Abstract
We have studied relaxation dynamics of photoexcitation and initial processes of the photopolymerization in C60 molecules and solids by means of time- resolved spectroscopies. The femtosecond pump and probe spectroscopy shows that the photoexcitations in C60 solution are relaxed into the triplet state in 900 ps, while for C60 solid the fast relaxation occurs in 1 ps. The fast relaxation of charge- transfer (CT) excitons being characteristic of the C60 solid is interpreted in terms of the self-trapping of CT excitons in the simple cubic lattice. In the luminescence spectrum of the pristine crystal, we observe luminescence due to the S1-S0 transition which is partially allowed by the Hertzberg-Teller mechanism and luminescence originating from the self-trapped CT excitons. From the comparison of the similar spectral features observed for the pristine and photopolymerized crystals we discuss configurations of the photoinduced dimer and self-trapped CT exciton, and propose that the self-trapped CT exciton is a precursor to the photopolymerization.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
H. W. Kroto, J. R. Heath, S. C. O’Brien, R. F. Curl and R. E. Smalley, Nature 318, 162(1985).
S. Saitoh and A. Oshiyama, Phys. Rev. Lett. 66, 2637 (1991).
Q.-M. Zhang, J.-Y. Yi, J. Bernholc, Phys. Rev. Lett. 66, 2633 (1991).
C. Reber, L. Yee, J. Mckiernan, J. I. Zink, R. S. Williams, W. M. Tang, D. A. A. Ohlberg, R. L. Whetten and F. Diederich, J. Phys. Chem., p5, 2127 (1991).
A. F. Hebard, R. C. Haddon, R. M. Fleming and A. R. Kotan, Appl. Phys. Lett. 59,2109(1991).
A. Nakamura, M. Ichida, T. Yajima, H. Shinohara and Y. Saitoh, J. Lumin. 66&67, 383 (1996).
A. M. Rao, P. Z. Zhou, Kai-An Wang, G. T. Hager, J. M. Holden, Ying Wang, W-T. Lee, Xiang-Xie Bi, P. C. Eklund, D. S. Cornett, M. A. Duncan and I. J. Amster, Science 259, 955 (1993).
P. Z. Zhou, Z-H. Dong, A. M. Rao and P. C. Eklund, Chem. Phys. Lett. 211, 337 (1993).
W. Kratschmer, L. D. Lamb, K. Forstiropoulos and D. R. Huffinan, Nature 347, 354 (1990).
S. Leach, M. Vervloet, A. Despre, E. Breheret, J. P. Hare, T. J. Dennis, H. W. Kroto, R. Taylor and D. R. M. Walton, Chem. Phys. 160, 451 (1992).
T. Tsubo and K. Nasu, J. Phys. Soc. Jpn. 63, 2401 (1994).
R. V. Besasson, T. Hill, C. Lambert, E. J. Land, S. Leach and T. G. Truscott, Chem. Phys. Lett. 201, 326 (1993).
R. j. Sension, C. M. Philiips, A. Z. Szarka, W. J. Ramanow, A. R. McGhie, J. P. McCauley, Jr., A. B. Smith III and R. M. Hochstrasser, J. Phys. Chem. 95, 6075 (1991).
A. Nakamura, T. Tokizaki, S. Iwai, Y. L. Lee, Y. Saitoh and H. Shinohara, Proc. Int. Conf. on the Physics of Semiconductors, Beijin, 1992, (World Scientific, 1992) p. 1828.
S. Huant, J. B. Robert, G. Chouteau, P. Bernier, C. Fabre and A. Rassat, Phys. Rev. Lett. 69, 2666 (1992). and S. A. FitzGerald and A. J. Sievers, Phys. Rev. Lett. 70,3175 (1993).
M. Matus, H. Kuzmany, E. Sohmen, Phys. Rev. Lett. 68, 2822 (1992).
W. Z. Wang, C. L. Wang, Z. B. Su andL. Yu, Phys. Rev. Lett. 3550 (1994).
M. Ichida, M. Sakai, T. Yajima and A. Nakamura, Progress in Crystal Growth & Characterization on Materials, in press.
A. Nakamura, M. Ichida and T. Yajima, Progress in Crystal Growth & Characterization on Materials, in press.
P. A. Heiney, J. E. Fischer, A. R. McGhie, W. J. Romanow, A. M. Denenstein, J. P. McCanley,Jr., and A. B. Smith, III, Phys. Rev. Lett. 66, 2911 (1991).
S. Iwai, T. Tokizaki, A. Nakamura, T. Shibata, K. Tanimura, N. Itoh and A. Shluger, Phy. Rev. Lett. 76, 1691 (1996).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1997 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Nakamura, A., Ichida, M., Sakai, M., Yajima, T. (1997). Ultrafast Relaxation of Excitons and Photopolymerization Process in Fullerenes. In: Nasu, K. (eds) Relaxations of Excited States and Photo-Induced Structural Phase Transitions. Springer Series in Solid-State Sciences, vol 124. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-60702-8_28
Download citation
DOI: https://doi.org/10.1007/978-3-642-60702-8_28
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-64516-7
Online ISBN: 978-3-642-60702-8
eBook Packages: Springer Book Archive