ORGANIC LIGHT EMITTING DIODE [OLED] TECHNOLOGY
Organic Light Emitting Diodes are generally solid state devices which is composed of thin films of organic molecules that are 100 to 500 Nano meters thick. They are self emitting, like LEDS they do not require any backlight and filters. OLED emits light with the application of electricity.
Working of OLED Technology:
- Apply voltage across the anode and cathode.
- The generated current starts flowing from cathode to anode through the organic layers.
- Then from emissive layer of cathode electrons starts to flow.
- Leaving holes in the conductive layer electrons get removed.
- Those holes jump into emissive layer, finally electrons and hole combine and then light will be emitted with the application of electricity.
Features of OLED Technology:
- Light weight
- Consume low power
- They are more efficient, much thinner and has wide viewing angle.
Applications of OLED :
- Computer Screens
- Mobile Screens
- Portable Device Displays
Pros of OLED:
- OLEDs are very thin and light to use. The display qualities are brighter than LEDs , thereby reducing power consumption.
- The light emitting layers are very light in order to make them more flexible.
- Provides a large viewing angle of 170 degrees.
- They maintain high consistency of speed.
- They are less resistive.
- OLEDs have a great picture quality with brilliant colours, infinite contrast and fast response rate.
Cons of OLED:
- The main drawback of OLED is, that they are only usable for limited lifespan.
- The displays of OLED are easily damaged by water, that leads to low adoption in display.
- Expensive manufacturing technologies.
- Limited market availability.
The OLED will replace current LCD and LED technologies and evolve as the display for upcoming generations. When OLED technology reaches its peak, it will be better to improve certain existing limitations of LED and LCD.