Challenges and Breakthroughs in Purely Organic TTA-UC: The Central Role of Heavy-Atom-Enhanced Thermally Activated Delayed Fluorescence Photosensitizers

Triplet-triplet annihilation upconversion (TTA-UC) mechansim, a process that converts low-energy photons into higherenergy emissions, has attracted considerable interest in photophysics and photochemistry due to its potential applications. Thermally activated delayed...