Connect with us

Hi, what are you looking for?

CleanTechnica

Energy Efficiency

Brighter LEDs Inspired By Fireflies, Efficiency Increased By 55%

 
A breakthrough in the efficiency of LEDs has been made thanks to new research that investigated how fireflies create their light. By utilizing a newly discovered pattern of jagged scales on the fireflies’ abdomens, LEDs 55% more efficient than previous designs have been created.

20130108-235212.jpg

Researchers used the newly discovered pattern to make an LED overlayer that mimicked the structure on the fireflies. This overlayer increased LED light extraction very considerably. And it “could be easily tailored to existing diode designs to help humans light up the night while using less energy,” the Optical Society of America notes.

“Fireflies create light through a chemical reaction that takes place in specialized cells called photocytes. The light is emitted through a part of the insect’s exoskeleton called the cuticle. Light travels through the cuticle more slowly than it travels through air, and the mismatch means a proportion of the light is reflected back into the lantern, dimming the glow. The unique surface geometry of some fireflies’ cuticles, however, can help minimize internal reflections, meaning more light escapes to reach the eyes of potential firefly suitors.”

The light-emitting diodes, or LEDs, used by humans have the same problems with internal reflection. So by copying the patterns used by the fireflies, much greater efficiencies than have been previously achieved are possible. Specifically, the researchers created a jagged overlayer that was placed on top of a “standard gallium nitride LED.”


 
They “deposited a layer of light-sensitive material on top of the LEDs and then exposed sections with a laser to create the triangular factory-roof profile. Since the LEDs were made from a material that slowed light even more than the fireflies’ cuticle, the scientists adjusted the dimensions of the protrusions to a height and width of 5 micrometers to maximize the light extraction.”

20130108-235220.jpg

Researchers have previously copied other features of firefly lanterns, but almost entirely on the nanoscale, as changes at a larger scale were assumed to be less effective for increasing efficiency. This assumption was made because these previously unresearched features are larger than the wavelengths of visible light are. This new research is the first that has identified these micrometer-scale photonic features, and to the surprise of the researchers, these features increased light extraction considerably more than the smaller nanoscale features.

The researchers currently think that commercial technology based on their findings should be available within the next couple of years.

The new research was just published in a pair of papers in the Optical Society’s (OSA) open-access journal Optics Express.

This research is another in a number of recent breakthroughs in LED technology, and also potential uses and applications, including: space farming, spray-on LED wallpaper, and combating seasonal affective disorder.

Source: Optical Society of America
Image Credits: Nicolas Andr


Appreciate CleanTechnica’s originality? Consider becoming a CleanTechnica Member, Supporter, Technician, or Ambassador — or a patron on Patreon.
 
 
Have a tip for CleanTechnica, want to advertise, or want to suggest a guest for our CleanTech Talk podcast? Contact us here.
Written By

James Ayre's background is predominantly in geopolitics and history, but he has an obsessive interest in pretty much everything. After an early life spent in the Imperial Free City of Dortmund, James followed the river Ruhr to Cofbuokheim, where he attended the University of Astnide. And where he also briefly considered entering the coal mining business. He currently writes for a living, on a broad variety of subjects, ranging from science, to politics, to military history, to renewable energy.

Comments

#1 most loved electric vehicle, solar energy, and battery news & analysis site in the world.

 

Support our work today!

Advertisement

Power CleanTechnica: $3/Month

Tesla News Solar News EV News Data Reports

Advertisement

EV Sales Charts, Graphs, & Stats

Advertisement

Our Electric Car Driver Report

30 Electric Car Benefits

Tesla Model 3 Video

Renewable Energy 101 In Depth

solar power facts

Tesla News

EV Reviews

Home Efficiency

You May Also Like

Autonomous Vehicles

These are times when you wish you could gather children over a bonfire to tell the story of how slime saved the day!

Air Quality

Episode #49 of Cleantech Talk is here! In this episode, we talk about reinventing the wheel, a Faraday Future maybe-resurrection, and Japan’s logical hots...

Buildings

Instead of halfway measures and greenwashing, Ray Anderson oriented Interface to the singular goal of having no net negative impact on the environment, something...

Buildings

Cradle to Cradle made industrial ecology and the circular economy a lot more mainstream than they had previously been. They’re both still niche notions, but...

Copyright © 2021 CleanTechnica. The content produced by this site is for entertainment purposes only. Opinions and comments published on this site may not be sanctioned by and do not necessarily represent the views of CleanTechnica, its owners, sponsors, affiliates, or subsidiaries.