Abstract
Light harvesting and electron-hole pair separation was studied with picosecond time resolution in supramolecular structures and in semiconductors. Slow singlet exciton diffusion requires an absorption coefficient >105 cm−1 throughout the solar specturm for efficient light harvesting in the supra-molecular antennae system or the assembly of several such less efficient systems in series to facilitate complete light harvesting. The at least 100 times faster minority carrier diffusion in semiconductors imposes a much weaker requirement on the absorption coefficient for complete light harvesting in semiconductors. Optimized electron-hole pair separation along a molecular chain requires a very fast initial hop (ps) and a standard free energy difference smaller than 0.25 eV. Thus the reorganisation energy must be kept small with rigid molecules incorporated into a rigid environment with not too different values for the optical and static dielectric constant. A desirable fuel producing solar energy converter could consist of an efficient photovoltaic semiconductor device protected against corrosion and coupled directly to molecular fuel producing catalyzers.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
M. Van der Auweraer, F. Willig, and K.-P. Charlé, Chem. Phys. Lett, 128, 214 (1986);
K.-P. Charlé and F. Willig, to be published.
S. Efrima and M. Bixon, Chem. Phys. Lett., 25, 34 (1974);
J. Ulstrup and J. Jortner, J. Chem. Phys., 63, 4358 (1975).
J. von Gersdorff, M. Huber, H. Schubert, D. Niethammer, B. Kirste, M. Plato, M. Möbius, H. Kurreck, R. Eichberger, R. Kietzmann, and F. Willig, Angew. Chemie, 102, 690 (1990).
R. A. Marcus, J. Chem. Phys., 43, 679 (1965).
W. S. Durfee, W. Storck, F. Willig, and M. von Frieling, J. Am. Chem. Soc., 109, 1297 (1987).
W. S. Durfee, M. Gruszecka, T. A. Olszak, W. Storck, H. Bradaczek, and F. Willig, J. Am. Chem. Soc, 111, 3699 (1989).
D. Weiß, R. Kietzmann, J. Lehnert, and F. Willig, to be published.
K. Bitterling and F. Willig, unpublished results.
M. Eichhorn, F. Willig, K.-P. Charlé, and K. Bitterling, J. Chem. Phys., 76, 4648 (1982).
R. Eichberger, F. Willig, and W. Storck, Mol. Cryst, Liqu. Cryst., 175, 19 (1989).
N. Vlachopoulos, P. Liska, J. Augustynski, and M. Grätzel, J. Am. Chem. Soc., 110, 1216 (1988);
P. Liska, N. Vlachopoulos, M. K. Nazeeruddin, P. Comte, and M. Grätzel, J. Electroanal. Chem. 259, 59 (1989).
R. Eichberger and F. Willig, Chem. Phys. 141, 159 (1990).
K. Schwarzburg, F. Willig, and P. Liska, to be published.
S. M. Sze, Physics of Semiconductor Devices, 2nd ed., chapter 14, Wiley, New York, 1981.
K. Bitterling and F. Willig, J. Electroanal. Chem. 204, 211 (1986).
F. Willig, Ber. Bunsenges. Phys. Chem. 92, 1312 (1988).
A. Heller, Science, 223, 1141 (1984).
K. Wieghardt, Angew. Chemie, 101,1179 (1989).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1991 Springer Science+Business Media Dordrecht
About this paper
Cite this paper
Willig, F. (1991). Dynamics and Efficiency of Photovoltaic Processes in Supramolecular Structures and Semiconductors. In: Pelizzetti, E., Schiavello, M. (eds) Photochemical Conversion and Storage of Solar Energy. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3396-8_14
Download citation
DOI: https://doi.org/10.1007/978-94-011-3396-8_14
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-5502-4
Online ISBN: 978-94-011-3396-8
eBook Packages: Springer Book Archive