N-type molecular doping of a semicrystalline conjugated polymer through cation exchange

Yu Yamashita; Shinya Kohno; Elena Longhi; Samik Jhulki; Shohei Kumagai; Stephen Barlow; Seth R. Marder; Jun Takeya; Shun Watanabe

doi:10.1038/s43246-024-00507-2

Article N-type molecular doping of a semicrystalline conjugated polymer through cation exchange

Yu Yamashita (National Institute for Materials Science) ; Shinya Kohno ; Elena Longhi ; Samik Jhulki ; Shohei Kumagai ; Stephen Barlow ; Seth R. Marder ; Jun Takeya (National Institute for Materials Science) ; Shun Watanabe

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Yu Yamashita, Shinya Kohno, Elena Longhi, Samik Jhulki, Shohei Kumagai, Stephen Barlow, Seth R. Marder, Jun Takeya, Shun Watanabe. N-type molecular doping of a semicrystalline conjugated polymer through cation exchange. Communications Materials. 2024, 5 (), 79. https://doi.org/10.1038/s43246-024-00507-2

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Control of electrical doping is essential in any semiconductor device, and both efficient hole and electron doping are required for many devices. In organic semiconductors, however, electron doping has been essentially more problematic compared to hole doping because in general organic semiconductors have low electron affinities and require dopants with low ionization potentials that are often air-sensitive. Here, we adapt an efficient molecular doping method, socalled ion-exchange doping, to dope electrons in a polymeric semiconductor. We initially reduce the polymeric semiconductor using one electron transfer from molecular dopants, and then the ionized dopants in the resulting air-unstable films are replaced with secondary ions via cation exchange.

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