it is a new invent led used in present time displays of tv,mobile,pc,etc.

1. A.N.A. GROUP OF INSTITUTIONS
OLED
(ORGANIC LIGHT EMITTING DIODE)
SUBMITTED BY-
NITESH KASHYAP
EC 2nd YEAR
1548631005

2. Overview
Introduction
How it works
Structure of OLED
Types of OLED
Advantages &Drawbacks
Conclusion

3. Introduction-What is OLED?
Light emitting diode in which electro-luminiscent layer is a
thin film of organic compounds.Emits light with current
applied to it.
Used to make display and lighting.
No use of backlight like LCD Displays.

4. Introduction-History
1950,Nancy University,France:first observation of
electroluminesence in organic ,materials.
1987:First OLED Device invented by Eastmen Kodak
company by chemists Ching W Tang and Steven Van Slyke.
Nowaday: OLED used in smartphone and TV.
Companies:LG,Samsung…

5. OLED Structure
Composition
•Cathode
•Anode
•Emissive layer
•Conductive layer
•Substrate

6. How it works
• Apply current across electrodes
•Inject electrons from cathode
•Inject holes from anode
•Electrons and holes meet in
Emissive layer

7. •Electrons and holes combine in Emissive layer to form
photons and emit it in form of light.

8. Different types of OLED
•Transparent OLED
•Top-Emitting OLED
•Foldable OLED
•White OLED

9. Advantages and Drawbacks
•Lower power consumption
•Faster refresh rate and better contrast
•Greater brightness
•New display opportunities
•Better durability
•Lighter weight

10. Advantages and Drawbacks
Drawbacks:
•Expensive(new) but in future lot of potential to
be cheaper than LCD
•Limited lifetime but getting better and
better(used in phone screen life now)
•Problem in direct sunlight due to emissive
nature.

11. Conclusion
•Semiconductor made of thin organic film
•Apply current to cathode and anode to inject electrons and holes
•Electrons and holes meet in emission layer to form photon and emit
light
•Different type of OLED such as AMOLED,PMOLED,each has different
properties for different kind of device.
•It has advantages and drawbacks but reasearches make it more and
more advantages than a compromise.

12. Thank you