Photon-upconverters for blue organic light-emitting diodes: a low-cost, sky-blue example.

ABSTRACT: In the research ecosystem's quest towards having deployable organic light-emitting diodes with higher-energy emission (e.g., blue light), we advocate focusing on fluorescent emitters, due to their relative stability and colour purity, and developing design strategies to significantly improve their efficiencies. We propose that all triplet-triplet annihilation upconversion (TTA-UC) emitters would make good candidates for triplet fusion-enhanced OLEDs ("FuLEDs"), due to the energetically uphill nature of the photophysical process, and their common requirements. We demonstrate this with the low-cost sky-blue 1,3-diphenylisobenzofuran (DPBF). Having satisfied the criteria for TTA-UC, we show DPBF as a photon upconverter (I _th 92 mW cm^-2), and henceforth demo

SUBMITTER: Yang L 

PROVIDER: S-EPMC8886671 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature