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You are here:Home » Organic Light Emitting Diode : OLED Details

By Abhishek Ghosh May 21, 2012 11:46 am Updated on May 21, 2012

Organic Light Emitting Diode : OLED Details

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Organic light emitting diode is a luminous thin film component of organic semiconductor materials, which differs from the inorganic light emitting diodes (LED) in that the current density and luminance are low and no single-crystal materials are required in case of Organic Light Emitting Diode. Compared to conventional (inorganic) light emitting diodes, organic light-emitting diode can therefore be produced at cheaper rate, their life is actually lower than that of conventional LEDs. Organic Light Emitting Diode technology is intended primarily for displays (like TV, computer monitors) and retail display. Another application is large area lighting. Due to the materialistic property, it is possible to use Organic Light Emitting Diode as flexible screen like an electronic paper.

 

Technology behind Organic Light Emitting Diode or OLED

 

A typical Organic Light Emitting Diode is composed of multiple organic layers. Organic Light Emitting Diode is usually on the anode, which is located on a glass sheet. This layer of Organic Light Emitting Diode is referred as emitter layer. At the end, a cathode consisting of a metal or an alloy under high vacuum is used. As a protective layer and to reduce the injection barrier for electrons is between the cathode usually a very thin layer of lithium fluoride , cesium fluoride is applied.

 

Organic Light Emitting Diode

 

As for nomenclature, polymer produced Organic Light Emitting Diode is usually referred as PLED (polymer light emitting diode). Recently, dye molecules are used in Organic Light Emitting Diode that can be expected to give four times higher efficiency than conventional Organic Light Emitting Diode.

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Advantages and Disadvantages of Organic Light Emitting Diode

 

One advantage of Organic Light Emitting Diode display or OLED display over traditional liquid crystal displays is very high contrast, since they require no backlight : LCDs are only effective as a colored filter, Organic Light Emitting Diode display emit colored light, which performs better for color representation. This method is much more efficient, making Organic Light Emitting Diode sucking less energy. For this reason, Organic Light Emitting Diode TVs are less warm than LCD screens, where much of the backlight power is converted into heat. With low energy requirements, Organic Light Emitting Diode Displays can be put to good use in small portable devices such as laptops, cell phones and MP3 players.

 

The biggest technical problem of Organic Light Emitting Diode is the relatively low durability of some components made ??of organic materials.

 

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Abhishek Ghosh

About Abhishek Ghosh

Abhishek Ghosh is a Businessman, Surgeon, Author and Blogger. You can keep touch with him on Twitter - @AbhishekCTRL.

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