Organic Light Emitting Diodes

Gia Quyet Ngo

15.07.2016

2

Outline

• Introduction

• Structure

• Characteristics

• Principle

• Applications

• Limitations

• Conclusion

3

Introduction

What is OLEDs???

http://www.intechopen.com

Cathode

Anode

Electroluminescence

4

Motivation

Why do we need OLEDs?!!

http://www.lg.com/uk/tvs/lg-55EC930V

5http://www.edisontechcenter.org

Basic structure of OLEDs

6

Characteristics of OLEDs

Bernard Geffroy et al., “Review Organic light-emitting diode (OLED) technology: materials, devices and display technologies”, Polymer International 55:572-582 (2006)

7

Characteristics of OLEDs

Bernard Geffroy et al., “Review Organic light-emitting diode (OLED) technology: materials, devices and display technologies”, Polymer International 55:572-582 (2006)

8

Electroluminescent materials

Homer Antoniadis, “Overview of OLED Display Technology”, OSRAM

Technology: Inkjet printing

Technology: Evaporation

Organic materials

Organic materials

9

Principles of OLEDs display

Exciton

Homer Antoniadis, “Overview of OLED Display Technology”, OSRAM

10http://electronics.howstuffworks.com

Display technology

Thin film transistor

11

Applications

http://www.combivap.ch

12

Limitations

• Low operating lifetime.• Expensive.• Damageable with water.• Hard to see in direct sunlight.• Color balance issues.

13

Conclusions

• A breakthrough of next generation displays and lighting.• Challenges to overcome.

What is the next steps???• Better materials.• New manufacturing processes.• QLED (Quantum dots-LED)!!!

14

Any Questions?