Tunability of the Energy Transfer Process in Type-II Heterostructures,ACS Photonics

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Tunability of the Energy Transfer Process in Type-II Heterostructures
ACS Photonics ( IF 6.5 ) Pub Date : 2024-08-30 , DOI: 10.1021/acsphotonics.4c00903
Yan Li ₁ , Yan Zeng ₁ , Zhenwei Ou ₁ , Wei Dai ₁ , Cheng Wang ₁ , Zhe Li ₁ , Wenbo Li ₁ , Jiakai Yan ₁ , Shaogang Yu ₂ , Yiling Yu ₁ , Ti Wang ₁ , Hongxing Xu _{1,

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Affiliation

The modulation of energy transfer processes in transition metal dichalcogenide heterostructures signifies a promising avenue for the precise control of energy distribution and flow at the nanoscale. Typically, in type-II heterostructures, energy transfer is overshadowed by ultrafast charge processes. However, in this study, the manipulation of an energy transfer process in the MoS₂/WS₂ heterostructure has been accomplished through the introduction of a resonant state. By employing optical techniques with energy, temporal, and spatial resolutions, we discern both charge and additional energy transfer processes. The energy transfer is ascribed to the resonant energy alignment between the WS₂ A exciton and the newfound resonant state of MoS₂. Through the modulation of the energy of the resonant state, this study introduces a novel approach to fine-tune the energy transfer process. This endeavor not only sheds light on the fundamental mechanisms of charge and energy transfer at interfaces but also provides a straightforward yet robust method to regulate energy flow in type-II heterostructures. The findings bear significant implications for advancing the comprehension of these processes and offer practical insights for the development of electronic devices with tailored functionalities.

中文翻译：

II 型异质结构中能量传递过程的可调性

过渡金属二硫族化物异质结构中能量转移过程的调节为精确控制纳米尺度的能量分布和流动提供了一条有前途的途径。通常，在 II 型异质结构中，能量转移被超快充电过程所掩盖。然而，在这项研究中，MoS ₂ /WS ₂异质结构中能量转移过程的操纵是通过引入共振态来完成的。通过采用具有能量、时间和空间分辨率的光学技术，我们可以识别电荷和附加能量转移过程。能量转移归因于WS ₂ A激子和新发现的MoS ₂共振态之间的共振能量排列。通过调制谐振态的能量，本研究引入了一种微调能量转移过程的新方法。这一努力不仅揭示了界面处电荷和能量转移的基本机制，而且提供了一种简单而稳健的方法来调节 II 型异质结构中的能量流。这些发现对于促进对这些过程的理解具有重要意义，并为开发具有定制功能的电子设备提供了实用的见解。

更新日期：2024-08-30

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