Ultrafast Interlayer Charge Transfer between Bilayer PtSe2 and Monolayer WS2
Journal Article
·
· ACS Applied Materials and Interfaces
- Beijing Jiaotong Univ. (China); The University of Kansas
- Beijing Jiaotong Univ. (China)
- Songshan Lake Materials Lab., Guangdong (China)
- Beijing Univ. of Chemical Technology (China)
- Univ. of Kansas, Lawrence, KS (United States)
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. Furthermore, 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.
- Research Organization:
- Univ. of Kansas, Lawrence, KS (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- Grant/Contract Number:
- SC0020995
- OSTI ID:
- 1864724
- Journal Information:
- ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Journal Issue: 48 Vol. 13; ISSN 1944-8244
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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