Huai-Yuan (Michael) TsengEE C235

Organic / flexible electronics◦ Low cost solution process

Spin / drop cast Printing

◦ Large area Plastic substrate

Difficult to scale down to sub-micron feature sizes

Top-down technique – Self align printing

Noh, Y. Y.; Zhao, N.; Caironi, M.; Sirringhaus, H. Nat. Nanotechnol.2007, 2 (12), 784–789. Sele, C. W.; Von Werne, T.; Friend, R. H.; Sirringhaus, H. AdV. Mater.2005, 17 (8), 997–1001

However, low device densities, limited by printing feature size

Large area organics/flexible nanoelectronics◦ High density of nanodevices◦ Addressing

Nanoarrays and crossbars

Beckman, R.; Johnston-Halperin, E.; Luo, Y.; Green, J. E.; Heath, J. R. Science 2005 (310 )p465

Only a single wire conduct

PEDOT:PSS =Poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate)

PDMS Molding

On/off is controlled by switching the conductivity of a transistor channel consisting of PEDOT/PSS in contact with a common electrolyte. Doping and de-doping of PEDOT can result in conductivity changes of up to five orders of magnitude

This work has successfully demonstrate◦ Large area patterning of connected micro/nanolines from the

conducting polymer PEDOT, assembled from fluids◦ Nanotransistors

Large area nanoregistration