Abstract:Triplet excitons are ubiquitous in organic chromophores and possess intrinsically longer lifetimes than their singlet exciton counterparts, and thus potentially larger diffusion lengths that have been considered beneficial for organic solar cells (OSCs). However, existing triplet-generating materials rarely possess low bandgap, high triplet energy and yield, and good crystallinity and charge mobility within a single compound. In this account, I first describe the rationales behind our “roller-wheel” type molec… Show more
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