Issue 25, 2023

Highly efficient light harvesting of a Eu(iii) complex in a host–guest film by triplet sensitization

Abstract

Trivalent lanthanide complexes are attractive light emitters owing to their ideal high color purity. Sensitization using ligands with high absorption efficiency is a powerful approach to enhancing photoluminescence intensity. However, the development of antenna ligands that can be used for sensitization is limited due to difficulties in controlling the coordination structures of lanthanides. When compared to conventional luminescent Eu(III) complexes, a system composed of triazine-based host molecules and Eu(hfa)3(TPPO)2 (hfa: hexafluoroacetylacetonato and TPPO: triphenylphosphine oxide) significantly increased total photoluminescence intensity. Energy transfer from the host molecules to the Eu(III) ion occurs via triplet states over several molecules, according to time-resolved spectroscopic studies, with nearly 100% efficiency. Our discovery paves the way for efficient light harvesting of Eu(III) complexes with simple fabrication using a solution process.

Graphical abstract: Highly efficient light harvesting of a Eu(iii) complex in a host–guest film by triplet sensitization

Supplementary files

Article information

Article type
Edge Article
Submitted
10 apr 2023
Accepted
28 may 2023
First published
29 may 2023
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2023,14, 6867-6875

Highly efficient light harvesting of a Eu(III) complex in a host–guest film by triplet sensitization

S. Miyazaki, K. Goushi, Y. Kitagawa, Y. Hasegawa, C. Adachi, K. Miyata and K. Onda, Chem. Sci., 2023, 14, 6867 DOI: 10.1039/D3SC01817B

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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