Transcript Polymer Electronics

Part 2
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Fabrication of organic thin film transistors
Non-volatile memory devices based on organic transistors
Development of novel conjugated polymers for photovoltaic device
applications
Fabrication of organic photovoltaic cells
Fabrication of organic light-emitting devices (OLED)
Ferroelectric polymers for thin film devices
Gene Sensors
Printed Electronics
Conducting Polymer Actuators and Micropumps
Responsive Membranes/Hybrid Plastics
 focused upon polymer membranes that incorporated electronically
conducting polymers and piezoelectric polymers
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http://www.research.philips.com/newscenter/pictures/ldm-polelec.html
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Flexoprinting: a high pressure method that is especially well
applicable to print on plastic substrates
 Offset printing: a flat printing technique that makes a high
resolution possible
 Gravure printing: a low pressure printing method that
makes high volumes and the use of organic dissolvent
possible
 Rotary screen printing: a method that allows to print in
thick layers
 Coating methods: diverse methods to apply homogeneous
and thin layers
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Clean room process - During preparation,contamination might be
introduced in the form of salts, polysiloxanes and dust particles
 spin coating, photo lithography, evaporation, wet etching and others
are used for the basic development of polymer electronics
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Lab Printing Process – Lab type "desktop" printing machines for pad
printing, doctor blading and gravure printing as well as screen printing
and others are used to develop the basic printing processing know-how
for printed electronics
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Production Process - Production scale printing process such as
flexography printing, offset printing, gravure printing, screen printing
and others are used to produce printed electronic products for low cost
high volume applications
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EECE 487 Spring 2009
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Companies have already commercialized the polymer
electronic technology
 PolyIC offers two product lines:
▪ PolyID® for printed RFID (radio frequency identification) tags
for contactless identification of products
▪ PolyLogo® for printed Smart objects (combined systems of
different polymer electronics components)
 Printed electronics makes low-cost RFID tags possible that can
be used for mass applications. Furthermore, this new
technology is also used in displays and complex systems, called
smart objects.
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EECE 487 Spring 2009
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Advantages
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 Manufacture w/ relative
simple and inexpensive
equipment at low cost
 Light weighted and flexible,
very durable under stress and
flex
 Can be easily applied over a
large surface area
 Freedom of choice of their
chemical composition
 Adaptable in various ways
because of printing
methods that can be
adjusted to current
requirements quickly
(printed electronics)
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EECE 487 Spring 2009
Disadvantages
 Due to their intrinsic physical
properties (i.e. limited
mobility of charge carriers),
the performance of polymer
electronic products lacks the
speed of its silicon
counterpart
 Research is still on going to
increase performance for
more complex functionality
 To be able to improve
performance one should be
able to distinguish between
problems introduced during
preparation, intrinsic material
properties, and device
characteristics
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Research in polymer electronics began in 1970s
 Conductive polymer doped with iodine
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Polymer electronics have the same building blocks as
conventional electronics – transistors (OFETs), diodes,
capacitors, inverters, and polymer ring oscillators
Applications include organic photovoltaic cells, organic light
emitting devices (OLED), polymer transistors, printed
electronics and many more
Polymer electronics are light, flexible, and less expensive to
produce on a mass quantity scale than conventional
electronics
Polymer electronics are not a competing product but are
considered to be more complementary to its silicon
counterpart
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EECE 487 Spring 2009
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“Polymer Electronics.” http://www.polyid.de/en/polymer-electronics.php
Organic/Polymer Electronics http://www.research.philips.com/newscenter/pictures/ldmpolelec.html
“Research Areas.” Nanyang Technical University
http://www.mse.ntu.edu.sg/Research/?op=organicpe.html
“Organic Electronics.” http://en.wikipedia.org/wiki/Organic_electronics
“Polymer Electronics Research Centre.” University of Auckland.
http://www.perc.auckland.ac.nz/uoa/science/about/departments/chemistry/about/research/p
erc/research/actuators.cfm
Bock, Karlheinz. “Polymer Electronics Systems – Polytronics.” IEEE Xplore. Vol. 93, No. 8
August 2005.
Knobloch, Alexander and et al. “Printed Polymer Transistors.” IEEE Xplore website. IEEE
Session 4: Polymer Electronic Devices. 2001.
“PolyIC Newsletter.” IC4U – Issue 01.2009. March 31,2009. Bettina Bergbauer, Public
Relations.
T. Sekitani, Y. Noguchi, U. Zschieschang, H. Klauk, T. Someya.“Organic transistors
manufactured using inkjet technology with sub femtoliter accuracy.” Proceedings of the
National Academy of Sciences, vol. 105, no. 13, pp. 4976-4980, April 2008.
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