Figure 1.

Figure 1

Schematic of NC-sensitized TTA-UC. (a) Direct TTA: Triplet excitons are transferred directly from the NC to an annihilator via triplet energy transfer (ET). TTA yields the high energy singlet state. (b) Ligand-mediated TTA: Triplet excitons are transferred from the NC to a surface-bound transmitter ligand. A second ET step populates the annihilator, enabling TTA. (c) Illustration demonstrating the two triplet sensitization pathways. Direct ET to the annihilator occurs (left) and ligand-mediated population of the annihilator triplet state (right).