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OLEDSiu Yuen

Steven 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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Introduction◦ History of OLED, Current Event, & How it Works

Manufacturing Processes Materials Displays: OLED vs. LCD/LED

◦ Advantages & Disadvantages Lighting: OLED vs. Conventional Bulbs

◦ Advantages & Disadvantages Future Applications Conclusion References 5 Key Concepts Questions

Outline

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History of OLED

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History of OLED

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Current Event

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How it Works

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

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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. Spin-Casting

◦ Liquid organic material placed on a centrifuge and as it spins it covers the whole substrate.

Manufacturing Processes

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Materials

Conducting polymers• Polyaniline (PANI:PSS)• Polyethylenedioxythiophene

(PDOT:PSS)

Emissive polymers• Polyphenylenevinylene (R-

PPV)• Polyfluorene (PF)

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

Displays: OLED vs. LCD/LED

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

Displays: OLED vs. LCD/LED

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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

Lighting: OLED vs. Bulbs

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Disadvantages◦ High cost of materials◦ Lifespan is too short to make it cost effective

Lighting: OLED vs. Bulbs

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Lighting Illuminating wallpaperFlat panel lighting can fit anywhere i.e. home, office, and transportationLuminescent window glass

DisplayHead-up display (HUD)Laptop monitorResidential video wall

The rear lighting is provided by OLEDs for

the first time on a BMW.

Future Applications

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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.

Conclusion

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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/PEDOT:PSS Transparent Conducting film." Applied Surface Science Jan.16 (2014): n. pag. Elsevier. Web. 20 Apr. 2014. <http://www.journals.elsevier.com/applied-surface-science>.

References

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Blue OLED burn out the fastest. Polymer based OLED can be manufactured

with an inkjet printer. OLED is brighter because it’s not encased in

glass which would absorb light. Substrate doesn’t matter because it’s an

emissive device. Uses multiple layers to produce different

colors.

5 Key Concepts

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Questions?