Ultrafast Photophysics of 2D Semiconductors and Related Heterostructures

被引:50
作者
Dal Conte, Stefano [1 ]
Trovatello, Chiara [1 ]
Gadermaier, Christoph [1 ,2 ]
Cerullo, Giulio [1 ,3 ]
机构
[1] Politecn Milan, Dept Phys, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy
[2] Italian Inst Technol, Ctr Nano Sci & Technol, Via Pascoli 70-3, I-20133 Milan, Italy
[3] IFN CNR, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy
基金
欧盟地平线“2020”;
关键词
PHOTOINDUCED BANDGAP RENORMALIZATION; CARRIER DYNAMICS; CHARGE-TRANSFER; 2-DIMENSIONAL MATERIALS; VALLEY POLARIZATION; EXCITON FORMATION; MONOLAYER MOS2; SPIN; GRAPHENE; OPTOELECTRONICS;
D O I
10.1016/j.trechm.2019.07.007
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Atomically thin transition-metal dichalcogenides (TMDs) exhibit strong light-matter interaction and pronounced excitonic behavior. Understanding the nonequilibrium dynamical processes of photoexcited carriers in such materials is a key step in view of their technological applications. Here, we review the ultrafast photophysics of 2D TMDs and related heterostructures (HSs) measured by femtosecond optical spectroscopy. First, we provide a general introduction on the physics of the materials and a brief explanation of the ultrafast optical techniques. Then we discuss the physical processes governing their nonequilibriumoptical response, with a particular emphasis on the intervalley scattering dynamics, and the charge-transfer processes in 2D HSs. We conclude by discussing open issues and perspectives for future experiments.
引用
收藏
页码:28 / 42
页数:15
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