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LED lamps to the fishermen in a first phase. Virtually all kerosene lamps are to be replaced in the long term.
The LLFY network provides guidance in a highly fragmented LED market, supports potential users of LED technology and helps to find partners who have been certified according to stringent quality criteria to implement the LED lighting projects. The lamp made by Diana Electronic uses standard LED drivers from Infineon and amber-colored OSRAM LEDs of type Golden Dragon.
“On the one hand, this will not only help to protect the sensitive ecosystem of the mangrove forests from leaking kerosene and reduce CO 2 emissions, but will also provide the fishermen with innovative technology allowing them to continue their night fishing and thus safeguard their main source of income on the other,” said Michael Wohs, European Sales Manager at OSRAM Opto Semiconductors. Catches are not expected to suffer, as the light of the amber-coloured OSRAM LEDs of type Golden Dragon is very similar to that of the kerosene lamps.
The project marks another step towards introducing energy-efficient lighting in Sri Lanka and will make a major contribution to protecting the local environment. OSRAM and the Global Nature Fund already supplied fishermen on Lake Victoria in East Africa with energy-saving products back in 2008. OSRAM provides long-term support to countries in economically underdeveloped regions, helping them make more effective use of energy-efficient lighting.
Breakthrough Multiband Solar Cell Technology announced by RoseStreet Lab Scientists 2010-06-29
RoseStreet Labs Energy, announced today a breakthrough laboratory demonstration of the first known multiband photovoltaic device featuring three distinct light absorption regions
integrated into a single layer thin film device.
This breakthrough is based on RSLE’s IBand™ technology and is the first known intermediate band solar cell reduced to practice in a laboratory demonstration. This technology illustrates great promise for high efficiency thin film solar efficiencies above 35% by potentially capturing the full spectrum of the sun’s spectrum.
Efficient solar cells require optimized utilization of the whole solar spectrum. Currently this is achieved in a complex and expensive technology in which several solar cells with different band gaps are connected in series. A much simpler approach in which a single semiconductor has several different gaps sensitive to different parts of the solar spectrum has been proposed but never realized.
The intermediate band solar cell developed by RSLE, is a thin film technology based on the discovery of highly mismatched alloys. The simple and elegant three bandgaps, one junction device has the potential of significantly improved solar light absorption and higher power output than the III-V triple junction compound semiconductor devices that presently hold the world record for solar efficiency. RSLE’s demonstration device was fabricated on high volume CVD technology thereby validating the potential for high volume commercialization.
Bob Forcier, CEO, of RSLE, stated, “Although we are three to four years away from high volume production with the IBand product, this development opens up a new class of semiconductor devices for photovoltaic conversion and other advanced semiconductor applications. It fits seamlessly with our Hybrid PV commercialization.”
Wladek Walukiewicz, CTO, of RSLE, announced, “This demonstration is a major breakthrough in our photovoltaic semiconductor roadmap which will allow us to go to the next step in our PV research at an accelerated pace.
July 2010
www.compoundsemiconductor.net 47
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