Organic Polymer Hosts for Triplet–Triplet Annihilation Upconversion Systems

Triplet–triplet annihilation upconversion (TTA-UC) is a process by which lower energy photon can be upconverted to higher state. The incorporation of TTA-UC materials into solid-state hosts has enabled advances in solar and many other applications. choice host system is, however, far from trivial often calls for careful compromise between characteristics such as high molecular mobility, low oxygen diffusion, material stability, factors that contradict one another. Here, we evaluate these challenges the context state-of-the-art primarily polymer advantages they hold terms selection tunability their diffusion or mechanical thermal properties. We encourage more collaborative research scientists photophysicists order further optimize current systems outline our thoughts future direction field.