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Understanding intrinsic carrier lifetime in disordered organic solid‐state semiconductors is essential for improving device performance in not only molecule‐based optoelectronic devices such as organic solar cells (OSC) but also photocatalysts used for producing solar fuel cells. Carriers in disordered films are generally thought to have short lifetimes on a scale ranging from nanoseconds to milliseconds...
As in many fields, the most exciting endeavors in photon upconversion research focus on increasing the efficiency (upconversion quantum yield) and performance (anti‐Stokes shift) while diminishing the cost of production. In this vein, studies employing metal‐free thermally activated delayed fluorescence (TADF) sensitizers have garnered increased interest. Here, for the first time, the strategy of...