Organic Semiconductors

Organic semiconductors from Sumitomo Chemical can be supplied as an ink in eco-friendly non-halogenated solvent.
Organic semiconductor films can be formed on plastic substrates by printing processes at low temperature and in air. Light-weight and flexible electric devices can be realized.

Applications

Organic semiconductors enable many printed electronics applications to be envisaged such as sensors, circuits, displays and wearable devices.

Hand-held Medical Devices

Wearable Devices

  • Sensors: transducer elements for bio-sensors in medical applications.
  • Circuits: logic gates, amplifiers and circuitry for sensor applications.
  • Displays: select and drive pixel transistors.
  • Development of OTFTs into applications such as logic
  • Low voltage inverter produced with Vdd/Vss set at +6V/-6V respectively with examples of corresponding V in / V out waveforms

Low voltage inverter operation

Features of materials and process

Example CDT test cell device on plastic (to source/drain level).
Lithographically defined electrodes to 5μm channel length resolution

device structure of organic transistor

Transistor performance

Top gate OSC material performance
Average saturation mobility (cm2/Vs) at [channel length] 1.0 - 4.0
[L=5-100μm]
On/off current ratio 105
Phase property Semi-crystalline
Sub-threshold slope (V/decade) 0.9(L=10μm)

Low voltage device example: Implementation of our OSC for 10V operation

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