Breaking the 1250 nm Barrier: A Computational Approach to Light Upconversion via Triplet-Triplet Annihilation in the Silica Telecom Band.

ABSTRACT: The 1250-1675 nm region is the spectral range exploited in modern telecommunications and quantum networks because of the high transparency of silica-based nanofibers. Nevertheless, the low efficiency of detectors and sensors in that region requires light upconversion (UC). This is achieved with inorganic dopants, often based on rare-earth elements or metal nanoparticles that are characterized by a low chemical flexibility besides sustainability issues. Triplet-triplet annihilation upconversion (TTA-UC) is a process that exploits as emitters organic molecules that would remove or mitigate these limitations. Nevertheless, no TTA-UC emitters have been reported to be able to absorb in the telecom region and very few in the region at wavelengths longer than 1000 nm. Here, we used Kohn-Sham dens

SUBMITTER: Vitillo JG 

PROVIDER: S-EPMC12934551 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature