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以二硫化钼(MoS_2)为代表的二维过渡金属硫属化合物(TMDs)具有随厚度/层数变化的光学和电学性质,并且展示出独特的激子效应和较高的光学量子产率,在光电子器件中具有很好的应用前景。近年来,基于TMDs材料的光学性质和光电子器件的研究进展迅速,如通过电场、化学掺杂、缺陷等方式实现了对其光致发光(PL)的调控,并极大地提高了PL发射量子产率;基于TMDs边带异质结和垂直异质结的LEDs被广泛研究并获得了较高的光发射效率;以TMDs作为增益介质,并将其与微盘、光子晶体空腔等耦合实现了低阈值激光发射。从TMDs的结构和光学性质出发,总结了TMDs材料PL的调控手段及效果,并介绍TMDs中激光发射的研究进展,最后对基于TMDs的激光发展进行了展望。
Two-dimensional transition metal chalcogenides (TMDs), represented by molybdenum disulfide (MoS 2), have optical and electrical properties that vary with thickness / layer number and exhibit unique exciton effect and high optical quantum yield, In optoelectronic devices have a good prospect. In recent years, the research on the optical properties and optoelectronic devices based on TMDs has been rapidly progressed. For example, the PL control is controlled by electric field, chemical doping and defects, and the PL emission quantum yield The LEDs based on TMDs with side-band heterojunction and vertical heterojunction are widely studied and get higher light-emitting efficiency. Taking TMDs as the gain medium and coupling with the microdisks and photonic crystal cavities, low Threshold laser emission. Based on the structure and optical properties of TMDs, the regulation methods and effects of TMDs PL were summarized. The research progress of TMDs laser emission was summarized. Finally, the development of TMDs based laser was prospected.