Journal
ACS NANO
Volume 13, Issue 12, Pages 14519-14528Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b08375
Keywords
two-dimensional; infrared optoelectronic device; gapless heterostructure; strong orbital hybridization; high performance
Categories
Funding
- National Key RAMP
- D Program of China [2018YFA0703700, 2016YFA0200700]
- National Natural Science Foundation of China [61851403, 61625401, 11674072, 61904055]
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication
- Youth Innovation Promotion Association CAS
Ask authors/readers for more resources
Mixed-dimensional van der Waals (vdW) heterostructures based on two-dimensional (2D) materials exhibit immense potential in infrared optoelectronic applications. However, the weak vdW coupling results in limiting performance of infrared optoelectronic device. Here, we exploit a gapless heterostructure that S dangling bonds of nonlayered PbS are connected to the bonding sites of MoS2 (with factitious S vacancies) via strong orbital hybridization. The strong interface coupling leads to ultrahigh responsivity and photogain (G) exceeding 10(5), and the detectivity (D*) is greater than 10(14) Jones. More importantly, the gapless heterostructure shows fast rise and decay times about 47 and 49 mu s, respectively, which is 5 orders of magnitude faster than that of transferred vdW heterostructures. Furthermore, an ultrahigh photon-triggered on/off ratio of 1.6 X 10(6) is achieved, which is 4 orders of magnitude higher than that of transferred vdW heterostructures. This architecture can offer an effective approach for advanced infrared optoelectronic devices.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available