ORGANIC LIGHT EMITTING DIODES or OLEDs

presented by S.GAYATHRI(115011013887)

All Rights reserved. Not for distribution. Single user license

B.TECH ECE 2ND YEAR

ORGANIC LIGHT EMITTING DIODES or OLEDs

It differs with low power and Combination of great colors

1

It principles of electroluminiescence2

OLEDs are used to create digital Displays in devices such as cameras etc

3

These are diodes are about 100 to 500Nanometers thick

4

ARCHITECTURE OF OLED TECHNOLOGY

1 Amorphous and crystalline molecules

2 Arranged in irregular pattern

3 It has many thin layers of organic materials

4 There are several thin and functional layers

It can be achieved by using multi-layered devices5

TYPES OF OLED LAYERS

2

CATHODELAYER

1ANODELAYER

3CONDUCTIVE

LAYER

4

EMISSIVELAYER

5SUBSTRATE

LAYER

SUBSTRATE LAYER

EMISSIVE LAYER

CATHODE LAYER

ANODE LAYER

4 Layers stacked up

1.It is an active layer and removes electron

2.Making of this layer is done by barium calcium etc

3. It is made of organic plastic molecules

4.This substrate supports the OLED structure

WORKING OF OLED

Anode and cathode are

used for OLEDs

Emissive layer becomes negative charger

Conductive layer become

positive charger

OLEDs also work as diodes if

current flows in correct direction

To creates radiation that

varies in frequency

range

This may lead to change in

electrical levels

Due to electrostatic

forces applied, the electrons

move the

Positive conductive

layerNegative

emissive layer

They are helpful in

conducting

TYPES OF OLEDs

PASSIVE OLED:

OLEDs are easy to makeACTIVE MATRIX OLED:

OLED requires thin film transistor

It is used in efficient lighting systems

WHITE OLED:

FOLDABLE OLED:

OLEDs are made up of flexible foil

APPLICATIONS OF OLED DISPLAY TECHNOLOGY

1 TVs

2 Cell phone screens

3 Computer screens

4keyboards

5Lights

6Portable device

7Smart card

8Light source

OLEDTECHNOLOGY

it helpful For

Marketresearch

OLED is increasing

many products

growing number of electronic

devices

Comparing to liquid crystal displays OLED is use less power.

CONCLUSION