Resonant infrared laser deposition of polymer-nanocomposite materials for optoelectronic applications |
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Authors: | Hee K Park Kenneth E Schriver Jr" target="_blank">Richard F HaglundJr |
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Institution: | (1) Department of Physics and Astronomy and W. M. Keck Foundation Free-Electron Laser Center, Vanderbilt University, Nashville, TN 37235-1807, USA |
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Abstract: | Polymers find a number of potentially useful applications in optoelectronic devices. These include both active layers, such
as light-emitting polymers and hole-transport layers, and passive layers, such as polymer barrier coatings and light-management
films. This paper reports the experimental results for polymer films deposited by resonant infrared matrix-assisted pulsed
laser evaporation (RIR-MAPLE) and resonant infrared pulsed laser deposition (RIR-PLD) for commercial optoelectronic device
applications. In particular, light-management films, such as anti-reflection coatings, require refractive-index engineering
of a material. However, refractive indices of polymers fall within a relatively narrow range, leading to major efforts to
develop both low- and high-refractive-index polymers. Polymer nanocomposites can expand the range of refractive indices by
incorporating low- or high-refractive-index nanoscale materials. RIR-MAPLE is an excellent technique for depositing polymer-nanocomposite
films in multilayer structures, which are essential to light-management coatings. In this paper, we report our efforts to
engineer the refractive index of a barrier polymer by combining RIR-MAPLE of nanomaterials (for example, high refractive-index
TiO2 nanoparticles) and RIR-PLD of host polymer. In addition, we report on the properties of organic and polymer films deposited
by RIR-MAPLE and/or RIR-PLD, such as Alq3 tris(8-hydroxyquinoline) aluminum] and PEDOT:PSS poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate)]. Finally, the
challenges and potential for commercializing RIR-MAPLE/PLD, such as industrial scale-up issues, are discussed. |
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