In todays increasingly powerful electronics, tiny materials are a must as manufacturers seek to increase performance without adding bulk. Smaller is also better for optoelectronic deviceslike camera sensors or solar cellswhich collect light and convert it to electrical energy.
This image shows the different layers of the nanoscale photodetector, including germanium (red) in between layers of gold or aluminum (yellow) and aluminum oxide (purple). The bottom layer is a silver substrate. (Credit: U. Buffalo)
(Click to enlarge)
Think, for example, about reducing the size and weight of a series of solar panels, producing a higher-quality photo in low lighting conditions, or even transmitting data more quickly.
However, two major challenges have stood in the way: First, shrinking the size of conventionally used amorphous thin-film materials also reduces their quality. And second, when ultrathin materials become too thin, they are almost transparentand actually lose some ability to gather or absorb light.
The new nanoscale light detector, a single-crystalline germanium nanomembrane photodetector on a nanocavity substrate, could overcome both of these obstacles. Related:Russian Energy Minister: No Additional Output Cuts Are Needed
Weve created an exceptionally small and extraordinarily powerful device that converts light into energy, says Qiaoqiang Gan, associate professor of electrical engineering in the University at Buffalos School of Engineering and Applied Sciences and one of the papers lead authors. The potential applications are exciting because it could be used to produce everything from more efficient solar panels to more powerful optical fibers.
The idea, basically, is you want to use a very thin material to realize the same function of devices in which you need to use a very thick material, says Zhenqiang (Jack) Ma, professor in electrical and computer engineering at University of Wisconsin-Madison, also a lead author.
Nanocavities are made up of an orderly series of tiny, interconnected molecules that essentially reflect, or circulate, light.
The new device is an advancement of Gans work developing nanocavities that increase the amount of light that thin semiconducting materials like germanium can absorb. It consists of nanocavities sandwiched between a top layer of ultrathin single-crystal germanium and a bottom, reflecting layer of silver.
Because of the nanocavities, the photons are recycled so light absorption is substantially increasedeven in very thin layers of material, says Ma.
However, most germanium thin films begin as germanium in its amorphous formmeaning that the materials atomic arrangement lacks the regular, repeating order of a crystal. That also means that its quality isnt sufficient for increasingly smaller optoelectronics applications.
An expert in semiconductor nanomembrane devices, Ma used a revolutionary membrane-transfer technology that allows him to easily integrate single crystalline semiconducting materials onto a substrate.
The result is a very thin, yet very effective light-absorbing photodetectora building block for the future of optoelectronics. Related:Halliburton Sees Oil Price Spike By 2020
It is an enabling technology that allows you to look at a wide variety of optoelectronics that can go to even smaller footprints, smaller sizes, says Zongfu Yu, who conducted its computational analysis for the project.
While the researchers demonstrated their advance using a germanium semiconductor, they can also apply their method to other semiconductors. And importantly, by tuning the nanocavity, we can control what wavelength we actually absorb, says Gan. This will open the way to develop lots of different optoelectronic devices.
The researchers are applying jointly for a patent on the technology through the Wisconsin Alumni Research Foundation.
A paper describing the research appears in the journalScience Advances.Additional coauthors of the paper are from the University at Buffalo, the University of Wisconsin-Madison, and Yale University. The National Science Foundation partially supported this research.
By Futurity
More Top Reads From Oilprice.com:
See the rest here:
New Nano Light Detector Could Change Solar Panels Forever - OilPrice.com
- Micro Manufacturing - November 8th, 2009 [November 8th, 2009]
- Modeling and Simulation - November 8th, 2009 [November 8th, 2009]
- Electron Microscopy - November 8th, 2009 [November 8th, 2009]
- Metrology - November 8th, 2009 [November 8th, 2009]
- Calibration Services - November 8th, 2009 [November 8th, 2009]
- Micro Engineering - November 8th, 2009 [November 8th, 2009]
- Nanotechnology - November 8th, 2009 [November 8th, 2009]
- Creating nano-structures from the bottom up - April 25th, 2012 [April 25th, 2012]
- Wichita State hands out new round of high-tech grants - April 25th, 2012 [April 25th, 2012]
- URI Engineering Student Develops Self Healing Concrete - Video - May 4th, 2012 [May 4th, 2012]
- NYS Senator Joseph A. Griffo Visits Clarkson University Nanoengineering - May 4th, 2012 [May 4th, 2012]
- Nano-subs built to grab and move oil spills - May 5th, 2012 [May 5th, 2012]
- Video: N.Y. lab creating jobs with nano-technology - May 5th, 2012 [May 5th, 2012]
- Nano-Subs Grab and Move Oil Spills - May 5th, 2012 [May 5th, 2012]
- University of Toronto Engineering Welcomes New NSERC Chair in Multidisciplinary Design - May 5th, 2012 [May 5th, 2012]
- Nano-Sensors for Explosive Detection -- University Collaboration Addresses Challenges in Explosive Detection - May 10th, 2012 [May 10th, 2012]
- Obama, Cuomo touring Nano college - May 10th, 2012 [May 10th, 2012]
- Obama, Cuomo bond over vision of economic future - May 10th, 2012 [May 10th, 2012]
- Kids visit Nano College after Obama - May 10th, 2012 [May 10th, 2012]
- Zyvex Technologies and ENVE Composites Introduce the World's First Nano-Enhanced Carbon Fiber ... - May 16th, 2012 [May 16th, 2012]
- Listen Now - May 16th, 2012 [May 16th, 2012]
- To Czech Industry, Everything Is Nano - May 23rd, 2012 [May 23rd, 2012]
- Availability of hydrogen controls chemical structure of graphene oxide - May 23rd, 2012 [May 23rd, 2012]
- Hydrogen Controls Chemical Structure of Graphene Oxide - May 23rd, 2012 [May 23rd, 2012]
- Shocking Technologies Raises Additional $10.5 Million From Circuit Protection Leader Littelfuse - May 23rd, 2012 [May 23rd, 2012]
- Nano-structured polymer-based materials from scrap - May 25th, 2012 [May 25th, 2012]
- Journal Tips from the American Institute of Physics: May 24, 2012 - May 25th, 2012 [May 25th, 2012]
- Synthetic nano-waste does not disappear - May 25th, 2012 [May 25th, 2012]
- Attacks on Nuclear and Nano Science - May 29th, 2012 [May 29th, 2012]
- Graphene quantum dots and nano-ribbons cleaved from graphene sheets - May 30th, 2012 [May 30th, 2012]
- Girls Inc.and SEFCU to provide internships at Nano College - May 31st, 2012 [May 31st, 2012]
- Nano technology improves health field - June 2nd, 2012 [June 2nd, 2012]
- Tiny satellites will use Kinect to dock with one another - June 4th, 2012 [June 4th, 2012]
- New nano-research leads to sensors that detect contaminants in water - June 6th, 2012 [June 6th, 2012]
- Editorial: State sets example on economy, bipartisanship - June 6th, 2012 [June 6th, 2012]
- MP girl ‘Gargi Pare’ brings laurels to State - June 6th, 2012 [June 6th, 2012]
- Element Six and Harvard University Collaboration on Nano-Engineered Synthetic Diamond Sets a New Quantum Information ... - June 8th, 2012 [June 8th, 2012]
- Business at a glance - June 10th, 2012 [June 10th, 2012]
- Inter American University of Puerto Rico Chooses Nanoprofessor as Foundation for New Nanoscience Education Program - June 11th, 2012 [June 11th, 2012]
- Nanoparticles found in moon glass bubbles explain weird lunar soil behaviour - June 13th, 2012 [June 13th, 2012]
- Nanoparticles found in moon glass bubbles explain weird lunar soil behavior - June 13th, 2012 [June 13th, 2012]
- Nanoparticles can solve mystery of Moon's topsoil - June 13th, 2012 [June 13th, 2012]
- Nano-Technologies Extended to Coax - June 15th, 2012 [June 15th, 2012]
- Shocking Technologies Raises Additional $10.5M From Circuit Protection Leader Littelfuse - June 15th, 2012 [June 15th, 2012]
- NIT-T professor gets over Rs. 2.15 crore to stall erosion in pipes - June 18th, 2012 [June 18th, 2012]
- Northeastern University Nanomanufacturing Center Director Ahmed Busnaina to Present Webinar on “The Democratization of ... - June 19th, 2012 [June 19th, 2012]
- NIT Silchar convocation - June 19th, 2012 [June 19th, 2012]
- Research and Markets: Government Initiative and High R&D Activities Drive the Nanotechnology Market in India - June 19th, 2012 [June 19th, 2012]
- Scientist unlocks the quantum secrets of the moon's bizarre soil, which hangs suspended above the surface when touched - June 20th, 2012 [June 20th, 2012]
- Nano-infused paint can detect strain - June 22nd, 2012 [June 22nd, 2012]
- "Proceedings of the IEEE" Hosts Centennial Engineering Innovation Forum in DC to Unveil Advanced Technologies ... - June 22nd, 2012 [June 22nd, 2012]
- Nanotech paint can show stress and strain - June 22nd, 2012 [June 22nd, 2012]
- Tatas developing an under $ 20,000 electric car - June 22nd, 2012 [June 22nd, 2012]
- Now, nano-infused paint to detect strain in buildings, bridges and airplanes - June 22nd, 2012 [June 22nd, 2012]
- Nano-sandwich technique slims down solar cells, improves efficiency - June 26th, 2012 [June 26th, 2012]
- Team develops world's most powerful nanoscale microwave oscillators - June 26th, 2012 [June 26th, 2012]
- UCLA-led research team develops world's most powerful nanoscale microwave oscillators - June 26th, 2012 [June 26th, 2012]
- Research and Markets: MEMS, NANO and Smart Systems - Selected papers from the 2011 7th International Conference on ... - June 27th, 2012 [June 27th, 2012]
- A step toward minute factories that produce medicine inside the body - June 28th, 2012 [June 28th, 2012]
- Green feel for collaboration with China - June 28th, 2012 [June 28th, 2012]
- Fibrous Protein Nanocomposites Conference - June 28th, 2012 [June 28th, 2012]
- Going For Gold: The Brains Behind Team GB - July 4th, 2012 [July 4th, 2012]
- NANO Connect Offers International Perspective With South Korean Nanotechnology Education Leader - October 4th, 2012 [October 4th, 2012]
- Hardide appoints a Business Development Manager - October 4th, 2012 [October 4th, 2012]
- Regenerative Medicine Biotech Company, Eqalix, Names Scientific Advisory Board - October 9th, 2012 [October 9th, 2012]
- Quinn uses nanotechnology summit to praise Wheeling High School - October 9th, 2012 [October 9th, 2012]
- Cal Poly Licenses CubeSat Technology to Tyvak Nano-Satellite Systems - October 11th, 2012 [October 11th, 2012]
- Improving nanometer-scale manufacturing with infrared spectroscopy - October 11th, 2012 [October 11th, 2012]
- KYOCERA Introduces New Milling Cutters For CNC Machining Featuring Inserts with Proprietary MEGACOAT NANO Technology - October 16th, 2012 [October 16th, 2012]
- iFixit opens up the new iPod nano - October 16th, 2012 [October 16th, 2012]
- Call to assess safety of nano particles - October 16th, 2012 [October 16th, 2012]
- Special Program at SPE ANTEC® Mumbai Will Focus on Nano-Scale Carbonaceous Materials - October 16th, 2012 [October 16th, 2012]
- NUS launches Aerospace Systems initiative for engineering students - October 30th, 2012 [October 30th, 2012]
- Life After MESA - University of California, San Diego - Video - October 30th, 2012 [October 30th, 2012]
- Toulouse, capitale européenne des nanotechnologies du 16 au 20 septembre 2012. - Video - October 30th, 2012 [October 30th, 2012]
- Techno Frühstück - Correspondence of Heart and Beat - Video - October 30th, 2012 [October 30th, 2012]
- CVTC Engineering Programs Commercial - Video - October 30th, 2012 [October 30th, 2012]
- DISSECTED FROG - BIOLOGY LAB FOR NANO ENGINEERING - Video - October 30th, 2012 [October 30th, 2012]
- Renault looking to build an upmarket rival to the Tata Nano, but it will still be very cheap - December 5th, 2012 [December 5th, 2012]
- 'Nano' opens at Discovery Museums - December 8th, 2012 [December 8th, 2012]