OLEDORGANIC LIGHT EMITTING DIODE.

BY:DIVYANSHU BHUSHAN

C.S.E. A1,3rd YR.

1103510019

Outline

What is OLED How OLED works Types of OLEDs Flexible OLEDs How FOLEDs works Advantages and Challenges Sequitur (Conclusion)

INTRODUCTION (An OLED (organic light-emitting diode) is a light-emitting

diodeLED) in which the emissive electroluminescent layer is a film of organic compound which emits light in response to an electric current.

This layer of organic semiconductor is situated between two electrodes. Generally,at least one of these electrodes is transparent.

OLEDs are used to create digital displays in devices such as television screens, computer monitors,portable systems such as mobile phones, handheld games consoles and PDAs

How OLED Works Cathode Emissive Layer Conductive Layer Anode Substrate

OLED is a display device that sandwiches carbon based films between the two electrodes and when voltage is applied creates light.

www.ol-ed.com

How OLED Works1. Voltage applied across

Cathode and Anode1. Typically 2V-10V

2. Current flows from cathode to anode

1. Electrons flow to emissive layer

2. Electrons removed from conductive layer leaving holes

3. Holes jump into emissive layer

3. Electron and hole combine and light emitted

Types of OLEDs

Passive-matrix OLED Active-matrix OLED Transparent OLED Top-emitting OLED Foldable OLED White OLED

FLEXIBLE OLED

What the Flexible Organic Light Emitting Diode Consist of :

The Top Layer is the Cathode layer made of tungsten releases electrons when current is run through it.

Emissive Layer removes electrons from the cathode layer to make light.

Conductive layer is made from a type of organic plastic that removes the electron wholes

Then the Anode Layer that consist of removing and adding electron holes while the current is running through it and is made from graphite particles

Followed by the Substrate layer is used to support the Organic LED and is made up of glass, clear plastic

Commercial Uses of the Organic LED

Some Advantages of Using Organic LED’s

The Flexible Organic LED is easily mass produced because of its unique ability to be printed out on Ink Jet printers and sometimes Screen Printing Technologies.

The enable people to see a wide ranged of colors and sit from almost any angle without degrading the picture quality even at 90 degree angles.

It also has the unique ability to use less energy because of how its made up and has better response time than other LED’s.

The problem of the longevity of the Organic LED has been over come by adding a thin sheet of metal in with it.

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

Shorter Lifetime (approx 5-10 yrs) Expensive Susceptible to water Overcome multi-billion dollar LCD

market

Corporations in OLED’sCorporations in OLED’s

Small Molecule

Kodak IBM UDX Ritek Samsung Polymer CDT Dupont Philips Dow Chemicals

Market Forecast

SEQUITUR

OLED is a display device that sandwiches carbon based films between the two electrodes and when voltage is applied creates light.

OLED has many advantages over LCDs.

In coming future it will acquire the market due to its qualities.

The dynamic interplay of chemistry with device physics results in these remarkable displays.

References

http://www.inhabitat.com/samsungs-super-sleek-31-oled-tv

www.universaldisplay.com

www.google.com/ www.googleimages.com

www.wikipedia.org

www.isuppli.org