1. OLED Devices and Applications
By Sarkis Arabyan
12/4/08

2. Outline Motivation How OLED works Types of OLEDs
Advantages and Challenges
Current and Future Applications

3. Motivation
41 in Samsung Prototype

4. How OLED Works
Cathode
Emissive Layer
Conductive Layer
Anode
Substrate

5. How OLED Works Voltage applied across Cathode and Anode
Typically 2V-10V
Current flows from cathode to anode
Electrons flow to emissive layer
Electrons removed from conductive layer leaving holes
Holes jump into emissive layer
Electron and hole combine and light emitted

6. How OLED Works Different Colors Intensity/brightness
type of organic molecule in the emissive layer
3 molecules used -RGB
Intensity/brightness
amount of current

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

8. 1. Passive-Matrix OLED (PMOLED)
Perpendicular cathode/anode strip orientation
Light emitted at intersection (pixels)
External circuitry
Turns on/off pixels
Large power consumption
Used on 1-3 inch screens
Alphanumeric displays

9. 2. Active-Matrix OLED (AMOLED)
Full layers of cathode, anode, organic molecules
Thin Film Transistor matrix (TFT) on top of anode
Internal circuitry to determine which pixels to turn on/off
Less power consumed then PMOLED
Used for larger displays

10. 3. Transparent OLED TOLED
Transparent substrate, cathode and anode
Bi-direction light emission
Passive or Active Matrix OLED
Useful for heads-up display
Transparent projector screen
glasses

11. 4. Top-emitting OLED TEOLED
Non-transparent or reflective substrate
Transparent Cathode
Used with Active Matrix Device
Smart card displays

12. 5. Foldable OLED Flexable metalic foil or plastic substrate
Lightweight and durable
Reduce display breaking
Clothing OLED

13. 6. White OLED Emits bright white light Replace fluorescent lights
Reduce energy cost for lighting
True Color Qualities

14. 6. White OLED
Cellphone backlight white OLED vs standard LED from Organic Lighting Technologies LLC

15. OLED Advantages over LED and LCD
Thinner, lighter and more flexible
Plastic substrates rather then glass
High resolution (<5um pixel size) and fast switching (1-10um)
Do not require backlight, light generated
Low voltage, low power and emissive source
Robust Design (Plastic Substrate)
Larger sized displays
Brighter- good daylight visibility
Larger viewing angles -170o

16. OLED Disadvantages Lifetime Expensive Susceptible to water
White, Red, Green  46, ,000 hours
About 5-25 years
Blue  14,000 hours
About 1.6 years
Expensive
Susceptible to water
Overcome multi-billion dollar LCD market

17. Applications Samsung Roadmap 2009 - 14,15, and 21 inch OLED panel
Kodak LS633 EasyShare with OLED display
The Sony 11-inch XEL-1 OLED TV
Samsung Roadmap
,15, and 21 inch OLED panel
to 42 inch full HD OLED panel
Toshiba Roadmap
2009 – 30 inch Full HD panel

18. Applications
From OLED Technology Roadmap

19. Applications World’s First OLED Lamp
A 2'x2' white light prototype by GE
World’s First OLED Lamp

20. Applications

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

22. Work Cited
Bardsley, James. "International OLED Technology Roadmap." IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS. Jan IEEE. < arnumber= >.
Freudenrich, Craig, Ph.D. "How OLEDs Work." Howstuffworks <
OLED-info. "OLED Lights and Sony OLEDs." OLED displays and television resources, info and news <
Organic Lighting Technologies. "Technology." Organic Lighting Technologies LLC < lite.com/technology.htm>.

23. Q&A
Thank You!