Issue 26, 2024

Thermally activated delayed fluorescence emitters for efficient sensitization of europium(iii)

Abstract

We demonstrate for the first time a unique approach to efficiently sensitize lanthanides(III) using photosensitizer ligands that show thermally activated delayed fluorescence (TADF). TADF ligands have very small singlet (S1) and triplet (T1) excited state energy splitting and S1/T1 energy levels are in optimum energy to the acceptor level of Eu(III) to enable high energy transfer efficiency. The synthesized Eu(III) coordination polymers with TADF ligands showed bright red luminescence with an outstanding sensitization efficiency of 90–94% and Φtot of 79–85% in poly(methyl methacrylate) encapsulated films. This rational approach of efficiently sensitizing lanthanides with TADF ligands demonstrates their great potential for imaging and optical communications applications.

Graphical abstract: Thermally activated delayed fluorescence emitters for efficient sensitization of europium(iii)

Supplementary files

Article information

Article type
Paper
Submitted
19 Apr 2024
Accepted
30 May 2024
First published
31 May 2024
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2024,26, 18129-18137

Thermally activated delayed fluorescence emitters for efficient sensitization of europium(III)

N. K. Kalluvettukuzhy, M. R. Maciejczyk and N. Robertson, Phys. Chem. Chem. Phys., 2024, 26, 18129 DOI: 10.1039/D4CP01610F

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