efficient led Archives – The Green Optimistic

NanoLight – The Most Energy-Efficient LED Bulb in the World

Mike Sandru — Mon, 21 Jan 2013 07:59:11 +0000

These days, when energy efficiency is the watch-word in purchasing electronics, it is even more evident when bulbs are the objects of such purchases. With the LED’s longevity and energy efficiency in reducing energy bills, it is no wonder they are so popular. That has led to Gimmy Chu, Christian Yan and Tom Rodinger’s creation […]

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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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Highly-Efficient Laser Diode For Displays Expects Release in 2013

Mila Luleva — Thu, 27 Dec 2012 16:05:49 +0000

The latest development of the giant Sharp Corp is a red laser diode that has a conversion efficiency of 33% for the light sources of displays and operates in a single mode with a waveband of 640 nm. This striking increase in efficiency is achieved by a combination of materials and structure. The optical output […]

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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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Ultra-Efficient Quantum Dot LED (QLED) Screens Developed by LG and MIT Spinoff

Ovidiu Sandru — Mon, 13 Dec 2010 17:09:39 +0000

Just about the time when I thought buying a TV with an OLED screen is fancy and green, here's another news that intrigued me: Quantum-dot LED screens are actually greener and offer higher image quality than OLEDS, and they are to be produced by several manufacturers from the US, South Korea and Belgium.

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Fluorographene, The Thinnest Insulator Yet Discovered, Could Have Green Uses

Ovidiu Sandru — Fri, 05 Nov 2010 14:20:31 +0000

Kostya Novoselov and Andre Geim from the University of Manchester, the winners of this year's Nobel Prize for Physics, found that graphene, otherwise a good thermal and electrical conductor, has quite interesting insulating properties if combined with fluoride.

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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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Graphite Foam Reduces Temperature of LEDs, Making Them Cheaper and Longer-Lasting

Ovidiu Sandru — Sun, 29 Aug 2010 08:37:37 +0000

LED lights, yet not cutting edge idea for lighting, are in vogue nowadays, as they evolve by the year. Now, a group of researchers from Oak Ridge National Laboratory has discovered how to make LEDs last for longer and also lower their price.

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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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