Semiconducting inks

The viscosity and surface tension of the ink are the most important factors for inkjet printing. Viscosity should not exceed 20 cP for easy, optimum ejection from the nozzle. Surface tension is responsible for the globular shape of the ink droplets applied to the substrate. It is typically in the 28 to 350 mN/m range. There are enough different inks available on the market to render the inkjet process highly versatile. For example, conductive, dielectric, and semiconductive inks are all available for use [24, 28,110]. 

Fig. 4.17 Examples of different semiconducting polymers in solution. These colored solutions can be thought of as functional inks" and applied to substrates using the methods of modern printing technology.

The colored liquids in Fig. 4.17 are examples of different semiconducting polymers in solution. These colored solutions can be thought of as functional inks and applied to substrates using the methods of modern printing technology. Inkjet printing appears to be an ideal way to deposit the red, green and blue pixels of a full-color display. Fig. 4.18 illustrates this remarkable opportunity. 

Ogier, S.D., Veres, J., and Zeidan, M. (2007) Patent No. WO/2007/082584. Electronic component or device usefiil in ink jet printing comprises gate electrode, source electrode, drain electrode and organic semiconducting material between source and drain electrode where device has specific charmel length. 

High-performance semiconducting nanotube inks progress and prospects. ACS Nano, 5, 8471-8487. 

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