23-03-2011, 11:42 AM
PRESENTED BY:
Vinit tak
IEEE seminar on organic electronics.pptx (Size: 2.08 MB / Downloads: 190)
Organic Electronics
Organic electronics, or plastic electronics, is the branch of electronics that deals with conductive polymers, which are carbon based.
Inorganic electronics, on the other hand, relies on inorganic conductors like copper or silicon.
Why Organic?
Advantages
Organic electronics are lighter, more flexible
Low-Cost Electronics
No vacuum processing
No lithography (printing)
Low-cost substrates (plastic, paper, even cloth…)
Direct integration on package (lower insertion costs)
Why Organic?
Comparison Example
Cost
Fabrication Cost
Device Size
Material
Required Conditions
Process
Organic Electronic
$5 / ft2
Low Capital
10 ft x Roll to Roll
Flexible Plastic Substrate
Ambient Processing
Continuous Direct Print $100 / ft2
$1-$10 billion
< 1m2
Rigid Glass or Metal
Ultra Clean room
Multi-step Photolithography
How do molecules act as semiconductors?
We have:
• bound electrons between the atoms in the ring (sp2)
• A cloud of partly free electrons above and below the ring (p-electrons)
Organic Light Emitting Diodes (OLEDs)
• An OLED is a thin film LED in which the emissive layer is an organic compound.
• When this layer is polymeric (or plastic), OLEDs can be deposited in rows and columns on a screen using simple printing methods that are much more efficient than those used in manufacturing traditional LEDs.
• A key benefit of OLEDs is that they don’t need a backlight to function.
How it Works
• An electron and hole pair is generated inside the emissive layer by a cathode and a transparent anode, respectively.
• When the electron and hole combine, a photon is produced, which will show up as a dot of light on the screen.
• Many OLEDs together on a screen make up a picture
• Less expensive to produce
• Wide range of colors and viewing angle
• Consumes much less energy than traditional LCDs.
• Flexible and extremely thin
• Limited lifetime of about 1,000 hours.
• Susceptible to water
Organic transistors
• INTRODUCTION
Organic transistors are transistors that use organic molecules rather than silicon for their active material. This active material can be composed of a wide variety of molecules.
• Advantages of organic transistors:
– Compatibility with plastic substances
– Lower temperature is used while manufacturing (60-120°C)
– Lower cost and deposition processes such as spin-coating, printing and evaporation
– Less need to worry about dangling bonds( simplifies the process)
• Disadvantages of organic transistors:
– Lower mobility and switching speeds compared to Si wafers
– Usually does not operate under invasion mode.
Vinit tak
IEEE seminar on organic electronics.pptx (Size: 2.08 MB / Downloads: 190)
Organic Electronics
Organic electronics, or plastic electronics, is the branch of electronics that deals with conductive polymers, which are carbon based.
Inorganic electronics, on the other hand, relies on inorganic conductors like copper or silicon.
Why Organic?
Advantages
Organic electronics are lighter, more flexible
Low-Cost Electronics
No vacuum processing
No lithography (printing)
Low-cost substrates (plastic, paper, even cloth…)
Direct integration on package (lower insertion costs)
Why Organic?
Comparison Example
Cost
Fabrication Cost
Device Size
Material
Required Conditions
Process
Organic Electronic
$5 / ft2
Low Capital
10 ft x Roll to Roll
Flexible Plastic Substrate
Ambient Processing
Continuous Direct Print $100 / ft2
$1-$10 billion
< 1m2
Rigid Glass or Metal
Ultra Clean room
Multi-step Photolithography
How do molecules act as semiconductors?
We have:
• bound electrons between the atoms in the ring (sp2)
• A cloud of partly free electrons above and below the ring (p-electrons)
Organic Light Emitting Diodes (OLEDs)
• An OLED is a thin film LED in which the emissive layer is an organic compound.
• When this layer is polymeric (or plastic), OLEDs can be deposited in rows and columns on a screen using simple printing methods that are much more efficient than those used in manufacturing traditional LEDs.
• A key benefit of OLEDs is that they don’t need a backlight to function.
How it Works
• An electron and hole pair is generated inside the emissive layer by a cathode and a transparent anode, respectively.
• When the electron and hole combine, a photon is produced, which will show up as a dot of light on the screen.
• Many OLEDs together on a screen make up a picture
• Less expensive to produce
• Wide range of colors and viewing angle
• Consumes much less energy than traditional LCDs.
• Flexible and extremely thin
• Limited lifetime of about 1,000 hours.
• Susceptible to water
Organic transistors
• INTRODUCTION
Organic transistors are transistors that use organic molecules rather than silicon for their active material. This active material can be composed of a wide variety of molecules.
• Advantages of organic transistors:
– Compatibility with plastic substances
– Lower temperature is used while manufacturing (60-120°C)
– Lower cost and deposition processes such as spin-coating, printing and evaporation
– Less need to worry about dangling bonds( simplifies the process)
• Disadvantages of organic transistors:
– Lower mobility and switching speeds compared to Si wafers
– Usually does not operate under invasion mode.