Organic & Polymer Electronics Laboratory Lynn Loo Office: CPE 4.422; Labs: & “Water-proof plastic circuitry by lamination,” Featured in Materials Today, October, “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 RF tags, wearable electronics, etc. e.g., the first OLED active matrix display digital camera by Kodak (March, 2003) Kodak LS 633

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 QAS DAK KCF MFK 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 SiO x 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  = 0.06 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 SiO x dielectric PANI electrodes pentacene