Issue 12, 2022

Recent advances in materials for and applications of triplet–triplet annihilation-based upconversion

Abstract

Triplet–triplet annihilation upconversion (TTA-UC) has been attracting attention in various fields as a promising tool to efficiently generate a shorter-wavelength photon than incident light. Compared to conventional UC technologies (e.g., lanthanide-doped inorganic nanoparticles), TTA-UC has advantages of tunable spectral range and high UC efficiency (>1–40%) at non-coherent solar irradiance (Iex < 1–102 mW cm−2). This review article provides a succinct overview of the historical background and recent strategies for solving a critical problem (i.e. oxygen quenching) of TTA-UC to improve the efficiency and to expand its applicability in various fields. We also introduce recent strategies to develop host materials (e.g., films, polymers, nanocapsules, gels) for overcoming a quenching problem, before we detail recent progress in applications of TTA-UC materials involving bioimaging, biomedicines, photocatalysts, photovoltaics and OLEDs. This review article aims to highlight the challenges and recent advances in the field of TTA-UC, providing the readers with guidance and opportunities to join the research.

Graphical abstract: Recent advances in materials for and applications of triplet–triplet annihilation-based upconversion

Associated articles

Article information

Article type
Review Article
Submitted
30 7 2021
Accepted
29 11 2021
First published
08 12 2021

J. Mater. Chem. C, 2022,10, 4483-4496

Recent advances in materials for and applications of triplet–triplet annihilation-based upconversion

S. E. Seo, H. Choe, H. Cho, H. Kim, J. Kim and O. S. Kwon, J. Mater. Chem. C, 2022, 10, 4483 DOI: 10.1039/D1TC03551G

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