OLED Siu Yuen Steven Donoso 5-7-14

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OLEDSiu YuenSteven Donoso5-7-14

• Abstract
• An OLED is not just an LED that uses organic
  material, it is superior to LED in several ways.
  To begin with it is lighter, thinner, brighter,
  and has lower power consumption. The major
  drawbacks right now are the cost of manufacturing
  and lifespan of the device. However, in the near
  future these problems will be resolved.

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Outline

• Introduction
• History of OLED Device Structure
• Displays OLED vs. LCD/LED
• Advantages Disadvantages
• Lighting OLED vs. Conventional Bulbs
• Advantages Disadvantages
• Future Applications
• Conclusion
• References
• 5 Key Concepts
• Questions

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History of OLED
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How it Works
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Manufacturing Processes

• Vacuum thermal evaporation (VTE)
• Uses vacuum to heat up and evaporate the organic
  material and have it condense into film on a cool
  substrate. 
• Organic vapor phase deposition (OVPD)
• Low pressure, hot-walled reactor chamber using
  carrier gas to carry the evaporated organic
  material to a cool substrate to condense into
  film.
• Inkjet printing
• Spray the organic materials as film on the
  substrate.

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Manufacturing Processes

• Dimensions
• Red (625 nm) and green (530 nm) diodes, and blue
  diodes (430 nm).
• Lifespan
• From 40K-100K hrs. (14K for blue light).

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Manufacturing Processes

• Vacuum thermal evaporation (VTE)
• Uses vacuum to heat up and evaporate small
  organic molecular materials and have it condense
  into film on a cool substrate. 
• Organic vapor phase deposition (OVPD)
• Low pressure, hot-walled reactor chamber using
  carrier gas to carry the evaporated organic
  material to a cool substrate to condense into
  film.
• Inkjet printing
• Spray long chained organic polymer materials as
  film on the substrate.

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Displays OLED vs. LCD/LED

• Advantages of OLED
• Lower power usage
• Faster refresh rate and better contrast
• Brighter
• Better durability
• Simple design
• Lighter weight
• New screen types
• Viewing angle

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Displays OLED vs. LCD/LED

• Disadvantages of OLED
• Costs
• Life expectancy
• Operation under bright light
• Size limit

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Lighting OLED vs. Bulbs

• Advantages of OLED
• Thinner and lightweight
• Lower power consumption
• Can be used on transparent or reflective surface
  (mirror or window)
• Cooler to the touch
• Dimmable
• No mercury
• Flexible and can be
• cut into any shape

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Lighting OLED vs. Bulbs

• Disadvantages
• High cost of materials
• Life is too short to make it cost effective

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Future Applications

• Lighting
• Illuminating wallpaper
• Flat panel lighting can fit
• anywhere i.e. home, office,
• and transportation
• Luminescent window glass
• Display
• Head-up display (HUD)
• Laptop monitor
• Residential video wall
• The rear lighting is provided by OLEDs for
• the first time on a BMW.

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Conclusion

• OLED is a very appealing technology since it has
  good energy efficiency, many different uses, and
  no harmful materials toward humans. Although
  there are still some problems with this
  technology like the manufacturing costs and its
  lifespan. However, within a decade or so most if
  not all of these problems would be solved.

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References

• Tsujimura, Takatoshi. OLED Display Fundamentals
  and Applications. Hoboken, NJ Wiley, 2012.
  Print.
• Denison, Caleb. "OLED vs. LED Which Is the
  Better TV Technology?" Digital Trends. N.P., 20
  Aug. 2013. Web. 19 Apr. 2014.
• "OLED-Info Is the Web's Leading Resource on OLED
  TVs, Displays and Lighting." OLED Info. N.p.,
  2013. Web. 19 Apr. 2014.
• "HowStuffWorks "How OLEDs Work"" HowStuffWorks.
  N.p., n.d. Web. 04 May 2014.
• Wu, Xiaoxiao, Fushan Li, Wei Wu, and Tailiang
  Guo. "Flexible White Phosphorescent Organic Light
  Emitting Diodes Based on Multilayered
  Graphene/PEDOTPSS Transparent Conducting ?lm."
  Applied Surface Science Jan.16 (2014) n. pag.
  Elsevier. Web. 20 Apr. 2014. lthttp//www.journals.
  elsevier.com/applied-surface-sciencegt.

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5 Key Concepts

• Blue OLED burn out the fastest.
• Polymer based OLED can be manufactured with an
  inkjet printer.
• OLED is brighter because its not incased in
  glass which would reflect light.
• Substrate doesnt matter because its an emissive
  device.
• Uses multiple layers to produce different colors.

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Questions?
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