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

Published

June 30, 2021

Author(s)

Emily Bittle, Sebastian Engmann, Karl Thorley, John Anthony

Abstract

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.

Citation

Journal of Materials Chemistry C

Volume

9

Issue

35

Pub Type

Journals

Download Paper

https://doi.org/10.1039/D1TC01539G

Local Download

Keywords

excitons, magneto-photocurrent, organic electronics, spin

Citation

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], https://doi.org/10.1039/D1TC01539G, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932087 (Accessed October 13, 2025)