Proceedings of September Meeting 2016 (NFM16)
Publication date: 14th June 2016
Nanochemistry developed a manifold of ways to synthesize homo- and heterogeneous semiconductor nanocrystals. These particles show a broad diversity in shape, size and attributes.1,2 The photoelectrochemical properties of these semiconducting materials are only understood in a few cases. In the present work monolayers of fluorescent quantum confined CdSe/CdS based nanoparticles are coated onto fluorine doped tin oxide (FTO) glasses.3 A setup based on light emitting diodes (LED) makes it possible to study the photocurrent dependent on wavelength and excitation frequency. This system is an ideal basis to study the intrinsic attributes of the nanocrystals. Intensity modulated photocurrent spectroscopy (IMPS) experiments are a practical way to investigate the charge carrier dynamics of the heterostructures.4 Special attentions are paid to the differences of a whole excited CdSe/CdS system and a particle in which only the CdSe part is excited.
1. Carbone, L. et al.; Nano Lett. 7, 2942–2950 (2007)
2. Ithurria, S. et al.; JACS 130, 16504-16505 (2008)
3. Hickey, S.G. et al.; J. Phys. Chem. B 104, 7623–7626 (2000)
4. Bakkers, E.P.A.M. et al.; J. Phys. Chem. B 103, 2781-2788 (1999)
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