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arXiv · 2305.02853

Optical Signatures of F\"{o}rster-induced energy transfer in organic/TMD heterostructures

Joshua J. P. Thompson·Marina Gerhard·Gregor Witte·Ermin Malic
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Abstract

Hybrid van der Waals heterostructures of organic semiconductors and transition metal dichalcogenides (TMDs) are promising candidates for various optoelectronic devices, such as solar cells and biosensors. Energy-transfer processes in these materials are crucial for the efficiency of such devices, yet they are poorly understood. In this work, we develop a fully microscopic theory describing the effect of the F\"{o}rster interaction on exciton dynamics and optics in a WSe$_2$/tetracene heterostack. We demonstrate that the differential absorption and time-resolved photoluminescence can be used to track the real-time evolution of excitons. We predict a strongly unidirectional energy transfer from the organic to the TMD layer. Furthermore, we explore the role temperature has in activating the F\"{o}rster transfer and find a good agreement to previous experiments. Our results provide a blueprint to tune the light-harvesting efficiency through temperature, molecular orientation and interlayer separation in TMD/organic heterostructures.

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Joshua J. P. Thompson, Marina Gerhard, Gregor Witte, Ermin Malic. 2023-05-04. Optical Signatures of F\"{o}rster-induced energy transfer in organic/TMD heterostructures. https://arxiv.org/abs/2305.02853

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