Organic molecules and macromolecules (MnMs) that harvest and convert one photon to one exciton have been exploited in chemistry, optoelectronics, and optics. The single light-induced excitons formed in a variety of organic MnMs essentially serve as a source of potential energy to trigger photophysical and photochemical processes with spatiotemporal control. However, conventional mechanisms of exciton generation can be impaired by inherent energetic losses. Therefore, efforts are now geared to develop materials that generate multiple excitons from a single photon to overcome thermodynamic limitations. Singlet fission is a process that has been observed in organic MnMs, where a singlet excited state can lead to two triplet states. This talk will highlight our work focused on understanding how the chemistry of molecular building blocks and their architectural connectivity in macromolecular systems impact the formation and dynamics of triplet pairs from a single incident photon.

Manipulating Multiexciton Mechanisms in Molecules and Macromolecules

ACS Fall 2021

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