Monolayer WS2 Lateral Homosuperlattices with Two-dimensional Periodic Localized Photoluminescence.
Monolayer WS2 Lateral Homosuperlattices with Two-dimensional Periodic Localized Photoluminescence.
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DOI：
10.1021/acsnano.1c07803
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发表时间：
2021-12
期刊：
影响因子：
17.1
通讯作者：
Wanli Yang;Tiantian Huang;Junbo He;Shuaijun Zhang;Yan Yang;Weiming Liu;Xun Ge;Rui Zhang
中科院分区：
文献类型：
--
作者：
Wanli Yang;Tiantian Huang;Junbo He;Shuaijun Zhang;Yan Yang;Weiming Liu;Xun Ge;Rui Zhang
同质结和同质超晶格是基本结构，并且已经被广泛探索用于先进的电子和光电器件。然而，人工操纵二维（2D）单层中的晶相仍然具有挑战性，特别是当试图在过渡金属二硫属化物（TMD）的单个单层中设计横向均匀结时。在这里，我们展示了一个横向同质超晶格（MLHS）与交替的1T和2H域在二维WS2单层平面。在MLHS中，2H畴被威尔斯势阱横向局部化和隔离，在二维平面上表现出具有横向周期性分布的结界面和辐照光致发光（PL）。本文对多层超晶格的研究可以进一步理解单层平面内的横向同质结和同质超晶格，为调制TMD单层中的光电行为提供了一种新的途径。
Homojunctions and homosuperlattices are essential structures and have been widely explored for use in advanced electronic and optoelectronic devices. However, artificially manipulating crystalline phases in two-dimensional (2D) monolayers is still challenging, especially when attempting to engineer lateral homogeneous junctions in a single monolayer of transition metal dichalcogenides (TMDs). Herein, we demonstrate a lateral homosuperlattice (MLHS) with alternating 1T and 2H domains in a 2D WS2 monolayer plane. In MLHSs, the 2H domains, which are laterally localized and isolated by potential wells, manifest junction interfaces and irradiated photoluminescence (PL) with a lateral periodic distribution in the two-dimensional plane. The studies on MLHSs here can provide further understanding of lateral homojunctions and homosuperlattices in a monolayer plane, providing an alternative route to modulate optical and electronic behaviors in TMD monolayers.