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Annihilator dimers enhance triplet fusion upconversion

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Abstract

Optical upconversion is a net process by which two low energy photons are converted into one higher energy photon. There is vast potential to exploit upconversion in applications ranging from solar energy and biological imaging to data storage and photocatalysis. Here, we link two upconverting chromophores together to synthesize a series of novel tetracene dimers for use as annihilators. When compared with the monomer annihilator, TIPS–tetracene, the dimers yield a strong enhancement in the triplet fusion process, also known as triplet–triplet annihilation, as demonstrated via a large increase in upconversion efficiency and an order of magnitude reduction of the threshold power for maximum yield. Along with the ongoing rapid improvements to sensitizer materials, the dimerization improvements demonstrated here open the way to a wide variety of emerging upconversion applications.

Graphical abstract: Annihilator dimers enhance triplet fusion upconversion

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Publication details

The article was received on 21 Aug 2018, accepted on 20 Feb 2019 and first published on 07 Mar 2019


Article type: Edge Article
DOI: 10.1039/C8SC03725F
Citation: Chem. Sci., 2019, Advance Article
  • Open access: Creative Commons BY-NC license
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    Annihilator dimers enhance triplet fusion upconversion

    A. B. Pun, Samuel N. Sanders, M. Y. Sfeir, L. M. Campos and D. N. Congreve, Chem. Sci., 2019, Advance Article , DOI: 10.1039/C8SC03725F

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