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16 December 1996 Optical properties of fullerene-based heteromultilayers grown by molecular beam deposition
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Abstract
We report measurements on a multilayer of (alpha) - sexithienyl (T6) and C60 grown in ultra-high vacuum. The photoluminence spectrum of the multilayer is made up to T6 emission at high energies, and C60 emission at low energies. The T6 emission has more structure than that of bulk T6, even after taking into account reabsorption by the C60. However, the spectrum can be simulated quite well by assuming that there is both emission from bulk T6 and isolated molecules of T6, based on the vibronic structure that we would expect from isolated T6 molecules. Molecules of T6 may conceivably become isolated at the C60 interface, if they migrate into gaps between C60 grains, for example. Thus we cannot conclude that any of the new peaks we see are due to charge transfer between the C60 and T6. The low energy fluorescence is that of C60, but its efficiency is orders of magnitude larger than is seen in films of C60. We cannot explain this yet.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Roberto Zamboni, Michele Muccini, O. Kapousta, Mauro Murgia, F. Abbate, Eugenio Lunedei, Carlo Taliani, and Francois Kajzar "Optical properties of fullerene-based heteromultilayers grown by molecular beam deposition", Proc. SPIE 2854, Fullerenes and Photonics III, (16 December 1996); https://doi.org/10.1117/12.262988
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