04-04-2012, 11:59 AM
Organic Light Emitting Diodes (OLED)
OLED MEHDI.ppt (Size: 1.67 MB / Downloads: 38)
OLED
An OLED is an LED in which the emissive electroluminescent layer is a film of organic compounds which emit light in response to an electric current
OLED structure
Substrate
Anode
Organic Layers
-Emissive Layer
-Conductive Layer
Substrate
he basic OLED
The holes move more efficiently in organics
Excitons begin to form in emissive layer
Why OLEDs
Lighting efficiency
Incandescent bulbs are inefficient
Fluorescent bulbs give off ugly light
LEDs (ordinary light emitting diodes) are bright points; not versatile
OLEDs may be better on all counts
Displays: Significant advantages over liquid crystals
Faster
Brighter
Lower power
Cost and design
LEDs are crystals; LCDs are highly structured; OLEDs are not –
Malleable; can be bent, rolled up, etc.
Easier to fabricate
OLED MEHDI.ppt (Size: 1.67 MB / Downloads: 38)
OLED
An OLED is an LED in which the emissive electroluminescent layer is a film of organic compounds which emit light in response to an electric current
OLED structure
Substrate
Anode
Organic Layers
-Emissive Layer
-Conductive Layer
Substrate
he basic OLED
The holes move more efficiently in organics
Excitons begin to form in emissive layer
Why OLEDs
Lighting efficiency
Incandescent bulbs are inefficient
Fluorescent bulbs give off ugly light
LEDs (ordinary light emitting diodes) are bright points; not versatile
OLEDs may be better on all counts
Displays: Significant advantages over liquid crystals
Faster
Brighter
Lower power
Cost and design
LEDs are crystals; LCDs are highly structured; OLEDs are not –
Malleable; can be bent, rolled up, etc.
Easier to fabricate