Ultrafast Interlayer Charge Transfer between Bilayer PtSe2 and Monolayer WS2
Source abstract
Abstract
Interlayer charge transfer (CT) between PtSe2 and WS2 is studied experimentally. Layer-selective pump–probe and photoluminescence quenching measurements reveal ultrafast interlayer CT in the heterostructure formed by bilayer PtSe2 and monolayer WS2, confirming its type-II band alignment. The CT facilitates the formation of the interlayer excitons with a lifetime of several hundred ps to 1 ns, a diffusion coefficient of 0.9 cm2 s–1, and a diffusion length reaching 200 nm. These results demonstrate the integration of PtSe2 with other materials in van der Waals heterostructures with novel charge-transfer properties and help develop fundamental understanding on the performance of various optoelectronic devices based on heterostructures involving PtSe2.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: 2D Materials and Applications · Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China
Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
Department of Physics and Astronomy, The University of Kansas, Lawrence, Kansas 66045, United States
Funding
Ministry of Education of the People's Republic of China · Basic Energy Sciences · Natural Science Foundation of Beijing Municipality · National Natural Science Foundation of China
References (69)
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