North Carolina State University researchers developed new processing technique makes LED brighter

New processing technique for brighter, resilient LED

5:36 AM, 24th March 2014
North Carolina State University research
By coating polar gallium nitride with phosphonic groups, the researchers increased luminescence without increasing energy input.

NORTH CAROLINA, US: Research team at North Carolina State University have developed a new processing technique that makes light emitting diodes (LEDs) brighter and more resilient by coating the semiconductor material gallium nitride (GaN) with a layer of phosphorus-derived acid.

“By coating polar GaN with a self-assembling layer of phosphonic groups, we were able to increase luminescence without increasing energy input. The phosphonic groups also improve stability, making the GaN less likely to degrade in solution. Making the GaN more stable is important because that makes it more viable for use in biomedical applications, such as implantable sensors,” said Stewart Wilkins, PhD student, North Carolina State University.

The researchers started with polar GaN, composed of alternating layers of gallium and nitrogen. To increase luminescence, they etched the surface of the material with phosphoric acid. At the same time, they added phosphonic groups – organic molecules containing phosphorus – that self-assembled into a monolayer on the surface of the material. This layer further increased luminescence and improved the stability of the GaN by making it less likely to react chemically with its environment.

© North Carolina State University News

0 Comments

Login

Your Comments (Up to 2000 characters)
Please respect our community and the integrity of its participants. WOC reserves the right to moderate and approve your comment.

Related News


Onex to sell Warranty Group to TPG for $1.5 billion

TORONTO, CANADA: Onex Corporation and its affiliates have agreed to sell The Warranty Group to an affiliate of TPG Capital for an enterprise value of ...

Read more
Saturated fat not linked to heart disease, say scientists

CAMBRIDGE, UK: Many of us have long been told that saturated fat, the type found in meat, butter and cheese, causes heart disease. But a large and exh ...

Read more
Cabot to sell Security Materials business to SICPA for $20 million

BOSTON, US: Cabot Corporation has entered into an agreement to sell its Security Materials business to SICPA for approximately $20 million in cash con ...

Read more
Eastman to expand 2-ethylhexanol capacity at Longview, US

KINGSPORT, US: Eastman Chemical Company plans to expand 2-ethylhexanol (2-EH) capacity at its Longview, Texas site, US. The e ...

Read more
World water day 2014, focus on water and energy

NEW YORK, US: World water day is observed every year on 22 March. With the increasing water scarcity worldwide, there is need for such a day to create ...

Read more
NASA finds ‘zebra stripe’ around Earth

PASADENA, US: Scientists have uncovered a mysterious structure that surround the Earth rather like a giant zebraprint jacket. The strange structure ha ...

Read more