Solid State Lighting Semiconductor Spectroscopy & Devices
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Solid State Lighting Solid State Lighting Semiconductor Spectroscopy & Devices Semiconductor Spectroscopy & Devices This poster was prepared by Jochen Bruckbauer. My research at Strathclyde is funded by the Strathclyde University Further information: [email protected] Overview Conventional light sources, like the light bulb and fluorescent lamps, are very inefficient in transforming energy into light. Due to upcoming problems in energy supplies new and more efficient light sources have to be developed. In recent years enormous advances in solid state lighting were made in the development and raising the efficiencies of white light sources made of semiconductors. What is solid state lighting? Figure 1: LEDs of different colours. Applications for LEDs: Figure 2: Traffic lights, car headlights, room lighting… Why solid state lighting? Around 20 % of Earth's total power consumption is used for lighting! Figure 3: Earth at night from space. Evolution of lighting Figure 4: In light bulbs a current is passed through a wire, which is very inefficient due to heating. In fluorescent lamps electricity is passed trough a tube containing gas, which is more efficient than a light bulb, but they contain traces of toxic materials. LEDs utilise the movement of electrons inside a semiconductor for light emission. Over 150 years ago… How to achieve white LEDs? Figure 5: Optical image of a blue LED with phosphor. My research at Strathclyde: Yellow phosphor converts the blue light of a InGaN/GaN LED (typical material) into a broad visible spectrum, which adds up to white light. Why solid state lighting, again? 1) Very efficient transformation of energy into light 2) Very long lifetimes (20 000 – 50 000 hours) LED is the light source of the present generation! Solid state lighting is the term for devices of light sources made of a material called semiconductors, i.e. light emitting diodes (LED). www.otherthings.com garbagebin.wordpress. com www.wikipedia.org diytrade.com www.guardian.co.uk www.wikipedia.org www.campsolution.com www.wikipedia.org www.nasa.gov 60-80 years …till present later… energyboomer.typepad.com
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Solid State Lighting Semiconductor Spectroscopy & Devices. Further information: [email protected]. Overview. - PowerPoint PPT Presentation
Transcript of Solid State Lighting Semiconductor Spectroscopy & Devices
Solid State LightingSolid State LightingSemiconductor Spectroscopy & DevicesSemiconductor Spectroscopy & Devices
This poster was prepared by Jochen Bruckbauer. My research at Strathclyde is funded by the Strathclyde University research fund.
Further information: [email protected]
OverviewConventional light sources, like the light bulb and fluorescent lamps, are very inefficient in transforming energy into light. Due to upcoming problems in
energy supplies new and more efficient light sources have to be developed. In recent years enormous advances in solid state lighting were made in the development and raising the efficiencies of white light sources made of semiconductors.
What is solid state lighting?
Figure 1: LEDs of different colours.
Applications for LEDs:
Figure 2: Traffic lights, car headlights, room lighting…
Why solid state lighting?
Around 20 % of Earth's total power consumption is used for lighting!
Figure 3: Earth at night from space.
Evolution of lighting
Figure 4: In light bulbs a current is passed through a wire, which is very inefficient due to heating. In fluorescent lamps electricity is passed trough a tube containing gas, which is more efficient than a light bulb, but they contain traces of toxic materials. LEDs utilise the movement of electrons inside a semiconductor for light emission.
Over 150 years ago…
How to achieve white LEDs?
Figure 5: Optical image of a blue LED with phosphor.
My research at Strathclyde:
Yellow phosphor converts the blue light of a InGaN/GaN LED (typical material) into a broad visible spectrum, which adds up to white light.
Why solid state lighting, again?
1) Very efficient transformation of energy into light
2) Very long lifetimes (20 000 – 50 000 hours)
LED is the light source of the present generation!
Solid state lighting is the term for devices of light sources made of a material called semiconductors, i.e. light emitting diodes (LED).
www.otherthings.com
garbagebin.wordpress.comwww.wikipedia.org diytrade.com
www.guardian.co.uk www.wikipedia.org
www.campsolution.com
www.wikipedia.org
www.nasa.gov
60-80 years …till present
later…
energyboomer.typepad.com
