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OLED Devices and Applications. By Sarkis Arabyan 23449826 12/4/08. Outline. Motivation How OLED works Types of OLEDs Advantages and Challenges Current and Future Applications. Motivation. 41 in Samsung Prototype. How OLED Works. Cathode Emissive Layer Conductive Layer Anode

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oled devices and applications

OLED Devices and Applications

By Sarkis Arabyan

23449826

12/4/08

outline
Outline
  • Motivation
  • How OLED works
  • Types of OLEDs
  • Advantages and Challenges
  • Current and Future Applications
motivation
Motivation

41 in Samsung Prototype

how oled works
How OLED Works
  • Cathode
  • Emissive Layer
  • Conductive Layer
  • Anode
  • Substrate
how oled works1
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
how oled works2
How OLED Works
  • Different Colors
    • type of organic molecule in the emissive layer
    • 3 molecules used -RGB
  • Intensity/brightness
    • amount of current
types of oleds
Types of OLEDs
  • Passive-matrix OLED
  • Active-matrix OLED
  • Transparent OLED
  • Top-emitting OLED
  • Foldable OLED
  • White OLED
1 passive matrix oled pmoled
1. Passive-Matrix OLED (PMOLED)
  • Perpendicular cathode/anode strip orientation
  • Light emitted at intersection (pixels)
  • External circuitry
    • Turns on/off pixels
  • External circuitry
  • Large power consumption
    • Used on 1-3 inch screens
    • Alphanumeric displays
2 active matrix oled amoled
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
3 transparent oled toled
3. Transparent OLEDTOLED
  • Transparent substrate, cathode and anode
  • Bi-direction light emission
  • Passive or Active Matrix OLED
  • Useful for heads-up display
    • Transparent projector screen
    • glasses
4 top emitting oled teoled
4. Top-emitting OLEDTEOLED
  • Non-transparent or reflective substrate
  • Transparent Cathode
  • Used with Active Matrix Device
  • Smart card displays
5 foldable oled
5. Foldable OLED
  • Flexable metalic foil or plastic substrate
  • Lightweight and durable
  • Reduce display breaking
  • Clothing OLED
6 white oled
6. White OLED
  • Emits bright white light
  • Replace fluorescent lights
  • Reduce energy cost for lighting
  • True Color Qualities
6 white oled1
6. White OLED

Cellphone backlight white OLED vs standard LED from Organic Lighting Technologies LLC

oled advantages over led and lcd
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
oled disadvantages
OLED Disadvantages
  • Lifetime
    • White, Red, Green  46,000-230,000 hours
      • About 5-25 years
    • Blue  14,000 hours
      • About 1.6 years
  • Expensive
  • Susceptible to water
  • Overcome multi-billion dollar LCD market
applications
Applications

Kodak LS633 EasyShare with OLED display

The Sony 11-inch XEL-1 OLED TV

  • Samsung Roadmap
    • 2009 - 14,15, and 21 inch OLED panel
    • 2010 - 40 to 42 inch full HD OLED panel
  • Toshiba Roadmap
    • 2009 – 30 inch Full HD panel
applications1
Applications

From OLED Technology Roadmap

applications2
Applications

A 2'x2' white light prototype by GE

World’s First OLED Lamp

applications3
Applications

http://www.oled-info.com/buy-oled

conclusions
Conclusions
  • Limited use caused by degradation of materials.
  • OLED will replace current LED and LCD technologies
  • Expensive
  • Flexibility and thinness will enable many applications
work cited
Work Cited
  • Bardsley, James. "International OLED Technology Roadmap." IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS. Jan. 2004. IEEE. <http://ieeexplore.ieee.org/stamp/stamp.jsp? arnumber=01288066>.
  • Freudenrich, Craig, Ph.D. "How OLEDs Work." Howstuffworks. 2008. <http://electronics.howstuffworks.com/oled.htm>.
  • OLED-info. "OLED Lights and Sony OLEDs." OLED displays and television resources, info and news. 2008. <http://www.oled-info.com/>.
  • Organic Lighting Technologies. "Technology." Organic Lighting Technologies LLC. 2006. <http://www.o- lite.com/technology.htm>.
slide23

Q&A

Thank You!