My academic seminar for B.tech

1. 1 Organic Light-Emitting Diodes By: Carl Roll No: 03

2. What is an OLED? 2 An OLED is an electronic device made by placing a series of organic thin films between two conductors. When electrical current is applied, a bright light is emitted. A device that is 100 to 500 nanometers thick or about 200 times thinner than a human hair.

3. The OLED Structure 3

4. Manufacturing 4 Vacuum deposition or Vacuum thermal evaporation (VTE) gently heated in a vacuum chamber Organic vapor phase deposition (OVPD) low pressure chamber carrier gas is used Inkjet Printing polymers are sprayed onto substrates

5. How OLEDs Emit Light 5 The battery or power supply of the device containing the OLED applies a voltage across the OLED. An electrical current flows from the cathode to the anode through the organic layers. (an electrical current is a flow of electrons) At the boundary between the emissive and the conductive layers, electrons find holes. The OLED emits light.

6. Types of OLEDs 6 Passive-matrix Active-matrix Transparent Top-emitting Flexible White

7. Passive-Matrix 7 Anode and cathode strips are perpendicularly arranged

8. Active-Matrix 8 Full layer anode and cathode, anode overlays TFT

9. Transparent 9

10. Top-Emitting 10

11. Flexible 11

12. White 12

13. Advantages 13 Thinner, lighter and more flexible Brighter Consume much less power Easier to produce and make into larger sizes Large field of view

14. Disadvantages 14 Lifetime Manufacturing Water

15. Current OLEDs 15

16. Future of OLEDs? 16

17. Reference 17 www.howstuffworks.com www.wikipedia.org www.nytimes.com www.laserfocusworld.com www.jyi.org www.inhabitat.com www.oled-info.com www.proavmagazine.com

18. 18 THANK YOU!