Issue 12, 2022

Purely organic Vis-to-UV upconversion with an excited annihilator singlet beyond 4 eV

Abstract

The conversion of visible light into high-energy UV photons via sensitized triplet–triplet annihilation (TTA-UC) could pave the way for several energy-demanding applications. However, only a handful of annihilator chromophores for Vis-to-UV upconversion are known and the current limit for the excited-state energy of the UV emitter in TTA-UC schemes is below 4 eV, i.e., in the spectral region (>310 nm) where the sun still provides a considerable photon flux. Herein, we present a novel biphenyl-based annihilator with a highly fluorescent singlet state at 4.04 eV. This annihilator can be combined with a widely-used TADF sensitizer to yield an efficient blue-light (2.77 eV) driven upconversion system with unprecedented properties.

Graphical abstract: Purely organic Vis-to-UV upconversion with an excited annihilator singlet beyond 4 eV

Supplementary files

Article information

Article type
Communication
Submitted
06 oct. 2021
Accepted
03 nov. 2021
First published
04 nov. 2021

J. Mater. Chem. C, 2022,10, 4568-4573

Purely organic Vis-to-UV upconversion with an excited annihilator singlet beyond 4 eV

T. J. B. Zähringer, M. Bertrams and C. Kerzig, J. Mater. Chem. C, 2022, 10, 4568 DOI: 10.1039/D1TC04782E

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