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 Förster interaction on exciton dynamics and optics in a WSe₂/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 Förster 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.

有机半导体和过渡金属二硫化物（TMD）的混合范德华异质结构是各种光电器件（例如太阳能电池和生物传感器）的有希望的候选者。这些材料中的能量转移过程对于此类设备的效率至关重要，但人们对它们知之甚少。_{在这项工作中，我们开发了一种完全微观的理论，描述了福斯特相互作用对 WSe 2}中激子动力学和光学的影响/并四苯异质叠层。我们证明了差分吸收和时间分辨光致发光可用于跟踪激子的实时演化。我们预测从有机层到 TMD 层的强烈单向能量转移。此外，我们探索了温度在激活福斯特转移中的作用，并发现与之前的实验有很好的一致性。我们的研究结果提供了通过 TMD/有机异质结构中的温度、分子取向和层间分离来调节光捕获效率的蓝图。