Berlin 2012 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 44: Poster IV: Thin film photovoltaics; Organic electronics and photovoltaics (jointly with CPP, HL, O); Organic thin films; Trends in atomic layer deposition (Focused session)

DS 44.51: Poster

Freitag, 30. März 2012, 09:30–12:00, Poster E

Raman Spectroscopy on Potassium Doped Manganese Phthalocyanine Thin Films — •Michael Ludemann¹, Benjamin Mahns², Ovidiu D. Gordan¹, Martin Knupfer², and Dietrich R.T. Zahn¹ — ¹TU Chemnitz, 09126 Chemnitz, Germany — ²IFW Dresden, 01069 Dresden, Germany

Alkali metals are well known as electron donors due to their strongly electropositive character. On the other hand, phthalocyanines are a known class of very stable organic molecules. Here, the influence of potassium intercalation on manganese phthalocyanine (MnPc), an archetype magnetic molecule, is investigated by in situ Raman spectroscopy. MnPc thin films (≤ 10 nm) are prepared by organic molecular beam deposition (OMBD) in ultra-high vacuum (UHV) conditions and potassium is evaporated afterwards. Charge transfer from the potassium atoms to MnPc leading to negatively charged MnPc molecules is clearly observed by pronounced spectral changes in the Raman spectra. In combination with theoretical results the amount of charge per molecule was analysed.