organic & polymer electronics laboratory lynn loo office: cpe 4.422; labs: 3.436 & 3.438...
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Organic & Polymer Electronics Laboratory
Lynn LooOffice: CPE 4.422; Labs: 3.436 & 3.438
471-6300http://www.engr.utexas.edu/che/directories/faculty/loo.cfm
“Water-proof plastic circuitry by lamination,” Featured in Materials Today, October, 2002.
“Towards large-area flexible displays: solventless thermal laser ablation printing of conductive polymers,”Featured in Nature Materials, January, 2003.
Introduction: The World’s First Electronic Paper
Rogers et al., Proc. Nat. Acad. Sci. USA 2001.
Backplane: Organic Transistors on Plastic Substrate
Rogers et al., Proc. Nat. Acad. Sci. USA 2001.
Why Organic Materials and Plastic Substrates?
• Improved mechanical flexibility and bendability
• Large-area coverage
• Compatible with high-speed reel-to-reel fabrication
• Low production costs
Potential applications in large-area flexible displays, disposable RFtags, wearable electronics, etc.
e.g., the first OLED active matrix display digital camera by Kodak (March, 2003)
Kodak LS 633http://www.kodak.com
Group Focus
• Design and synthesis of new materials for electronic applications (Bucholz, Guloy, Smith)
• Understanding structure-property interrelationships and how they can impact device performance (Krapchetov, Lee, Khan)
• Developing unconventional, non-invasive materials processing, patterning, and printing technologies specifically for organic device fabrication (Felmet, Lee, Mitchell)
Group photo, December 2003.
Design & Synthesis of
Functional Polymers
Structure & Property Relationships
Device Fabrication & Testing
Downstream
ASG
TLB
QASDAK
KCFMFK
KSL
SMM
Organic and Polymer Electronics Laboratory
1 polymer chemistry/physics project available;can be co-advised with Prof. Ganesan
1 patterning project available
Kwang Seok Lee: Patterning Water-Soluble, Conductive Polyaniline
1. Surface treat SiOx
3. Hydrophobic/hydrophilic pattern from microcontact printing
4. Dip-coat polyaniline
PDMS stamp coated with octadecyltrichlorosilane 200 m
2. Stamp hydrophobic molecules on surface
Partially supported by DuPont Young Professor Grant
Preliminary Electrical Characterization
0
2
4
6
8
10
0 0.1 0.2 0.3 0.4 0.5 0.6
RA
(o
hm
-cm
2)
Length (cm)
= 0.06 S/cm
Conductivity measurements: Organic transistors that use PANI electrodes:
Results will be presented at the Spring ACS Meeting, Anaheim, CA; 03/2004.
Collaborators: Graciela Blanchet and Feng Gao, DuPont Central Research, Wilmington, DE
Si gate
SiOx dielectric
PANI electrodes
pentacene
-1 10-6
-8 10-7
-6 10-7
-4 10-7
-2 10-7
0
-50 -40 -30 -20 -10 0
Vg = 0-10V-20V-30V-40V-50V
I sd (
Am
ps)
Vsd
(Volts)