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



Emily Bittle, Sebastian Engmann, Karl Thorley, John Anthony


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 manipulatable states for quantum-state based computing. For technological application, having detailed information on how the exciton dynamics affect electrical output of a traditional device, or on how exciton information can be transduced, is important to underpin future developments of exciton-based devices. In this study, we measure the magnetic field response of photocurrent in organic transistors to investigate the electrical signal resulting from singlet-triplet exciton dynamics. We find that we can manipulate the proportion of triplets harvested 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), corresponding with effects due to the magnetic dipole orientation of the triplets.
Journal of Materials Chemistry C


excitons, magneto-photocurrent, organic electronics, spin


Bittle, E. , Engmann, S. , Thorley, K. and Anthony, J. (2021), Measuring the impact of spin-triplet exciton orientation on photocurrent in an organic transistor, Journal of Materials Chemistry C, [online],, (Accessed May 23, 2024)


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Created June 30, 2021, Updated November 29, 2022