led Archives – The Green Optimistic

Hugely-Efficient LEDs Now Use Quantum Dots

Arsenij Percov — Sat, 14 Jul 2018 20:27:31 +0000

Global warming and pollution are already impacting our lives. There are millions of deaths every year that are caused by them. For that reason, researchers from all over the world are looking for ways to make everything around us more energy efficient and use renewable resources. By implementing these strategies, we can reduce energy usage […]

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Solar Roadways to Pave Route 66 in Missouri With Solar Panels

Courtney Lepping — Sun, 03 Jul 2016 19:22:49 +0000

In a section of Route 66 located in Missouri, MoDOT, the Federal Highway Administration, and Solar Roadways plans to install solar panels to serve as public roads by the year’s end. The specially-designed roadways will feature LED lights to cover the expression of “lines and signage” as well as surface heating abilities. Not only will […]

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Solar Cells and LEDs Get an Extra Boost from Silicon

Mila Luleva — Fri, 21 Nov 2014 08:09:50 +0000

US scientists discovered the ability of a special form of silicon to both conduct electricity, and absorb and emit light. The unique property of the element makes it extremely suitable for use in new generation solar cells and LED lights. This form of silicon is not the one that we find in great abundance in […]

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Laser-Based Lighting the New Alternative to LEDs

Leigh Hutchens — Fri, 04 Oct 2013 03:21:04 +0000

Research from the University of California, Santa Barbara has led to an alternative LED lighting that is just as bright, high-powered, and energy efficient, but powered by a laser diode and inorganic phosphors. The research was published in the journal AIP Advances. LEDs have advantages over incandescent lights, including a smaller size and greater durability […]

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Scientists Found Means to Boost LED Efficiency

Mila Luleva — Thu, 01 Aug 2013 14:47:01 +0000

Researchers from the Rensselaer Polytechnic Institute established the reason behind the loss of efficiency of light-emitting diodes (LEDs). The so-called “efficiency droop” causes as much as 20% greater electrical currents, preventing major improvements in LED lights for household needs. The study, published in the journal Applied Physical Letters, describes a phenomenon referred to as “electron leakage” […]

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LEDs Improve People’s Health and Wellbeing, Besides Being Energy-Efficient

Mila Luleva — Wed, 27 Mar 2013 19:54:35 +0000

New research in the field of light-emitting diodes (LEDs) is being conducted at the TU Darmstadt’s Institute for Lighting Technologies, with a main focus on human perception, health and wellbeing. The main advantage of LEDs, and the reason why they are being increasingly used as streetlights, automobile taillights, and indoor building lighting systems, is the […]

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Micro LEDs Illuminate Offices and Deliver Internet Through Li-Fi

Leigh Hutchens — Wed, 30 Jan 2013 07:39:27 +0000

If a consortium of universities in the United Kingdom meet their goal, a technology to deliver internet communications will be created that could simultaneously be used to provide lighting and used as information displays. Li-Fi technology, or transmissions of internet communications that use visible light instead of radio or microwaves like current Wi-Fi, was the […]

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Highly Efficient Light-Emitting Diode Mimics Fireflies

Mila Luleva — Thu, 10 Jan 2013 08:57:08 +0000

Studying the structure of firefly lanterns, scientists from Belgium, France and Canada were able to identify a pattern of jagged scales that enhances the glow of the organs. They used this to create an LED overlayer, which increases the LED light extraction by up to 55%. The study published in the latest issue of the […]

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Organic Light-Emitting Diodes Replace Indium-Oxide in Screen Displays

Mila Luleva — Wed, 05 Dec 2012 09:59:22 +0000

A breakthrough development emerged from the U.S Department of Energy’s (DOE) Ames Laboratory. Scientists have discovered a way to replace breakable metal-oxide, indium tin oxide, used in screen displays in computers, TVs and cell phones, with a polymer in organic light emitting diodes (OLEDs). The findings were recently published in the journal Advanced Materials, with […]

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New Yellow Phosphor LED Bulb is More Efficient and Economical

Benji Jerew — Fri, 19 Oct 2012 22:00:14 +0000

Typical white light-emitting diodes [LED] are extremely bright and expensive to manufacture. Their applications are also limited because of the directional nature of the light they produce. Japanese researchers have developed a new white LED, using a different phosphor compound, that eliminates these issues. The new yellow phosphor, “CL_MS phosphor,” was co-developed by Koito Manufacturing […]

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Chinese LEDs Get 122% More Efficient by Copper Substrate Transplant

Ovidiu Sandru — Fri, 15 Jun 2012 17:49:26 +0000

Gallium nitride (GaN) light emitting diodes, or commonly known as LEDs are usually grown on a layer of silicon – that abundant material that makes up 90+% of Earth’s crust. A team of Chinese researchers have improved their efficiency by transferring them onto a layer of copper. The GaN crystals on the copper substrate were […]

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NGK Discovers 90% Efficient Gallium Nitride LED Source

Ovidiu Sandru — Mon, 07 May 2012 15:07:39 +0000

A new gallium nitride (GaN) semiconductor developed by NGK Insulators will hugely increase the luminous efficiency of LEDs from 30-40% to about 90%, reports TechOn. The transparent wafer created by NGK has a very low defect density and has been made by using a proprietary liquid phase growth method for a single-crystal growth process. (if […]

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The LED Market to See Considerable Increase by 2021

Mike Sandru — Wed, 30 Nov 2011 19:24:34 +0000

The latest report from Pike Research shows that LED lighting will capture 52% of the Commercial Building Market by 2021. The price for these light-emitting diodes has already begun to decline. The researchers believe that the lighting industry will change significantly during the next five years than it has in the previous 50. Currently, the […]

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LEDs Using Surface Plasmons Several Times Stronger, Japanese Researchers Report

Ovidiu Sandru — Thu, 23 Sep 2010 12:34:57 +0000

We all know LED as being the flagship of green lighting, but what if those so-called "efficient" LEDs turned out to be even more energy-effective under certain conditions? The Kyoto University, in collaboration with Stanley Electric Co Ltd found a way to increase the emission intensity of silicon-based thin films by several times.

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NREL Researchers Using Solar Cell Technology for More Efficient White LEDs

Ovidiu Sandru — Tue, 13 Apr 2010 19:35:51 +0000

Researchers from the National Renewable Energy Laboratory (NREL) have demonstrated they can produce white light by first making a yellow-green LED, and then combining it with other colored LEDs.

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Energy Efficient Organic LEDs Made from Salmon DNA

Mike Sandru — Sun, 26 Jul 2009 06:19:56 +0000

Researchers at the University of Connecticut have used salmon DNA to develop next-gen LED bulbs.

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ESL Light Bulbs: Greener Than CFL, Cheaper Than LEDs

Ovidiu Sandru — Sun, 03 Aug 2008 20:36:07 +0000

Residential Lighting has invented a new type of light bulb, that claims green gains, even more green than the CFLs. The new technology is called ESL (electro-stimulated luminescence). The technology was patented in June by a startup company called Vu1.

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