Abstract
Nanocrystalline semiconductor films are constituted by a network of mesoscopic oxide particles, such as TiO2, ZnO, Nb2O5 which are interconnected to allow for electronic conduction to take place. The pores between the particles are filled with a semiconducting or a conducting medium, such as a hole transmitter or an electrolyte, forming a junction of extremely large contact area. The salient features of such mesoporous films are:
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i)
an extremely large internal surface area, the roughness factors being in excess of 1000 for a film thickness of 8 microns;
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ii)
the ease of charge carrier percolation across the nanoparticle network making this huge surface electronically addressable;
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iii)
a very rapid and highly efficient interfacial charge transfer between the oxide and redox active species anchored to the particle surface. and
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iv)
the rapid intercalation and release of Li+ ions into such films.
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© 1996 Kluwer Academic Publishers
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Graetzel, M. (1996). Nanocrystalline Electronic Junctions. In: Pelizzetti, E. (eds) Fine Particles Science and Technology. NATO ASI Series, vol 12. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0259-6_49
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DOI: https://doi.org/10.1007/978-94-009-0259-6_49
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-7923-4047-8
Online ISBN: 978-94-009-0259-6
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