Buchumschlag

Raman spectroscopy and microscopy of electrochemically and chemically doped high-mobility semiconducting polymers

The polaronic nature of two high-mobility hole-conducting polymers (PBTTT and DPPT-TT) is investigated by Raman spectroscopy and density functional theory (DFT) calculations. Chemical and electrochemical hole doping of these polymers leads to characteristic changes in the intensity ratios of the Ram...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Francis, Chloe (VerfasserIn) , Paulus, Fabian (VerfasserIn) , Beck, Sebastian (VerfasserIn) , Hillebrandt, Sabina (VerfasserIn) , Pucci, Annemarie (VerfasserIn) , Zaumseil, Jana (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: [2017]
In: Journal of materials chemistry. C, Materials for optical and electronic devices
Year: 2017, Jahrgang: 5, Heft: 25, Pages: 6176-6184
ISSN:2050-7534
DOI:10.1039/C7TC01277B
Online-Zugang:Verlag, Volltext: http://dx.doi.org/10.1039/C7TC01277B
Verlag, Volltext: http://pubs.rsc.org/en/content/articlelanding/2017/tc/c7tc01277b
Volltext
Verfasserangaben:C. Francis, D. Fazzi, S. B. Grimm, F. Paulus, S. Beck, S. Hillebrandt, A. Pucci, J. Zaumseil
Beschreibung
Zusammenfassung:The polaronic nature of two high-mobility hole-conducting polymers (PBTTT and DPPT-TT) is investigated by Raman spectroscopy and density functional theory (DFT) calculations. Chemical and electrochemical hole doping of these polymers leads to characteristic changes in the intensity ratios of the Raman active CC stretching modes but no significant frequency shifts. The data indicate a localization of positive polarons on the electron-rich thienothiophene cores that are present in both polymers. DFT calculations show that the Raman intensity ratio variations are most likely caused by the local electric field that originates from negatively charged dopant molecules or electrolyte anions and the positive polaron on the polymer chain. The characteristic changes in the Raman mode intensity ratios with the degree of doping enable in situ mapping of charge carrier concentration in the channel of electrolyte-gated polymer transistors with high spatial resolution.
Beschreibung:Gesehen am 20.04.2018
Beschreibung:Online Resource
ISSN:2050-7534
DOI:10.1039/C7TC01277B

Ähnliche Einträge