Charge transfer at organic/inorganic interfaces and the formation of space charge regions studied with infrared light

• Verfasst von: Beck, Sebastian [VerfasserIn]
• Verfasst von: Gerbert, David [VerfasserIn]
• Verfasst von: Glaser, Tobias [VerfasserIn]
• Verfasst von: Pucci, Annemarie [VerfasserIn]
• Titel: Charge transfer at organic/inorganic interfaces and the formation of space charge regions studied with infrared light
• Verf.angabe: Sebastian Beck, David Gerbert, Tobias Glaser, and Annemarie Pucci
• E-Jahr: 2015
• Jahr: May 18, 2015
• Umfang: 6 S.
• Fussnoten: Gesehen am 03.08.2020
• Titel Quelle: Enthalten in: The journal of physical chemistry <Washington, DC> / C
• Ort Quelle: Washington, DC : Soc., 2007
• Jahr Quelle: 2015
• Band/Heft Quelle: 119(2015), 22, Seite 12545-12550
• ISSN Quelle: 1932-7455
• DOI: doi:10.1021/acs.jpcc.5b04398
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1726066673

Abstract

We present in situ infrared spectroscopy as a powerful tool for the qualitative and quantitative analysis of the charge transfer through the prototypical interface between the organic semiconductor 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP) and MoO3 that in organic electronic devices is often used to improve their performance. Due to the different infrared vibrational spectra, charged and neutral species of CBP molecules can be well distinguished, which allows the measurement of the amount of charged species in the vicinity of the interface. The quantitative analysis of CBP thickness-dependent infrared transmission spectra delivered the extension of the space charge region from the interface into the CBP on a nanometer scale. The clear influence of the deposition sequence on these interface properties was clarified by further studies of the inverted layer structures.