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OLEDs emit light in a manner

- Aug 16, 2018 -

                                                        OLEDs emit light in a manner 


OLEDs emit light in a manner similar to LEDs and undergo a process called electrophosphorescence.

The specific process is as follows:

1.The battery or power supply of the OLED device will apply a voltage across the OLED.

 

2. Current flows from the cathode to the anode and through the organic layer (current refers to the flow of electrons).

3. The cathode outputs electrons to the organic molecular emission layer.

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4. The anode absorbs electrons from the organic molecular conduction layer. (This can be seen as the anode outputs holes to the conductive layer, and the effects are equal.

5. At the junction of the emissive layer and the conductive layer, electrons will combine with the holes.


6. When an electron encounters a hole, it fills a hole (it will fall into an energy level in the atom of the missing electron).

7. When this process occurs, electrons release energy in the form of photons.


8, OLED lighting.

9. The color of the light depends on the type of organic molecules in the emissive layer. The manufacturer will place several organic films on the same OLED to form a color display.


10. The brightness or intensity of light depends on the amount of current applied. The higher the current, the higher the brightness of the light.