For more information, contact Sherri Honza at 254-710-1271

Baylor University and CASPER present:

Dr. Sunghwan Lee Assistant Professor, Department of Mechanical Engineering, Baylor University

CVD Polymers: Processing and Device Applications

Abstract: Emerging technology of oxidative chemical-vapor-deposition (oCVD) polymers offers a facile approach to synthesize and deposit conjugated polymers irrespective of polymer solubility or the properties of the substrate material. The solvent-free oCVD method has the merits of excellent film uniformity over the large areas, high electrical conductivity, conformal coating on non-planar (e.g., textiles and papers) and patterned (e.g., trench) substrates, and low process temperature (RT-100 °C). Therefore, the oCVD films are promising for various electronic/optoelectronic device applications, such as organic thin film transistors, solar cells and sensors. This talk will present the unique processing of functional CVD polymers and the mechanisms for the doping/dedoping and carrier transport that operates in technologically promising conjugated polymers including poly(3,4-ethylenedioxythiophene) (known as PEDOT) and polythiophene. The ability to controllably tune the optical and electrical properties (e.g., visible-regime transmittance, band gap, work function), and polymer morphology will be described as well. I will also discuss the challenging issues for the implementation of these functional CVD polymers into advanced optoelectronic and energy conversion devices such as organic solar cells and thin film transistors, which include instability of materials and devices, and interfacial stability between dissimilar materials. The systematic and mechanistic approaches to solve the limitations will be suggested through various experimental and theoretical analyses. This discussion will provide significant insight into the design of property-controlled functional materials and improvement of device performance.

Friday, April 22, 2016, 3:30 p.m.

Baylor Sciences Building (BSB) Room D.109