Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Changing a 2D material's symmetry can unlock its promise: Jian Shi Research Group engineers material into promising optoelectronic

Deforming MoS2 leads to the observation of the flexo-photovoltaic effect. Image credit: Jie Jiang, Jian Shi
Deforming MoS2 leads to the observation of the flexo-photovoltaic effect. Image credit: Jie Jiang, Jian Shi

Abstract:
Optoelectronic materials that are capable of converting the energy of light into electricity, and electricity into light, have promising applications as light-emitting, energy-harvesting, and sensing technologies. However, devices made of these materials are often plagued by inefficiency, losing significant useful energy as heat. To break the current limits of efficiency, new principles of light-electricity conversion are needed.

Changing a 2D material's symmetry can unlock its promise: Jian Shi Research Group engineers material into promising optoelectronic

Troy, NY | Posted on June 18th, 2021

For instance, many materials that exhibit efficient optoelectronic properties are constrained by inversion symmetry, a physical property that limits engineers' control of electrons in the material and their options for designing novel or efficient devices. In research published today in Nature Nanotechnology, a team of materials scientists and engineers, led by Jian Shi, an associate professor of materials science and engineering at Rensselaer Polytechnic Institute, used a strain gradient in order to break that inversion symmetry, creating a novel optoelectronic phenomenon in the promising material molybdenum disulfide (MoS2) -- for the first time.

To break the inversion symmetry, the team placed a vanadium oxide (VO2) wire underneath a sheet of MoS2. Molybdenum disulfide is a flexible material, Shi said, so it deformed its original shape to follow the curve of the VO2 wire, creating a gradient within its crystal lattice. Imagine what would happen if you placed a piece of paper over a pencil that was sitting on a table. The varied tension created in the paper is like the strain gradient formed in the MoS2 lattice.

That gradient, Shi said, breaks the material's inversion symmetry and allows electrons traveling within the crystal to be manipulated. The unique photo-response observed near the strain gradient allows a current to flow through the material. It's known as the flexo-photovoltaic effect, and it could be harnessed to design novel and/or high-efficiency optoelectronics.

"This is the first demonstration of such an effect in this material," Shi said. "If we have a solution that does not create heat during photon-electricity conversion, then the electronic devices or circuits could be improved."

Vanadium oxide is very sensitive to temperature, so the team was also able to demonstrate that the flexo-photovoltaic effect brought about temperature dependence at the site where the MoS2 and VO2 materials meet -- changing the lattice's gradient accordingly.

"This discovery suggests a novel principle that could be used for remote thermal sensing," said Jie Jiang, a postdoctoral research fellow in Shi's lab and the first author on this paper.

What the team was able to demonstrate here, Shi said, not only shows great promise for this material, but also suggests the potential of using such an approach in engineering other materials with favorable optoelectronic properties that are plagued by inversion symmetry.

####

About Rensselaer Polytechnic Institute
Founded in 1824, Rensselaer Polytechnic Institute is America's first technological research university. Rensselaer encompasses five schools, 32 research centers, more than 145 academic programs, and a dynamic community made up of more than 7,600 students and over 100,000 living alumni. Rensselaer faculty and alumni include more than 145 National Academy members, six members of the National Inventors Hall of Fame, six National Medal of Technology winners, five National Medal of Science winners, and a Nobel Prize winner in Physics. With nearly 200 years of experience advancing scientific and technological knowledge, Rensselaer remains focused on addressing global challenges with a spirit of ingenuity and collaboration.

For more information, please click here

Contacts:
Torie Wells

518-276-3247

@rpinews

Copyright © Rensselaer Polytechnic Institute

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

RELATED JOURNAL ARTICLE:

Related News Press

News and information

Daikin Industries becomes OCSiAl shareholder July 27th, 2021

The National Space Society Congratulates Blue Origin and Jeff Bezos for the Spectacular First Crewed Flight of the New Shepard: Well-Tested Suborbital Tourist Rocket Soars to 63 Miles; Opens New Frontiers July 21st, 2021

Unconventional superconductor acts the part of a promising quantum computing platform: If it looks like a duck, swims like a duck and quacks like a duck, then it probably is a duck. July 16th, 2021

Unlocking efficient light-energy conversion with stable coordination nanosheets: Scientists design a high-performance, self-powered, UV photodetector using 2D nanosheets that show record photocurrent stability under air exposure July 16th, 2021

2 Dimensional Materials

Putting functional proteins in their place: Using DNA-based assembly, scientists developed a method for creating designed and biologically active 2-D and 3-D protein arrays, which show promise for applications in structural biology, biomaterials, nanomedicine, and biocatalysis June 25th, 2021

Atomic-scale tailoring of graphene approaches macroscopic world June 18th, 2021

Rice lab peers inside 2D crystal synthesis: Simulations could help molecular engineers enhance creation of semiconducting nanomaterials June 11th, 2021

Hexagonal boron nitride's remarkable toughness unmasked: 2D material resists cracking and description by century-old theory of fracture mechanics June 2nd, 2021

Possible Futures

Daikin Industries becomes OCSiAl shareholder July 27th, 2021

The National Space Society Congratulates Blue Origin and Jeff Bezos for the Spectacular First Crewed Flight of the New Shepard: Well-Tested Suborbital Tourist Rocket Soars to 63 Miles; Opens New Frontiers July 21st, 2021

Scientists take first snapshots of ultrafast switching in a quantum electronic device: They discover a short-lived state that could lead to faster and more energy-efficient computing devices July 16th, 2021

Researchers discover a new inorganic material with lowest thermal conductivity ever reported July 16th, 2021

Discoveries

Repairs using light signals: FAU research group develops smart microparticle that identifies defective parts in electrical appliances July 16th, 2021

Removing the lead hazard from perovskite solar cells July 16th, 2021

Scientists create rechargeable swimming microrobots using oil and water July 16th, 2021

Scientists take first snapshots of ultrafast switching in a quantum electronic device: They discover a short-lived state that could lead to faster and more energy-efficient computing devices July 16th, 2021

Announcements

Daikin Industries becomes OCSiAl shareholder July 27th, 2021

The National Space Society Congratulates Blue Origin and Jeff Bezos for the Spectacular First Crewed Flight of the New Shepard: Well-Tested Suborbital Tourist Rocket Soars to 63 Miles; Opens New Frontiers July 21st, 2021

Scientists take first snapshots of ultrafast switching in a quantum electronic device: They discover a short-lived state that could lead to faster and more energy-efficient computing devices July 16th, 2021

Researchers discover a new inorganic material with lowest thermal conductivity ever reported July 16th, 2021

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

RUDN University chemists obtained an unusual planar nickel complex exhibiting magnetic properties July 16th, 2021

Repairs using light signals: FAU research group develops smart microparticle that identifies defective parts in electrical appliances July 16th, 2021

Scientists create rechargeable swimming microrobots using oil and water July 16th, 2021

Scientists take first snapshots of ultrafast switching in a quantum electronic device: They discover a short-lived state that could lead to faster and more energy-efficient computing devices July 16th, 2021

Energy

Removing the lead hazard from perovskite solar cells July 16th, 2021

Researchers discover a new inorganic material with lowest thermal conductivity ever reported July 16th, 2021

Pushing the boundaries of colloidal quantum dots by making their sizes equal: Scientists demonstrate the relationship between optoelectronic performance and size uniformity in perovskite colloidal quantum dots June 25th, 2021

Light-harvesting nanoparticle catalysts show promise in quest for renewable carbon-based fuels June 25th, 2021

Solar/Photovoltaic

Removing the lead hazard from perovskite solar cells July 16th, 2021

Molecular coating enhances organic solar cells June 11th, 2021

New form of silicon could enable next-gen electronic and energy devices: Novel crystalline form of silicon could potentially be used to create next-generation electronic and energy devices June 4th, 2021

Researchers build structured, multi-part nanocrystals with super light-emitting properties May 28th, 2021

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project