This document discusses OLED (Organic Light Emitting Diode) technology. It begins with an introduction to OLEDs, noting that they are an emerging display technology that offers lighter, brighter, thinner displays compared to traditional LED and LCD screens. The document then covers the history and development of OLED technology, the basic structure and working principle of an OLED, which involves a current flowing through organic layers that causes electrons and holes to recombine and emit light. Application examples are given as well as advantages such as thinness, flexibility and high contrast ratio, though lifespan and cost are listed as disadvantages.

1. OLED
Organic Light Emitting Diode
GOVERNMENT POLYTECHNIC, BERHAMPUR

2. CONTENT
INTRODUCTION
ELECTROLUMINESCENCE
WHAT IS AN OLED?
HISTORY
FEATURES OF OLED
WORKING PRINCIPLE
OLED STRUCTURE
TYPES OF OLEDs.
ADVANTAGES OF OLED
DIS-ADVANTAGES OF OLED
APPLICATIONS OF OLED
CONCLUSION

3. INTRODUCTION
Organic light emitting diode.
Emerging technology for display services.
Main principle behind OLED technology is electroluminescence.
It offers lighter, brighter, thinner, high contrast & flexible displays.

4. ELECTROLUMINESCENCE
Electroluminescence is a process in which a material emits light in
response to the electrical field applied across it.

5. LG SIGNATURE OLED TV

6. WHAT IS AN OLED?
An OLED is any light emitting diode in which organic layers are
responsible for light emission.
OLEDs are solid state devices composed of thin films of organic
molecules that is 100 to 500 nanometers thick.
They doesn’t require any backlight, i.e. they are self-emitting.
They are made from carbon and hydrogen.

7. HISTORY
The first OLED device was developed by Eastman Kodak in 1987.
In 1996, Pioneer produced the world’s first commercial PMOLED.
In 2000, many companies like Motorola, LG etc developed various
displays.
In 2001, Sony developed world’s largest full color OLED.
In 2010 & 2011, many companies announced AMOLED displays.

8. FEATURES
Flexibility.
Emissive technology.
Light weight and thin.
Low power consumption.
High contrast, brighter and perfect display from all angles.

9. Emissive Layer : Transports electrons from
anode layers.
Cathode Layer : Injection of electrons when
current flows through.
Substrate Layer : Thin sheet of glass with a
transparent conductive layer. It supports OLED
structure.
Anode Layer : Active layer & removes
electrons. Electrons are replaced by electron
holes.
Conductive Layer : Hole transport layer.
Transports hole from anode layer.
OLED STRUCTURE

10. WORKING PRINCIPLE
A voltage is applied across the anode and cathode.
Current flows from cathode to anode through the organic layers.
Electrons flow to emissive layer from the cathode.
Electrons are removed from conductive layer leaving holes.
Holes jump into emissive layer.
Electron and hole combines and light emits.

11. CONT…

12. CONT…

13. TYPES OF OLEDs
Passive matrix OLED
Active matrix OLED
Transparent OLED
Top-emitting OLED
Foldable OLED
White OLED

14. ADVANTAGES OF OLED
Very thin panel of approximately 1mm.
Low power consumption.
High brightness.
High contrast ratio of 10000:1
Wide viewing angle of 170 degree.
Foldable display panel.
Faster response time.

15. CONT…

16. DIS-ADVANTAGES OF OLED
Lifespan.
Expensive.
Susceptible to water.
Balancing color is not easy.
Overcome multi-billion dollar LCD market.

17. APPLICATIONS OF OLED
OLED TV.
Mobile phones with OLED screens.
Smart watch with OLED screens.

18. CONT…

19. CONCLUSION
Limited use caused by degradation of materials.
OLED will replace current LED and LCD technologies.
Expensive.
Flexibility and thinness will enable many applications.

20. REFERENCE
https://www.slideshare.net/kevinpatel10/oled-all-you-need-to-know
Whttps://studymafia.org/oled-technology-seminar-ppt-with-pdf-
report/

21. Any queries???

22. Thank You!!!
I hope that you all learned something from this
presentation.