1. A PRESENTATION
ON
ORGANIC LIGHT EMITTING DIODE(OLED)
Submitted By-
Samujjal Thakuria (200812926032)
DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION
JORHAT INSTITUTE OF SCIENCE AND TECHNOLOGY
2. contents
•What is OLED
•Why OLED
•History of OLED
•Components of OLED
•Working Principle of OLED
•Types of OLED
•Advantages and Disadvantages
•Application
•Future Scope
•Conclusion
3. OLED
★ Why OLED
○ low power consumption
○ no backlight required (self emitting)
○ brighter
○ thinner
○ high contrast
○ flexible
○ high view angle
○ higher refresh rate
★ History of OLED
○ first developed by Eastman Kodak in 1987
○ first commercial PMOLED by Pioneer in 1996
○ many companies developed OLED display in 2000
○ Sony developed world’s largest fullcolor OLED in
2001
○ Over 10 million PMOLED sub-displays were sold in
2003
★ What is OLED
○ Organic Light Emitting diode
○ comprised of very thin films of organic layers
○ create light when corrent passes
organic light emitting diode
4. Components
organic light emitting diode
1. Substrate
2. Anode
3. Organic layers
a. Conducting layer: transport holes from
anode.
b. Emissive layer: transport electrons from
cathode.
4. Cathode
5. Working principle
organic light emitting diode
Electrical current:
● remove electrons from the conductive layer
● gives electrons to the emissive layer
● conductive layer leaves holes that filled with
the electrons of emissive layer
● the holes jumps to the emissive layer and
recombine with the electrons.
As the electrons drop into the holes, they release
their extra energy as light.
7. Advantages
❖ layers are lighter, thinner and flexible
❖ substrate can be plastic
❖ brighter image due to thinner organic layers
❖ no light blocking system
❖ no backlight required
❖ large view angle
❖ capable to produce perfect black image
❖ blue OLED flims have short lifetime
❖ Manufacturing is expensive
❖ Interaction with water causes instant
damage.
❖ more power consume to produce white
image.
❖ white image leads to reduce battery life.
Disadvantages
organic light emitting diode
8. Application
● Mainly used as display of
○ TV screen
○ PC monitors
○ Phone screen
○ Camera screen
○ Car deshboard
organic light emitting diode
9. Future Scope
organic light emitting diode
● OLED technology may usher in a new era of large-area, transparent, flexible and low-energy display and lighting
products.
● The flexibility of OLEDs enables manufacturers to produce OLEDs using roll-to-roll manufacturing processes,
and allows for the production of flexible display and lighting products.
● Developing sufficiently durable and flexible OLEDs will require better materials and further development of
manufacturing tools and processes.
● Research and development in the field of OLEDs is proceeding rapidly.
And this may lead to the future application in heads- up displays, automotive dashboards, billboard type
displays, home and office lightings and flexible displays.
10. Conclusion
organic light emitting diode
● OLEDs could open a new era in organic optoelectronics and serve as test beds to address general fundamental
optoelectronic and photonic issues.
● The focus of OLED development is the possibility to enable new display/light source technologies, and exploit a
transport geometry to suppress the deleterious photon losses and exciton quenching mechanisms inherent in
the OLED architecture.
