OLED

Izvor: KiWi

A Natural Light Emitting Diode or OLED can be an electronic system that emits light each time a voltage is applied across its terminals. Since organic compounds are used using levels within the device, it is known as an Organic LED, in the place of standard LEDs which use inorganic compounds. Because some layers are conductive and some are resistive in nature, the device is recognized as an organic semi-conductor.

The unit may be used in the production of visual display screens for televisions, computer monitors and notebooks, ad display boards, and display monitors in information kiosks.

While LCDs (Liquid Crystal Displays) that are commonly in use nowadays need a to illuminate the screen, an OLED has no need for this. This considerably reduces the power dependence on OLEDs which may function for an extended time in the same battery source. Furthermore, the lack of the circuitry allows the display system to become much thinner than traditional displays.

OLED operation url

These devices typically consists of a layer, an, an layer and a cathode. When a is applied across the device making the anode positive and the cathode negatively charged, an electrical current starts to move through the device. The cathode emits electrons towards the emissive layer, while the anode pulls electrons in the conductive layer. This is also analogous to the anode providing electron pockets for the conductive layer. The electrons and the holes are pushed towards one another because of the voltage applied across the device, and they blend together at the emissive layer which results in an radiation whose frequency is within the visible range. Thus light is observed to be produced in the OLED. This phenomenon is referred to as electro-fluorescence. Various organic compounds are used inside the levels to build different colors of light.