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:8/31/2014)... Available spectra is similar for ... and cultivation of a wide range of plants. ... with proven patented and pending wide spectrum technology. ... in critical applications in contrast to growth spectra ... customers have a large variety of differently sized ...
(Date:8/29/2014)... Electronic circuits are based on electrons, but one of ... photonic circuits, i.e. circuits based on light (photons) instead ... to create a stream of single photons and control ... sorts of attempts to achieve this control, but now ... creating a steady stream of photons emitted one at ...
(Date:8/29/2014)... Hills, NY (PRWEB) August 29, 2014 ... Burnt Hills Veterinary Hospital are seeking candidates to participate ... dogs with osteoarthritis. The ultimate goal of this ... donor stem cells into one or two arthritically affected ... treated joints. , Candidates for the current investigational ...
(Date:8/28/2014)... USA (PRWEB) August 28, 2014 SPIE ... of Physics and Optical Science and Director of the ... of North Carolina at Charlotte, and co-founder and Chairman ... to serve as the 2015 Vice President of SPIE, ... 2014 President Philip Stahl announced recent election results at ...
Breaking Biology Technology:Breakthrough in light sources for new quantum technology 2Burnt Hills Veterinary Hospital Seeks Candidates for an Investigational Study of Stem Cells for Dogs with Arthritis 2Glenn Boreman, UNC Professor and Plasmonics Co-Founder, Elected to SPIE Presidential Chain 2
... Previous Quarter, NEW YORK, May 15 ... biosensor and microprocessor technologies for,use in portable monitoring ... ended March 31, 2008., Gross revenues for ... quarter 2007 gross revenues. The increase in revenues ...
... YORK, May 15 American Oriental,Bioengineering, Inc. (NYSE: ... health through the development, manufacture and commercialization,of a ... ("OTC") products in,China, today released the following statement ... with the many victims of China,s earthquake and ...
... 15 /Xinhua-PRNewswire-FirstCall/ -- Huifeng Bio-,Pharmaceutical Technology, Inc. ... producer of plant extracts and pharmaceutical raw ... production, today,announced that there was no damage ... the Sichuan Earthquake., Immediately following the ...
Cached Biology Technology:SPO Medical Reports First Quarter 2008 Results 2SPO Medical Reports First Quarter 2008 Results 3American Oriental Bioengineering Comments on Earthquake 2Huifeng Bio-Pharmaceutical (HFGB) Announces No Earthquake Related Damage to Facilities 2
(Date:8/31/2014)... "electronic-nose" for sniffing the highly infectious bacteria C. ... has been developed by a team at the University ... team has demonstrated that it is possible to identify ... would lead to rapid diagnosis of the condition., What ... possible to identify different strains of the disease simply ...
(Date:8/31/2014)... Over the past several decades, malaria diagnosis has changed very ... technician smears the blood across a glass slide, stains it ... the Plasmodium parasite, which causes the disease. This approach gives ... blood an important measure of disease severity but ... , A research team from the Singapore-MIT Alliance for Research ...
(Date:8/29/2014)... University of Texas Medical Branch at Galveston has gone on ... completely protect monkeys against a lethal dose of Ebola virus ... the disease is severe. , Thomas Geisbert, professor of microbiology ... discussing advances in Ebola treatment research. The filoviruses known as ... of pathogens, with fatality rates of up to 90 percent. ...
Breaking Biology News(10 mins):Scientists develop 'electronic nose' for rapid detection of C. diff infection 2A new way to diagnose malaria 2A new way to diagnose malaria 3Leading Ebola researcher at UTMB says there's an effective treatment for Ebola 2
... first experimental evidence that birds can be deceived by camouflage ... today in Nature [3 March 2005]. , The idea that ... rapidly adopted by many armies as long ago as the ... colouration' has long been used to explain how insects such ...
... that radio-tracking could be affecting the animals they ... in the British Ecological Society's Journal of Applied ... with a "dramatic shift" in the sex ratio ... assumption that radio-tracking does not fundamentally affect the ...
... Blackburn is responsible for collecting and storing thousands of ... -- to make sure there's enough genetic material to ... deals with important livestock such as Holstein cattle and ... who is the coordinator of the animal section at ...
Cached Biology News:Radio-tracking associated with 'dramatic shift' in water vole sex ratio 2Making Sure Sacred Sheep Don't Become Extinct 2
BD Primaria 35 mm Cell Culture Dish with Easy-Grip design, surface-modified polystyrene for enhanced cell culture. (20/sp, 200/ca) Packaging: 20 / sleeve, 500 / case ...
... is a software package that provides ... for custom buffer creation, set-up of ... crystallization trials. The software helps crystallographers ... automated protein crystallography: ...
The PROTEAN II slab gel casting stand is a component of the PROTEAN II XL and xi casting apparatus. It is supplied with gaskets....
Mouse monoclonal [H4B4] to LAMP2 - Lysosome Marker (Phycoerythrin) ( Abpromise for all tested applications). entrezGeneID: 3920 SwissProtID: P13473...
Biology Products: