异质结
激子
极化(电化学)
材料科学
光致发光
光电子学
极化率
光学
凝聚态物理
物理
化学
分子
量子力学
物理化学
作者
Shaofei Li,Haihong Zheng,Biao Wu,Junnan Ding,jun He,Liu Zongwen,Yanping Liu
摘要
In this work, we investigate the polarization of the excitonics valley in MoS2–WS2 heterostructures using circular polarization-resolved photoluminescence. The valley polarization is the largest (≈28.45%) in the 1L–1L MoS2–WS2 heterostructure and the polarizability of AWS2 decreases as the number of WS2 layers increases. We further observed a redshift of exciton XMoS2− in MoS2–WS2 heterostructures with the increase of WS2 layers, which is attributed to the displacement of the MoS2 band edge, indicating the layer-sensitive optical properties of the MoS2–WS2 heterostructure. Our findings shed light on the understanding of exciton behavior in multilayer MoS2–WS2 heterostructures that may promote their potential applications in optoelectronic devices.
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