Journal
NATURE REVIEWS MATERIALS
Volume 4, Issue 10, Pages 627-650Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41578-019-0127-y
Keywords
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Funding
- Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO Mat LiU) [2009 00971]
- Wallenberg Wood Science Center
- Knut and Alice Wallenberg Foundation
- Swedish Foundation for Strategic Research, Vinnova (Digital Cellulose Center)
- Swedish Foundation for Strategic Research, Vinnova (Treesearch)
- Swedish Research Council
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Undoped, conjugated, organic molecules and polymers possess properties of semiconductors, including the electronic structure and charge transport, which can be readily tuned by chemical design. Moreover, organic semiconductors (OSs) can be n-doped or p-doped to become organic conductors and can exhibit mixed electronic and ionic conductivity. Compared with inorganic semiconductors and metals, organic (semi)conductors possess a unique feature: no insulating oxide forms on their surface when exposed to air. Thus, OSs form clean interfaces with many materials, including metals and other OSs. OS-metal and OS-OS interfaces have been intensely investigated over the past 30 years, from which a consistent theoretical description has emerged. Since the 2000s, increased attention has been paid to interfaces in organic electronics that involve dielectrics, electrolytes, ferroelectrics and even biological organisms. In this Review, we consider the central role of these interfaces in the function of organic electronic devices and discuss how the physico-chemical properties of the interfaces govern the interfacial transport of light, excitons, electrons and ions, as well as the transduction of electrons into the molecular language of cells.
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