chinese copper led Archives – The Green Optimistic green tech news, since 2008 Fri, 15 Jun 2012 17:49:37 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 2667534 Chinese LEDs Get 122% More Efficient by Copper Substrate Transplant https://www.greenoptimistic.com/led-copper-substrate-20120615/ https://www.greenoptimistic.com/led-copper-substrate-20120615/#respond Fri, 15 Jun 2012 17:49:26 +0000 https://www.greenoptimistic.com/?p=25050 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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