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1 August 2021 The magnetic filed effect of the singlet fission reaction in polycrystalline tetracene-based diodes
Tzung-Fang Guo, Shi-Hong Lou, Wei-Cheng Liu, Chien-Chih Wu
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Proceedings Volume 11808, Organic and Hybrid Light Emitting Materials and Devices XXV; 118080A (2021) https://doi.org/10.1117/12.2594167
Event: SPIE Organic Photonics + Electronics, 2021, San Diego, California, United States
Abstract
We characterize the magneto photocurrent (MPC) response in polycrystalline tetracene-based diodes and magneto photoluminescence of the tetracene film and attribute the initially decreasing and then increasing MPC responses to the feature of the singlet fission (SF) reaction. The SF reaction in polycrystalline tetracene active layer is more evident when the device was irradiated with the short wavelength of irradiation. This observation indicates a possible route to utilize the excess exciting energy for the generation of extra excited states (triplet) to contribute the higher photocurrent. Additionally, through the measurement of magneto electroluminescence of tetracene-based diodes operated under the forward bias regime, we are able to characterize the reaction of triplet-triplet annihilation (TTA) to harvest the energy from triplet to singlet excitons in part contribute the emission of fluorescence especially in the high current density and low temperature regime.
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Tzung-Fang Guo, Shi-Hong Lou, Wei-Cheng Liu, and Chien-Chih Wu "The magnetic filed effect of the singlet fission reaction in polycrystalline tetracene-based diodes", Proc. SPIE 11808, Organic and Hybrid Light Emitting Materials and Devices XXV, 118080A (1 August 2021); https://doi.org/10.1117/12.2594167
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KEYWORDS
Diodes
Magnetism
Luminescence
Electroluminescence
Excitons
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