OLED - Organic Light Emitting Diode Today's most rapidly growing technology in World All display technology now change to OLED Less Power consumption Cost Effective Flexible Environment Friendly

1. OLED
Semester IV
Electronics &Communication Engineering
Prepared By- Dishank (13BEC021)
Kevin (13BEC074)
Guided By- Prof. Usha Mehta
ORGANIC LIGHT EMMITING DIODE

2. Content
What is an OLED?
How is it made?
How do OLEDs emit light?
 Types of OLEDs
Advantages and Disadvantage
Future Of OLEDs
Conclusion

3. INTRODUCTION

4. These all devices may be possible in the
near future with the help of a technology
called Organic Light-Emitting Diodes.

5. What is an OLED?
 An OLED is any light emitting diode
in which organic layers are
responsible for light emission.

6. The Basic Principal
Electroluminescence is a process in
which a material emits light in
response to electrical field
applied across it.

7. Cathode - The cathode injects electrons
into emissive layer.
Emissive layer - This layer is made of
polyfluorene that transport electrons
from the cathode. This is where light is
made.
Conducting layer - This layer is made of
polyaniline that transport "holes" from
the anode.
Anode – It is kept transparent.
Usually made up of Indium tin oxide (ITO)
that removes electrons.
Substrate - The substrate supports the
OLED.

9. How it works?

10. Types of OLEDs
Passive-matrix OLED
Active-matrix OLED
Transparent OLED
Top-emitting OLED
Foldable OLED
White OLED

11. Passive Matrix
The organic layers are
between strips of cathode
and anode.
The intersections form the
pixels.
Easy to make
Uses more power

12. Active-matrix OLED
Full layers of cathode and
anode.
Anode overlays a thin film
transistor (TFT).
Requires less power
Higher refresh rates

13. Transparent OLEDs
 Transparent OLEDs have only
transparent components
(substrate, cathode and anode)
 When turned off, are up to 85
percent as transparent as their
substrate.

14. Top emitting OLEDs
 Top-emitting OLEDs have a
substrate that is reflective.
Foldable OLED
 Foldable OLEDs have substrates made of very
flexible metallic foils or plastics.

15. White OLED
 White OLEDs emit white light
that is brighter, more uniform
and more energy efficient.

16. Why it’s so great?
 Less power consumption
 Lower cost in the future
 Flexible Display
 Thin display
 Safer for environment

17. Better contrast ratio

18. Wider Viewing Angle

19. Major Drawbacks
Lifespan
Easily damageable
Outdoor performance
Complex fabrication methods

20. OLED VS OTHERS

22. Future Aspects
 Finding a cheap way to produce
 “Roll-To-Roll” Manufacturing
 Increasing efficiency of blue OLED
 Increasing Lifespan of OLED

23. Corporation in OLED’s

24. Conclusion

25. REFERENCES
1. http://electronics.howstuffworks.com/oled.html
2. http://www.tridonic.com/ae/img/OLEDmodule_LUREON_REP.jpg
3. http://cdn1.bigcommerce.com/server4300/905b4/product_images/uploaded_ima
ges/how-do-leds-work.jpg
4. http://s.hswstatic.com/gif/oled-top-emitting.gif
5. http://www.homeinfo.hu/images/stories/kivitelezes/villamossag/OLED_5.jpg
6. http://www.maximumpc.com/files/u90693/anatomy-full.jpg

26. Thank You