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5 October 2015 High-resolution patterning electronic polymers using dopant induced solubility control (Presentation Recording)
Adam J. Moule, Ian E. Jacobs, Jun Li, Stephanie L. Burg, David J. Bilsky, Brandon T. Rotondo, Pieter Stroeve
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Proceedings Volume 9549, Physical Chemistry of Interfaces and Nanomaterials XIV; 954919 (2015) https://doi.org/10.1117/12.2189340
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States
Abstract
Organic electronics promise to provide flexible, large-area circuitry such as photovoltaics, displays, and light emitting diodes that can be fabricated inexpensively from solutions. A major obstacle to this vision is that most conjugated organic materials are miscible, making solution-based fabrication of multilayer or micro- to nanoscale patterned films problematic. Here we demonstrate that the solubility of prototypical conductive polymer poly(3-hexylthiophene) (P3HT) can be reversibly “switched off” using high electron affinity molecular dopants, then later recovered with light or a suitable dedoping solution. Using this technique, we are able to stack mutually soluble materials and laterally pattern polymer films using evaporation of dopants through a shadow mask or with light, achieving sub-micrometer, optically limited feature sizes. After forming these structures, the films can be dedoped without disrupting the patterned features; dedoped films have identical optical characteristics, charge carrier mobilities, and NMR spectra as as-cast P3HT films. This method greatly simplifies solution-based device fabrication, is easily adaptable to current manufacturing workflows, and is potentially generalizable to other classes of materials.
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Adam J. Moule, Ian E. Jacobs, Jun Li, Stephanie L. Burg, David J. Bilsky, Brandon T. Rotondo, and Pieter Stroeve "High-resolution patterning electronic polymers using dopant induced solubility control (Presentation Recording)", Proc. SPIE 9549, Physical Chemistry of Interfaces and Nanomaterials XIV, 954919 (5 October 2015); https://doi.org/10.1117/12.2189340
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KEYWORDS
Polymers
Control systems
Optical lithography
Optics manufacturing
Flexible circuits
Light emitting diodes
Multilayers
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