Dziobek-Garrett Reynolds, Kempa Thomas J
Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, USA.
Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA.
J Chem Phys. 2024 May 28;160(20). doi: 10.1063/5.0206417.
Van der Waals heterostructures (vdWHs) of vertically stacked two-dimensional (2D) atomic crystals have been used to elicit intriguing phenomena stemming from strong electronic correlations, magnetic textures, and interlayer excitons spawned at the heterointerface. However, vdWHs comprised of heterointerfaces between these 2D atomic crystal lattices and molecular assemblies are emerging as equally intriguing platforms supporting properties to be harnessed for photovoltaic energy conversion, photodetection, spin-selective charge injection, and quantum emission. In this perspective, we summarize recent research examining exciton dynamics in heterostructures between semiconducting 2D transition metal dichalcogenides and molecular organic semiconductors. We discuss methods for assembly of these heterostructures, the nature of interlayer or charge-transfer excitons at transition-metal dichalcogenide (TMD)-molecule interfaces, explicit exciton transfer between organics and TMDs, and other interfacial phenomena driven by the merger of these two material classes. We also suggest key new research directions extending the remit of these 2D atomic-molecular lattice heterointerfaces into the domains of condensed matter physics, quantum sensing, and energy conversion.
垂直堆叠的二维（2D）原子晶体的范德华异质结构（vdWHs）已被用于引发源自强电子关联、磁纹理以及在异质界面产生的层间激子的有趣现象。然而，由这些二维原子晶格与分子组装体之间的异质界面组成的vdWHs正成为同样引人入胜的平台，其支持的特性可用于光伏能量转换、光电探测、自旋选择性电荷注入和量子发射。从这个角度出发，我们总结了近期关于研究半导体二维过渡金属二卤化物与分子有机半导体之间异质结构中激子动力学的研究。我们讨论了这些异质结构的组装方法、过渡金属二卤化物（TMD）-分子界面处层间或电荷转移激子的性质、有机物与TMDs之间明确的激子转移以及由这两类材料合并驱动的其他界面现象。我们还提出了关键的新研究方向，将这些二维原子-分子晶格异质界面的研究范围扩展到凝聚态物理、量子传感和能量转换领域。
