University of Cambridge > Talks.cam > Cambridge Society for the Application of Research (CSAR) > Gallium Nitride LEDs: How can they save energy, purify water, improve our health (and be made here in the UK)

Gallium Nitride LEDs: How can they save energy, purify water, improve our health (and be made here in the UK)

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If you have a question about this talk, please contact Dr Nigel Bennee.

This talk will be preceeded by a short presentation by Olivia Macleod on her research

Gallium nitride (GaN) is poised to save more energy and CO2 emissions than solar, wind power and biomass together. InGaN/GaN quantum well LEDs for lighting have the potential to save 10-15% of total electricity usage. The main problem with obtaining widespread use in our homes and offices is cost. This talk will describe how growing GaN LEDs on large area Si substrates can substantially reduce the cost, and the problems involved. GaN not only has low power consumption for lighting, it also has for electronics. Replacing Si power electronics by GaN would save another 10% of electricity. So GaN-based devices could save 20-25% of all the electricity we use and 20-25% of CO2 emissions. AlGaN/GaN quantum well deep-UV LEDs have the potential to purify water in the developing world (and the developed world) saving millions of lives.

Finally, dynamic colour LED lighting can be optimised for our health, improving our productivity at work, in school classrooms, etc.

Our research on low-cost GaN LEDs is being exploited by Plessey who are now manufacturing millions of these LEDs in the UK.

This talk is part of the Cambridge Society for the Application of Research (CSAR) series.

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