Issue 35, 2021

Measuring the impact of spin-triplet exciton orientation on photocurrent in an organic transistor

Abstract

The dynamics of triplet and singlet exciton populations in organic semiconductors offer interesting possibilities in improving optical device efficiency, while also attracting interest for future applications as manipulable states for quantum-state based computing. For technological applications, transduction of the exciton state is essential, thus detailed information on how the exciton dynamics affect device outputs is required. In this study, we measure the magnetic field response of the photocurrent in organic transistors to investigate the electrical signal resulting from singlet–triplet exciton dynamics. We find that controlling the orientation of the magnetic dipole orientation of the triplet by varying both the magnitude and orientation of the magnetic field with respect to single crystal axes in anti-2,8-difluoro-5,11-bis(triethylsilylethynyl)anthradithiophene (adiF TES ADT) allows us to manipulate the amount of current detected as a result of singlet fission.

Graphical abstract: Measuring the impact of spin-triplet exciton orientation on photocurrent in an organic transistor

Supplementary files

Article information

Article type
Paper
Submitted
02 apr 2021
Accepted
21 jun 2021
First published
30 jun 2021

J. Mater. Chem. C, 2021,9, 11809-11814

Author version available

Measuring the impact of spin-triplet exciton orientation on photocurrent in an organic transistor

E. G. Bittle, S. Engmann, K. Thorley and J. Anthony, J. Mater. Chem. C, 2021, 9, 11809 DOI: 10.1039/D1TC01539G

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