Navigation Links
Advance brings low-cost, bright LED lighting closer to reality
Date:7/17/2008

e deposition of aluminum nitride and zirconium nitride onto the silicon surface. The gallium nitride was then deposited by another common technique known as organometallic vapor phase epitaxy, performed in a chamber, called a reactor, at temperatures of about 1,000 degrees Celsius, or 1,800 degrees Fahrenheit.

As the zirconium nitride, aluminum nitride and gallium nitride are deposited on the silicon, they arrange themselves in a crystalline structure matching that of silicon.

"We call this epitaxial growth, or the ordered arrangement of atoms on top of the substrate," Sands said. "The atoms travel to the substrate, and they move around on the silicon until they find the right spot."

This crystalline formation is critical to enabling the LEDs to perform properly.

"It all starts with silicon, which is a single crystal, and you end up with gallium nitride that's oriented with respect to the silicon through these intermediate layers of zirconium nitride and aluminum nitride," Sands said. "If you just deposited gallium nitride on a glass slide, for example, you wouldn't get the ordered crystalline structure and the LED would not operate efficiently."

Using silicon will enable industry to "scale up" the process, or manufacture many devices on large wafers of silicon, which is not possible using sapphire. Producing many devices on a single wafer reduces the cost, Sands said.

Another advantage of silicon is that it dissipates heat better than sapphire, reducing damage caused by heating, which is likely to improve reliability and increase the lifetime of LED lighting, Oliver said.

The widespread adoption of solid-state lighting could have a dramatic impact on energy consumption and carbon emissions associated with electricity generation since about one-third of all electrical power consumed in the United States is from lighting.

"If you replaced existing lighting with solid-state lighting, following som
'/>"/>

Contact: Emil Venere
venere@purdue.edu
765-494-4709
Purdue University
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. China Biologic Products Honored with the Advanced Technology Certification for Foreign-Funded Enterprises
2. Cynosure Introduces Affirm CO2(TM) Workstation for Advanced Ablative Therapy
3. Advanced Life Sciences Announces Collaboration With UK Ministry of Defence on ALS-886
4. U.S. Genomics Awarded $9.1 Million Contract for Development of Advanced Biosensor by the U.S. Department of Homeland Security
5. Video: New, Advanced Therapy Program Helps People Who Stutter Acquire Fluent Speech
6. Will New Technological Advances Offer Fresh Capabilities for Commercialization and Enhance BTL Investments?
7. Ardea Biosciences Advances RDEA806 Into Phase 2a Proof-of-Concept Study for Gout
8. NorthPoint Domain and Boston Medical Center Partner to Apply Advanced Patient Engagement Instruments to Pioneering Cardiac Robotic Surgery Program
9. Advanced Life Sciences Added to Russell Microcap Index
10. Culligan's New Aqua-Cleer Advanced Drinking Water SystemProvides Clean, Quality Water Customized for Every Home
11. SACHEM Launches New Products for High Purity Advanced Ceramic Powders : Avanta AC™ Advanced Ceramics Solutions Offer Unique Advantages over Inorganic Bases in the Manufacture of Advanced Ceramic Nanoparticles
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Advance brings low-cost, bright LED lighting closer to reality
(Date:8/28/2015)... - RepliCel Life Sciences Inc. (OTCQB: REPCF) (TSXV: ... the development of autologous cell therapies, today reported ... 2015, corporate highlights, and near-term milestones.  The company,s ... www.sedar.com ,  www.edgar.com and at ... to launch its RCS-01 treatment for aging and ...
(Date:8/27/2015)... 27, 2015  Neogen Corporation (NASDAQ: NEOG ) ... United Kingdom -based Lab M Holdings, ... and diagnostic systems. Lab M was ... provider of microbial testing and diagnostic products for the ... company currently sells into more than 70 countries worldwide, ...
(Date:8/27/2015)... DIEGO , Aug. 27, 2015 HUYA ... annual meeting of the Japan Society of HTLV-1, held ... Institute Auditorium. The purpose of the Society is to ... as the development of medical technology and research related ... and welfare. "HUYA is proud to support ...
(Date:8/27/2015)... Irvine, CA (PRWEB) , ... August 27, 2015 ... ... leader in Personalized Medicine, recently presented new data on the relationship of genetics ... 2015 20th World Congress on Heart Disease in Vancouver, British Columbia, Canada. The ...
Breaking Biology Technology:RepliCel Reports Second Quarter 2015 Financial Results 2RepliCel Reports Second Quarter 2015 Financial Results 3RepliCel Reports Second Quarter 2015 Financial Results 4RepliCel Reports Second Quarter 2015 Financial Results 5Neogen acquires U.K.-based Lab M Holdings 2HUYA Bioscience International Sponsors Japan Society Of HTLV-1 Annual Meeting 2HUYA Bioscience International Sponsors Japan Society Of HTLV-1 Annual Meeting 3HUYA Bioscience International Sponsors Japan Society Of HTLV-1 Annual Meeting 4Proove Biosciences Presents Ground-Breaking Data on Genetics and Heart Disease at 20th World Congress on Heart Disease 2Proove Biosciences Presents Ground-Breaking Data on Genetics and Heart Disease at 20th World Congress on Heart Disease 3
... Vical Incorporated,(Nasdaq: VICL ) presentation at the ... at 1 p.m. Eastern Daylight Time, will be ... page at http://www.vical.com ., About Vical, ... on its,patented DNA delivery technologies for the prevention ...
... - Oncentra(R) RT Viewer* Officially to Launch ... ASTRO 2008, Boston, USA, September,21-24, Nucletron, a ... release of Oncentra RT Viewer. This unique innovation,in ... review,radiotherapy plans that are generated with a wide ...
... significant partial onset seizure reduction, proven ... - Keppra XR(TM) is ... press release, regulated information:,UCB announced today that the U.S. Food ... for use as,an add-on to other antiepileptic treatments for people ...
Cached Biology Technology:Vical to Present at UBS Global Life Sciences Conference 2Nucletron Announces Market Release of First Commercially Available Software to Review and Share Dicom-Based Treatment Plans for Radiotherapy 2Video: Keppra XR(TM) Approved in the U.S. 2Video: Keppra XR(TM) Approved in the U.S. 3Video: Keppra XR(TM) Approved in the U.S. 4
(Date:8/17/2015)... 2015  NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" ... the growing mobile commerce market and creator of the ... Q4 2015. The new marketing campaign is being spearheaded ... Marketing Group ( http://amplitudemarketing.com/ ) and TPMG ( http://tmpg.com/ ... in retail driven marketing and brand awareness and has ...
(Date:8/11/2015)... Today, ZUK announced its Android smartphone Z1, featuring FPC,s ... in 2015 that relate to sales of FPC1155 for this smartphone ... MSEK for 2015. Jörgen Lantto, CEO of FPC, comments: ... smartphone manufacturer in China and we are ... for Z1 , its ...
(Date:8/6/2015)... , Aug. 6, 2015 Synaptics ... of human interface solutions, today announced collaboration with ... on Windows 10. Microsoft leveraged Synaptics, deep expertise ... operating system. Through stringent testing, ... fully certified with Microsoft,s Precision TouchPad (PTP) specification ...
Breaking Biology News(10 mins):NXT-ID, Inc. Launches Sales Campaign for Wocket Smart Wallet with Award Winning Marketing Team 2NXT-ID, Inc. Launches Sales Campaign for Wocket Smart Wallet with Award Winning Marketing Team 3FPC's Touch Fingerprint Sensor FPC1155 in ZUK's Smartphone Z1 2Synaptics Chosen for Human Interface Co-Development on Windows 10 2
... Va.Rear Adm. Matthew Klunder, the chief of naval research, told ... science and technology (S&T) conference this week that he intends ... academia together on a quarterly basis, starting in 2013, to ... conference every two years, which is phenomenal and very valuableand ...
... , BioFrontiers Institute scientists at the University of Colorado Boulder, ... anti-cancer drug development that is sitting at the ends of ... collaborated to find a patch of amino acids that, if ... this location, may prevent cancerous cells from reproducing. The amino ...
... BEDFORD, Mass., Sept. 21, 2012 Aware, Inc. (NASDAQ: ... completed the sale (as previously announced on August 23, ... Delta, LLC for US $16,000,000.00.  The patents and patent ... of our patent management operation,s efforts to sell and/or ...
Cached Biology News:In an uncertain world, Navy needs science and technology collaboration, chief says 2CU-Boulder researchers uncover new target for cancer research 2Aware Announces Closing Of Sale Of Selected Patents 2Aware Announces Closing Of Sale Of Selected Patents 3
... Peptide Antigen Design , Customer Peptide Synthesis , 20 ... 90% , 20 mg will return to customer for ... x 2 , Maintenance 102 days/each ... Immunizations/Boost injections x5 /each , Test bleed ...
Request Info...
... Immunogen: Synthetic peptide derived from ... junctophilin-1. Specificity: Specific for the ... controls: mouse brain and skeletal muscle ... muscle tissues). Applications: Western blotting ...
... R&D Systems adds two new Stem Cell ... stem cell products. The Human Embryonic Stem ... contains the antibodies against: alkaline phosphatase, Nanog, ... Stem Cell Marker Antibody Panel Plus (Catalog ...
Biology Products: