Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Layer of nanoparticles could improve LED performance and lifetime

Abstract:
Adding a layer of nanoparticles to LED designs could help them produce more light for the same energy, and also increase their lifetime.

Layer of nanoparticles could improve LED performance and lifetime

London, UK | Posted on August 7th, 2020

This is according to a team from Imperial College London and the Indian Institute of Technology (IIT) Guwahati who have found a new way to boost the amount of light LEDs produce. They report their innovation in the journal Light Science & Applications.

Making light-emitting diode (LED) light sources more efficient and longer-lasting will mean they use less energy, reducing the environmental impact of their electricity use. LEDs are used in a wide range of applications, from traffic lights and backlighting for electronic displays, smartphones, large outdoor screens, and general decorative lighting, to sensing, water purification, and decontamination of infected surfaces.

The team modelled the impact of placing a two-dimensional (single layer) of nanoparticles between the LED chip, which produces the light, and the transparent casing that protects the chip. Although the casing is necessary, it can cause unwanted reflections of the light emitted from the LED chip, meaning not all the light escapes.

They found that adding a layer of finely tuned nanoparticles could reduce these reflections, allowing up to 20 percent more light to be emitted. The reflections also increase the heat inside the device, degrading the LED chip faster, so reducing the reflections could also reduce the heat and increase the lifetime of LED chips.

Co-author Dr Debabrata Sikdar from IIT Guwahati, formerly a European Commission Marie Curie-Sklodowska Fellow at Imperial, commented: "While improvements to the casing have been suggested previously, most make the LED bulkier or more difficult to manufacture, diminishing the economic effect of the improvement.

"We think that our innovation, based on fundamental theory and the detailed, balanced optimization analysis we performed, could be introduced into existing manufacturing processes with little disruption or added bulk."

Co-author Professor Sir John Pendry, from the Department of Physics at Imperial, said: "The simplicity of the proposed scheme and the clear physics underpinning it should make it robust and, hopefully, easily adaptable to the existing LED manufacturing process.

"It is obvious that with larger light extraction efficiency, LEDs will provide greater energy savings as well as longer lifetime of the devices. This will definitely have a global impact on the versatile LED-based applications and their multi-billion-dollar market worldwide."

Co-author Professor Alexei Kornyshev, from the Department of Chemistry at Imperial, commented: "The predicted effect is a result of development of a systematic theory of various photonic effects related to nanoparticle arrays at interfaces, applied and experimentally tested in the context of earlier reported switchable mirror-windows, tuneable-colour mirrors, and optical filters."

The next stage for the research will be manufacturing a prototype LED device with a nanoparticle layer, testing the best configurations predicted by the theory - including the size, shape, material and spacing of the nanoparticles, and how far the layer should be from the LED chip.

The authors believe that the principles used can work along with other existing schemes implemented for enhancing light extraction efficiency of LEDs. The same scheme could also apply to other optical devices where the transmission of light across interfaces is crucial, such as in solar cells.

####

For more information, please click here

Contacts:
Hayley Dunning

020-759-42412

@imperialspark

Copyright © Imperial College London

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 News Press

News and information

HKUST researchers develop a novel integration scheme for efficient coupling between III-V and silicon November 18th, 2022

Researchers at Purdue unlock light-matter interactions on sub-nanometer scales, leading to ‘picophotonics’ November 18th, 2022

Rice turns asphaltene into graphene for composites: ‘Flashed’ byproduct of crude oil could bolster materials, polymer inks November 18th, 2022

How “2D” materials expand: New technique that accurately measures how atom-thin materials expand when heated could help engineers develop faster, more powerful electronic devices November 18th, 2022

Display technology/LEDs/SS Lighting/OLEDs

Physicists from the University of Warsaw and the Military University of Technology have developed a new photonic system with electrically tuned topological features October 14th, 2022

Liquid crystal templated chiral nanomaterials October 14th, 2022

Research improves upon conventional LED displays: With new technology, LEDs can be more cost-efficient and last longer September 9th, 2022

Scientists take control of magnetism at the microscopic level: Neutrons reveal remarkable atomic behavior in thermoelectric materials for more efficient conversion of heat into electricity August 26th, 2022

Possible Futures

HKUST researchers develop a novel integration scheme for efficient coupling between III-V and silicon November 18th, 2022

NIST’s grid of quantum islands could reveal secrets for powerful technologies November 18th, 2022

A new experiment pushes the boundaries of our understanding of topological quantum matter: The behavior of bosonic particles observed in a magnetic insulator fabricated from ruthenium chloride can be explained by a relatively new and little-studied physics phenomenon called the B November 18th, 2022

Trial by wind: Testing the heat resistance of carbon fiber-reinforced ultra-high-temperature ceramic matrix composites: Researchers use an arc-wind tunnel to test the heat resistance of carbon fiber reinforced ultra-high-temperature ceramic matrix composites November 18th, 2022

Discoveries

An on-chip time-lens generates ultrafast pulses: New device opens the doors to applications in communication, quantum computing, astronomy November 18th, 2022

Researchers at Purdue unlock light-matter interactions on sub-nanometer scales, leading to ‘picophotonics’ November 18th, 2022

Rice turns asphaltene into graphene for composites: ‘Flashed’ byproduct of crude oil could bolster materials, polymer inks November 18th, 2022

How “2D” materials expand: New technique that accurately measures how atom-thin materials expand when heated could help engineers develop faster, more powerful electronic devices November 18th, 2022

Announcements

HKUST researchers develop a novel integration scheme for efficient coupling between III-V and silicon November 18th, 2022

NIST’s grid of quantum islands could reveal secrets for powerful technologies November 18th, 2022

A new experiment pushes the boundaries of our understanding of topological quantum matter: The behavior of bosonic particles observed in a magnetic insulator fabricated from ruthenium chloride can be explained by a relatively new and little-studied physics phenomenon called the B November 18th, 2022

How “2D” materials expand: New technique that accurately measures how atom-thin materials expand when heated could help engineers develop faster, more powerful electronic devices November 18th, 2022

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

An on-chip time-lens generates ultrafast pulses: New device opens the doors to applications in communication, quantum computing, astronomy November 18th, 2022

Researchers at Purdue unlock light-matter interactions on sub-nanometer scales, leading to ‘picophotonics’ November 18th, 2022

Rice turns asphaltene into graphene for composites: ‘Flashed’ byproduct of crude oil could bolster materials, polymer inks November 18th, 2022

How “2D” materials expand: New technique that accurately measures how atom-thin materials expand when heated could help engineers develop faster, more powerful electronic devices November 18th, 2022

Water

Taking salt out of the water equation October 7th, 2022

Scientists capture a ‘quantum tug’ between neighboring water molecules: Ultrafast electrons shed light on the web of hydrogen bonds that gives water its strange properties, vital for many chemical and biological processes July 8th, 2022

Scientists offer solutions for risky tap water June 17th, 2022

UBCO researchers change the game when it comes to activity tracking: Flexible, highly sensitive motion device created by extrusion printing June 17th, 2022

Photonics/Optics/Lasers

HKUST researchers develop a novel integration scheme for efficient coupling between III-V and silicon November 18th, 2022

An on-chip time-lens generates ultrafast pulses: New device opens the doors to applications in communication, quantum computing, astronomy November 18th, 2022

Researchers at Purdue unlock light-matter interactions on sub-nanometer scales, leading to ‘picophotonics’ November 18th, 2022

Semi-nonlinear etchless lithium niobate waveguide with bound states in the continuum November 4th, 2022

Solar/Photovoltaic

Predicting the device performance of the perovskite solar cells from the experimental parameters through machine learning of existing experimental results November 18th, 2022

New insights into energy loss open doors for one up-and-coming solar tech November 18th, 2022

Scientists have proposed a new material for perovskite solar cells: It is cheaper its analogues, easier to manufacture and to modify October 28th, 2022

Current and Future Developments in Nanomaterials and Carbon Nanotubes: Applications of Nanomaterials in Energy Storage and Electronics October 28th, 2022

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