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Organic LED lights consume less energy
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Eco-friendly LED lights soon to replace CFL
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Electrotherm to invest Rs 700 crore for solar plant in Gujrat
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Organic LED lights consume less energy
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Wallpaper that can glow with light and bendable flat-panel screens are a step closer thanks to research into organic LEDs (OLEDs), which are hailed as the next generation of environmentally friendly lighting technology.
OLEDs use little power to produce light, even compared with modern energy-saving bulbs.
The chemicals they are made from can be painted on to thin, flexible surfaces, potentially allowing traditional light bulbs in homes and offices to be replaced with panels of energy-efficient light built into walls, windows or even furniture. Other uses include flexible display screens, whose low power consumption would mean they could operate without mains power, for example as traffic warning signs powered by small solar panels.
Lomox Limited, a company based in north Wales, is awarded more than GBP450,000 by the U.K. government-backed Carbon Trust to accelerate the development of its OLED technology.
Around a sixth of the U.K.’s electricity is used for lighting and Lomox claims its OLEDs are 2.5 times more efficient than standard energy-saving lightbulbs. The Carbon Trust said that, if all modern lights were replaced by OLEDs, annual carbon emissions around the world could fall by almost 7.4million tonnes by 2050.
OLEDs are expensive to make and tend to have a relatively short life. “What our technology does ... is fix those problems,” said Ken Lacey, chief executive of Lomox.
He said his company’s OLEDs had the potential to last as long as modern fluorescent lights and, for the display sector, as long as LCD panels.
The company will focus its efforts on getting the first of its OLEDs to market by 2012, mainly for outdoor lighting.
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Eco-friendly LED lights soon to replace CFL
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| Compact fluorescent lamps (CFLs) will soon become a thing of past as the eco-friendly LED lights based on nanotechnology are all set to revolutionalize the lighting pattern in the country in coming years.
These solid state LEDs not only use nano phosphors (small sized glowing materials) but also have far better scattering and illuminating capacity as compared to CFLs that depend on mercury, a harmful metal that pollutes the environment and is difficult to recycle.
The LED lights stole the show on the penultimate day of three-day International Congress on Recent Advances in Environment Science and Technology, organised by Centre for Environmental Science and Technology, Banaras Hindu University on Tuesday. Prof Avinash C Pandey, head, department of Atmospheric and Ocean Science, University of Allahabad said that a proposal has been sent to the Defence Ministry for installing these lights along the sensitive borders to prevent infiltrations.
"It will be very difficult to put off these lights as once they are installed across the sensitive borders the infiltrators would have to fire at least 21 times to destroy them," he said while presenting a paper on climate change and sustainable development in the programme. In addition, these lights have other advantages like better colour refractions and longevity as compared to incandescent bulbs or CFLs, he added.
It may be mentioned here that Department of Science and Technology (DST), New Delhi is already funding a project on solid state lights based on nanotechnology in the department of Atmospheric and Ocean Science, University of Allahabad. Similarly, Japan is funding another project on use of nanotechnology in solar cells, started by the department.
"The nanomaterial based approach for eco-friendly and energy efficient energy is the need of hour for ensuring sustainable development," said Prof Pandey adding that a lot of research is being done for development of carbon nanotube wires, that have one thousand times current carrying capacity in comparison to copper wires. The day is not far when we would witness pollution free lighting system with the help of carbon nanotubes, he added.
What are LEDs?
These are multilayered semi-conductive materials forming lattice that allow nano phosphors to stick on the surface through a process called solid adsorption. These nano phosphors allow better scattering and illumination, giving LEDs edge over CFLs or incandescent tubes that depend on mercury. In addition, the LEDs are pollution free and provide viable lighting option.
CFLs Vs LEDs
* LEDs can save upto six times energy in a year as compared to CFLs
* LEDs have better colour refractions and luminous power than CFLs
* The loss of power transmission is less in LEDs than CFLs
* LEDs do not depend on mercury, a harmful metal that pollutes the environment and is difficult to recycle
* LEDs have more longevity than CFLs
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Electrotherm to invest Rs 700 crore for solar plant in Gujrat
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| "Solar Energy is a renewable source of energy. At one point of time, there can be shortage of power but not solar energy. It is thus required to make use of solar energy, bio-gas plants and store the traditional sources of energy." This piece of advice was given by chief development officer, Narendra Shanker Pandey, during a programme organised on the Rajeev Gandhi Akshay Urja Diwas Speaking on the occasion, the CDO said, "Shortage in the generation of electricity is being faced, while the demand of power is increasing continuously. In such circumstances, sunlight and other sources of energy should be used. Awareness should be created among masses for the same."
He also emphasised that non-renewable sources of energy like coal and petroleum are being used up quickly which may make them unavailable in the near future. "In the years to come, sunlight, bio-energy, wind-energy and hydro-energy would be available in abundance. People should use solar cookers, solar water heater, solar mobile chargers, solar street lights, solar torches, solar pumps, solar cooling caps as a substitute of energy.
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