Journal
ADVANCED MATERIALS
Volume 29, Issue 42, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201703063
Keywords
molecular doping; morphology; organic electronics; organic semiconductor; polymer patterning
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Funding
- U.S. National Science Foundation Scalable Nanomanufacturing [1636385]
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-SC0010419]
- Directorate For Engineering [1636385] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn [1636385] Funding Source: National Science Foundation
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The field of organic electronics thrives on the hope of enabling low-cost, solution-processed electronic devices with mechanical, optoelectronic, and chemical properties not available from inorganic semiconductors. A key to the success of these aspirations is the ability to controllably dope organic semiconductors with high spatial resolution. Here, recent progress in molecular doping of organic semiconductors is summarized, with an emphasis on solution-processed p-type doped polymeric semiconductors. Highlighted topics include how solution-processing techniques can control the distribution, diffusion, and density of dopants within the organic semiconductor, and, in turn, affect the electronic properties of the material. Research in these areas has recently intensified, thanks to advances in chemical synthesis, improved understanding of charged states in organic materials, and a focus on relating fabrication techniques to morphology. Significant disorder in these systems, along with complex interactions between doping and film morphology, is often responsible for charge trapping and low doping efficiency. However, the strong coupling between doping, solubility, and morphology can be harnessed to control crystallinity, create doping gradients, and pattern polymers. These breakthroughs suggest a role for molecular doping not only in device function but also in fabrication-applications beyond those directly analogous to inorganic doping.
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