Approaches to Solution Deposited Flexible Composite Vapor Barrier Films
- PDF / 936,713 Bytes
- 6 Pages / 612 x 792 pts (letter) Page_size
- 24 Downloads / 188 Views
1195-B08-26
Approaches to Solution Deposited Flexible Composite Vapor Barrier Films Jeffrey A. Gerbec1,2, Jimmy Granstrom2,4, Hunaid Nulwala2,3,5, Luis M. Campos2,3, Craig J. Hawker2,3 1 MC Research and Innovation Center, Inc., 601 Pine Ave, Suite C, Goleta, CA 93117, U.S.A. 2 Mitsubishi Chemical Center for Advanced Materials, University of California, Santa Barbara, CA 93106, U.S.A. 3 Materials Research Laboratory, University of California, Santa Barbara, CA 93106, U.S.A. 4 Center for Polymers and Organic Solids, University of California, Santa Barbara, CA 93106, U.S.A. 5 U.S. Department of Energy, National Energy Technology Laboratory, P.O. Box 10940, Pittsburgh, PA 15236 ABSTRACT Liquid resin hybridized silica sol-gels and thiol-ene elastomers were evaluated as compatible materials to form thin film, flexible multilayered structures. Liquid resins are cast and cured in air and ambient pressure on the order of minutes. Scanning Electron Microscopy (SEM) reveals homogeneous interfaces and robust interfacial adhesion under tensile and compressive stress. Thickness of the hybrid glass and thiol-ene films range from 0.80µm to 1.5µm and 8 µm to 16 µm respectively.
INTRODUCTION The form factor of next generation organic electronic devices are offering new challenges in packaging and barrier film technology, namely organic light emitting diode (OLED), organic photovoltaics (OPV) and biomedical devices. Air and water sensitivity of organic electronic devices has delayed the broad commercialization of the “printed plastic” electronics technology. Although barrier films utilizing multilayer structures have been developed which meet the industry requirement for lifetimes exceeding 10,000h for OLEDs and OPVs [1], the vacuum deposition methods used to fabricate the multilayer structures are complex and costly. Recent work has been devoted to formulating hybrid organic inorganic materials that display ceramic-like properties. These materials are commonly known as ORMOCERS [2,3], CERAMERS [4], and Hybrid Glass [5]. These materials impart the physical properties of ceramic glass, i.e. high temperature durability, robust mechanical properties, excellent barrier performance and chemical resistance. As a benefit to processing, they are typically handled as room temperature liquids or viscous slurries in air prior to cross-linking and densification. Extension of these hybrid materials to typical multilayer barrier films are advantageous for the following reasons: 1) handling at room temperature and pressure, 2) resins viscosity allows printing or spray deposition, 3) significantly inexpensive raw materials compared to vacuum deposited precursors. Typical multilayered films are produced by chemical vapor deposition (CVD) of amorphous metal oxides on flexible plastic substrates [6]. Process variances and substrate inhomogeneity lead to oxide layer defects ranging from nanometer to the micron scale. The defects, depending on their proximity per unit area to one another, can
negatively influence the mass transfer, of ambient gas inwa
Data Loading...
