Flexible Organic Light Emitting Diode (OLED)

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Flexible Organic Light Emitting Diode (OLED)

• MEEN 3344
• Presented by Hector Vasquez Jr.

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What is an OLED
A picture is worth a thousand words

• What is a video worth

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OLEDs other uses
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What is the OLED made of and how it is structured

• The OLED is made by layers. It consists of a
  substrate which is made of glass, clear plastic,
  or foil. The substrate is used to support the
  OLED. The anode is made of natural graphite
  particles, which is transparent and is the second
  layer. The anode layer removes electrons and
  adds electron holes when a current flows into the
  devices.

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What is the OLED made of and how it is structured

• The third layer is the conducting layer. This
  layer is made of organic plastic molecules and
  removes the electron holes from the anode. The
  fourth layer is emissive layer. This layer is
  also composed of organic plastic molecules, but
  has a different function. The emissive layer
  removes electrons from the cathode layer which
  causes light to be made. The final layer is the
  cathode. Cathode is made of tungsten but can be
  made with other materials. It releases
  electrons when a current flows into the device.

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How does it work

• OLED do not have a backlight unlike liquid
  crystal display (LCD). OLED create light by the
  following process A battery or power supply
  sends a voltage through the OLED. An electrical
  current flows from the cathode to the organic
  layer and anode. As explained earlier, the anode
  removes electrons and adds electron holes in the
  conductive layer. Between the organic layers is
  where electrons fill the holes and give off
  energy in the form of photon light.

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Reference

• Allen , David (2007,April,12). Sony show off the
  OLED 11 inch screen TV. Retrieved February 8,
  2008, from turbo GADGETS Web site
  http//www.turbogadgets.com/2007/04/12/sony-show-o
  ff-the-oled-11-inch-screen-tv/
• Anonymous, (2007,July, 18). fossil oled
  multi-color digital watches revealed. Retrieved
  February 8, 2008, from technabob Web site
  http//technabob.com/blog/2007/07/18/fossil-oled-m
  ulti-color-digital-watches-revealed/
• Anonymous, (2003). MARCH 2003. Retrieved February
  8, 2008, from Supervideo Web site
  http//www.supervideo.com/2003c.htm
• Berardini , César A. (2006, January 04). The
  TeamXbox.com Guide to HDTV. Retrieved February 8,
  2008, from IGN Entertainment, Inc Web site
  http//features.teamxbox.com/xbox/1427/The-TeamXbo
  xcom-Guide-to-HDTV/p5/
• Freudenrich, Craig (2007). How OLEDs Work.
  Retrieved January 19, 2008, from How Stuff Works
  Web site http//electronics.howstuffworks.com/ole
  d.htm/printable
• Lebedev, Art (2005, Sep, 19). Future Look The
  Optimus Organic LED keyboard. Retrieved February
  8, 2008, from Legit Editorial Reviews Web site
  http//www.legitreviews.com/article/247/1/
• Willaims, Martin (2007, January, 01 ). Sony's
  Flexible OLED. Retrieved February 8, 2008, from
  Google video Web site http//video.google.com/vid
  eoplay?docid935742034054120610qOLEDprgoog-sl