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Repression of Interlayer Recombination by Graphene Generates a Sensitive Nanostructured 2D vdW Heterostructure Based Photodetector
- Source :
- Advanced Science, Vol 8, Iss 15, Pp n/a-n/a (2021), Advanced Science
- Publication Year :
- 2021
- Publisher :
- Wiley, 2021.
-
Abstract
- Great success in 2D van der Waals (vdW) heterostructures based photodetectors is obtained owing to the unique electronic and optoelectronic properties of 2D materials. Performance of photodetectors based 2D vdW heterojunctions at atomic scale is more sensitive to the nanointerface of the heterojunction than conventional bulk heterojunction. Here, a nanoengineered heterostructure for the first‐time demonstration of a nanointerface using an inserted graphene layer between black phosphorus (BP) and InSe which inhibits interlayer recombination and greatly improves photodetection performances is presented. In addition, a transition of the transport characteristics of the device is induced by graphene, from diffusion motion of minority carriers to drift motion of majority carriers. These two reasons together with an internal photoemission effect make the BP/G/InSe‐based photodetector have ultrahigh specific detectivity at room temperature. The results demonstrate that high‐performance vdW heterostructure photodetectors can be achieved through simple structural manipulation of the heterojunction interface on nanoscale.<br />A nanoscale interface engineering in which few‐layer graphene (G) is inserted into the interlayer of black phosphorus (BP)/InSe, forming a 2D BP/G/InSe van der Waals heterojunction, is introduced. Effective electron transfer from BP to InSe is facilitated by the insertion of G, which induces a better photoresponse performance of the BP/G/InSe device.
- Subjects :
- Materials science
Science
General Chemical Engineering
General Physics and Astronomy
Medicine (miscellaneous)
Photodetector
02 engineering and technology
Photodetection
Specific detectivity
black phosphorus
010402 general chemistry
01 natural sciences
Biochemistry, Genetics and Molecular Biology (miscellaneous)
Polymer solar cell
vdW heterostructures
law.invention
symbols.namesake
law
General Materials Science
Nanoscopic scale
Research Articles
sensitive photodetectors
Graphene
business.industry
graphene
General Engineering
Heterojunction
021001 nanoscience & nanotechnology
0104 chemical sciences
symbols
Optoelectronics
van der Waals force
interlayer recombination
0210 nano-technology
business
Research Article
Subjects
Details
- ISSN :
- 21983844
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- Advanced Science
- Accession number :
- edsair.doi.dedup.....973263322e5e53b4984e0791d4555d27