Translator Disclaimer
16 December 1996 Spectroscopic studies of fullerene thin films and their composites
Author Affiliations +
Photophysical properties of fullerene thin films were investigated by carious spectroscopic measurements including absorption, luminescence, luminescence excitation, electric filed induced luminescence quenching, and electroabsorption. These results were compared with photoconduction spectra, giving a picture of solid fullerene's excited states characterized by substantial charge transfer (CT) nature, that is, excited states delocalized over neighboring molecules in the solid lattice. For C60 films, the CT exciton emerges around 540nm, while for C70 films, it was located at 690 and 535nm. Electroabsorption spectra of the two showed strong modulation at these same energies, and their spectral shapes were well fitted by the second derivative of the corresponding absorption spectra, another evidence for CT excitons. In a different context of work, an attempt was made to develop a new photonic material by the alternate deposition of C60/Si composite layers. We have found that, for appropriate Si content, the composite films emit strong white light under Ar ion laser excitation. The emission spectrum, after correction for the detecting system, was found to be very broad with no specific structures and increased monotonously form visible to 1.5 micrometers , the limit of our measurement apparatus. Moreover, the spectral shape was well fitted by a Planck distribution, giving a surprisingly high black-body temperature of 1400- 1600K. Also discussed are similarities and differences as compared with the previously reported white luminescence from C60 crystallites or powder and their implications.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nobutsugu Minami, Said Kazaoui, Ching-ju Wen, and Hugh James Byrne "Spectroscopic studies of fullerene thin films and their composites", Proc. SPIE 2854, Fullerenes and Photonics III, (16 December 1996);


Tuning exciton delocalization in organic crystalline thin films
Proceedings of SPIE (September 23 2016)
Optical absorption and photoluminescence in crystalline C60
Proceedings of SPIE (December 08 1995)
Optical properties of DNA CTMA and PA CTMA doped with...
Proceedings of SPIE (October 03 2008)
Photoexcited states in fullerene crystals: theory
Proceedings of SPIE (December 16 1996)
Carrier dynamics in solid C60
Proceedings of SPIE (June 17 1993)
Dynamical behavior of photoluminescence of fullerene C60
Proceedings of SPIE (November 28 1994)

Back to Top