Organic LED

1. Mother Teresa institute of Science & Technology
Organic Light Emitting
Diodes (OLED‘s)
Presented by,
Satyanarayana
19C61A0425

2. OLED History

4. 4

5. AN OLED OR ORGANIC LIGHT EMITTING
DIODE IS A LIGHT EMITTING DEVICE
PRINCIPLE OF
OF ORGANIC
BASED ON THE
ELECTROLUMINESCENCE
CRYSTALS.
AN OLED IS A SOLID-STATE
SEMICONDUCTOR DEVICE THAT IS 100 TO
500 NANOMETRES THICK OR ABOUT 200
TIMES SMALLER THAN A HUMAN HAIR.

6. SUBSTRATE.
ANODE.
ORGANIC LAYER:
CONDUCTIVE LAYER (HOLE TRANSPORT LAYER)
EMISSIVE LAYER( ELECTRON TRANSPORT LAYER)
CATHODE.

8. A VOLTAGE IS APPLIED ACROSS THE ANODE AND CATHODE.
CURRENT FLOWS FROM CATHODE TO ANODE THROUGH THE ORGANIC LAYERS.
ELECTRONS FLOW TO EMISSIVE LAYER FROM THE CATHODE.
ELECTRONS ARE REMOVED FROM CONDUCTIVE LAYER LEAVING HOLES.
HOLES JUMP INTO EMISSIVE LAYER .
ELECTRON AND HOLE COMBINE AND LIGHT EMITTED.

9. 9

10.  PASSIVE MATRIX
THERE ARE TWO TYPES OF OLEDS NAMELY:-
ACTIVE MATRIX

12. Flexibility
Ultra-lightweight, thin form
Durability
Brighter images
REVOLUTIONARY FEATURES OF
FAMOLED

13. OLED & LED

14. ADVANTAGES &
DISADVANTAGES
 Light weight & flexible
plastic substrates
 Wider viewing angles &
improved brightness
 Better power efficiency
 Response time
 UV sensitivity
 Less Lifetime
 Expensive Manufacturing
 Susceptible to water
13

15. APPLICATIONS
SMALL SREEN DEVICES:
CELL PHONES
CAMERA
PORTABLE RECORDER
MEDICAL DEVICES
TRANSPARENT LIGHTING DOUBLES AS A WINDOW
LARGE SCREEN DISPLAYS :
 TV SCREENS
COMPUTER MONITOR

16. CONCLUSION
ORGANIC LIGHT EMITTING DIODES ARE EVOLVING AS THE NEXT GENERATION
DISPLAYS.
AS OLED DISPLAY TECHNOLOGY MATURES, IT WILL BE ABLE TO IMPROVE UPON
CERTAIN EXISTING LIMITATIONS OF LCD INCLUDING
HIGH POWER CONSUMPTION
LIMITED VIEWING ANGLES
POOR CONTRAST RATIOS.