Porphyrin-Anthracene Complexes: Potential in Triplet-Triplet Annihilation Upconversion
Journal article, 2016

Triplet-triplet annihilation photon upconversion (TTA-UC) systems contain both an absorbing and an emitting molecule, the sensitizer and annihilator, respectively. Through a series of energy-transfer steps, two low frequency,photons can be combined into one high frequency photon. In organic solvents, the required energy transfer steps are limited by diffusion and are relatively efficient. In solid-state systems, however, the diffusion is slower, which usually results in lower efficiencies for these systems. An interesting way around this is to connect the sensitizer and annihilator. In order to increase understanding of the TTA-UC process in supramolecular systems, we synthesized four pyridine-substituted anthracene annihilators capable of coordinating axially to a zinc octaethylporphyrin sensitizer with a maximum binding constant of 6000 M-1 in toluene. This is a first example of a sensitizer-annihilator coordination complex for TTA-UC. Both the upconversion efficiency and the parasitic quenching of excited annihilator singlets by the sensitizer through Forster resonant energy transfer (FRET) were studied. On the basis of the findings herein, possible strategies for future supramolecular TTA systems with minimized FRET quenching are discussed.

silicon solar-cells

energy migration

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Materials Science

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Author

Victor Gray

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Karl Börjesson

University of Gothenburg

Damir Dzebo

Chalmers, Chemistry and Chemical Engineering, Chemistry and Biochemistry, Physical Chemistry

Maria Abrahamsson

Chalmers, Chemistry and Chemical Engineering, Chemistry and Biochemistry, Physical Chemistry

Bo Albinsson

Chalmers, Chemistry and Chemical Engineering, Chemistry and Biochemistry, Physical Chemistry

Kasper Moth-Poulsen

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Journal of Physical Chemistry C

1932-7447 (ISSN) 1932-7455 (eISSN)

Vol. 120 34 19018-19026

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Energy

Materials Science

Infrastructure

Chalmers Infrastructure for Mass spectrometry

Chalmers Materials Analysis Laboratory

Roots

Basic sciences

Subject Categories

Chemical Engineering

Chemical Sciences

DOI

10.1021/acs.jpcc.6b06298

More information

Latest update

5/17/2018