Triplet exciton impact on photocurrent in diF TES ADT single crystal transistors

Emily G. Bittle; Sebastian Engmann; Adam J. Biacchi; Emma Holland; John Anthony

doi:10.1117/12.2567979

22 August 2020 Triplet exciton impact on photocurrent in diF TES ADT single crystal transistors

Emily G. Bittle, Sebastian Engmann, Adam J. Biacchi, Emma Holland, John Anthony

Proceedings Volume 11476, Organic and Hybrid Field-Effect Transistors XIX; 114760J (2020) https://doi.org/10.1117/12.2567979
Event: SPIE Organic Photonics + Electronics, 2020, Online Only

Abstract

Dark-state triplet excitons lead to energy loss in organic light emitting diodes and photovoltaics; recently there has been considerable effort to convert this energy to improve device efficiency. While some observed improvement has been tied to control of the triplet state, alternate explanations cannot be ruled out as the influence of device architecture can mask underlying physics. In order to investigate triplet contribution to device output, we study single crystal 2,8-difluoro-5,11-bis(triethylsilylethynyl)anthradithiophene (diF TES ADT) using orientation dependence of the magneto-photocurrent (MPC) in a transistor. MPC changes with magnetic field orientation in the crystal, showing triplet-controlled device output using the anisotropic spin character of the triplet.

Conference Presentation

Citation Download Citation

Emily G. Bittle, Sebastian Engmann, Adam J. Biacchi, Emma Holland, and John Anthony "Triplet exciton impact on photocurrent in diF TES ADT single crystal transistors", Proc. SPIE 11476, Organic and Hybrid Field-Effect Transistors XIX, 114760J (22 August 2020); https://doi.org/10.1117/12.2567979

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