Photovoltaic Effect in an Electrically Tunable van der Waals Heterojunction

By Marco M. Furchi, A. Pospischil, F. Libisch, J. Burgdörfer, Thomas Mueller. Nano letters (Print), 2014

1,038 citations recorded by the source corpus.

Semiconductor heterostructures form the cornerstone of many electronic and optoelectronic devices and are traditionally fabricated using epitaxial growth techniques. More recently, heterostructures have also been obtained by vertical stacking of two-dimensional crystals, such as graphene and related two-dimensional materials. These layered designer materials are held together by van der Waals forces and contain atomically sharp interfaces. Here, we report on a type-II van der Waals heterojunction made of molybdenum disulfide and tungsten diselenide monolayers. The junction is electrically tunable, and under appropriate gate bias an atomically thin diode is realized. Upon optical illumination, charge transfer occurs across the planar interface and the device exhibits a photovoltaic effect. Advances in large-scale production of two-dimensional crystals could thus lead to a new photovoltaic solar technology.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/db63722f88785e7bc49ab95be2d29c4096fef3a9

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atomic and Molecular Physics, and Optics

1. Xiaodong Xu
2. Hongyi Yu
3. W. Yao
4. Fengnian Xia
5. A. Di Bartolomeo
6. E. Malic

In Materials Chemistry

1. A. Di Bartolomeo
2. Hongyi Yu
3. W. Yao
4. E. Malic
5. Xiaodong Xu
6. Thomas Mueller
7. Fengnian Xia
8. X. Cui

Citations in the corpus

• Graphene Schottky diodes: an experimental review of the rectifying graphene/semiconductor heterojunction (2015, background): “Although research on vdWHs is at its beginning and many unique properties as well as fundamental issues are still unclear and need to be addressed, such heterojunctions have been already demonstrated as competitive pn junctions [250][251] [252], vertical [253] and tunneling [254] FETs, photodetector”
• The hot pick-up technique for batch assembly of van der Waals heterostructures (2016, neutral): “…at 110 (cid:2) C on the graphene surface allows them to diffuse across the surface of the 2D materials, away from the vdWs contact front which proceeds in a controlled way across the surface of the flakes during assembly, and appears to gather at the edges of flakes (Supplementary Movie 4) 22 .”