tag: LEDs

Low Power Everywhere
By Kiran Vittal - 14 Jun, 2012 - Comments: 0

By Kiran Vittal School is over for my kids and the summer holidays are here. We are planning to make minor modifications to our home, which includes installation of recessed lights. LED light bulbs are all over the place in home appliance stores and they claim 85% savings in energy costs with a life span of 50,000 hours. The cost of these LED bulbs is five to six times the cost of your average... » read more

High performance LEDs on Si wafers – the race is on
By Michael Watts - 26 Jan, 2012 - Comments: 0

Light Emitting Diodes (LED’s) are about to pick up one of the key drivers from the low cost IC industry – Gallium Nitride (GaN) LED’s are being manufactured on large silicon wafers. This opens the future prospect of manufacturing 300 mm wafers filled with LED’s at a huge cost advantage. The larger area means that there are many more devices per process operation, which has driven the se... » read more

Different wavelengths from one material – a new freedom in LED design
By Michael Watts - 03 Jan, 2012 - Comments: 0

By Michael P.C. Watts When light is emitted from a particle that contains a few hundred atoms, the wavelength of the light is affected by the size of the region – this is a very interesting quantum effect that provides a way of tuning wavelengths of Light Emitting Diodes (LED) independent of the band-gap of the material. In particular, there is a possibility of creating a white LED or a gr... » read more

Patterned LED Substrates
By Michael Watts - 03 May, 2011 - Comments: 0

by Mike Watts Patterning in LEDs continues to get plenty of research attention, with no less than 11 papers at Photonics West 2011. This is an interesting example of the challenges of technology and business forecasting. For several years it looked like improving light extraction using a surface photonic crystal would be implemented, but to date the improvement in light extraction has not of... » read more

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