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Synthesis of hybrid organic–inorganic nanocomposite materials based on CdS nanocrystals for energy conversion applications

  • Special Issue: Nanostructured Materials 2010
  • Published:
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Abstract

Efficient solar energy conversion is strongly related to the development of new materials with enhanced functional properties. In this context, a wide variety of inorganic, organic, or hybrid nanostructured materials have been investigated. In particular, in hybrid organic–inorganic nanocomposites are combined the convenient properties of organic polymers, such as easy manipulation and mechanical flexibility, and the unique size-dependent properties of nanocrystals (NCs). However, applications of hybrid nanocomposites in photovoltaic devices require a homogeneous and highly dense dispersion of NCs in polymer in order to guarantee not only an efficient charge separation, but also an efficient transport of the carriers to the electrodes without recombination. In previous works, we demonstrated that cadmium thiolate complexes are suitable precursors for the in situ synthesis of nanocrystalline CdS. Here, we show that the soluble [Cd(SBz)2]2·(1-methyl imidazole) complex can be efficiently annealed in a conjugated polymer obtaining a nanocomposite with a regular and compact network of NCs. The proposed synthetic strategies require annealing temperatures well below 200 °C and short time for the thermal treatment, i.e., less than 30 min. We also show that the same complex can be used to synthesize CdS NCs in mesoporous TiO2. The adsorption of cadmium thiolate molecule in TiO2 matrix can be obtained by using chemical bath deposition technique and subsequent thermal annealing. The use of NCs, quantum dots, as sensitizers of TiO2 matrices represents a very promising alternative to common dye-sensitized solar cells and an interesting solution for heterogeneous photocatalysis.

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Acknowledgements

The authors would like to thank L. Capodieci, A. Cappello, S. Mazzarelli, T. Nocco, M. Palmisano and E. Pesce for their valuable technical support. Part of this work is supported by the Regione Puglia (Bari, Italy)—Project PONAMAT PS_016.

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  1. ENEA, UTTMATB, Centro Ricerche Brindisi, Strada Statale “Appia” km. 706, 72100, Brindisi, Italy

    A. M. Laera, V. Resta, M. C. Ferrara, M. Schioppa, E. Piscopiello & L. Tapfer

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  1. A. M. Laera
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  2. V. Resta
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  3. M. C. Ferrara
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  4. M. Schioppa
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  5. E. Piscopiello
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  6. L. Tapfer
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Correspondence to V. Resta.

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Laera, A.M., Resta, V., Ferrara, M.C. et al. Synthesis of hybrid organic–inorganic nanocomposite materials based on CdS nanocrystals for energy conversion applications. J Nanopart Res 13, 5705–5717 (2011). https://doi.org/10.1007/s11051-011-0304-4

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  • DOI: https://doi.org/10.1007/s11051-011-0304-4

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