Monolayer WS 2 Lateral Homosuperlattices with Two-dimensional Periodic Localized Photoluminescence

作者：Wanli Yang, Tiantian Huang, Junbo He, Shuaijun Zhang, Yan Yang, Weiming Liu, Xun Ge, Rui Zhang, Mengxia Qiu, Yuxiang Sang, Xingjun Wang, Xiaohao Zhou, Tianxin Li, Congfeng Liu, Ning Dai, Xin Chen, Zhiyong Fan, Guozhen Shen · 发表于：ACS Nano · 年份：2021 · DOI：10.1021/acsnano.1c07803 · 被引用次数：15 · 研究领域：2D Materials and Applications、Perovskite Materials and Applications、Graphene research and applications

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 WS 2 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.