In situ growth of well-dispersed CdS nanocrystals in semiconducting polymers

Anna Maria Laera, Vincenzo Resta, Emanuela Piscopiello, Valerio Miceli, Monica Schioppa, Anna Grazia Scalone, Francesca Di Benedetto, Leander Tapfer

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Abstract

A straight synthetic route to fabricate hybrid nanocomposite films of well-dispersed CdS nanocrystals (NCs) in poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) is reported. A soluble cadmium complex [Cd(SBz)2]2·MI, obtained by incorporating a Lewis base (1-methylimidazole, MI) on the cadmium bis(benzyl)thiol, is used as starting reagent in an in situ thermolytic process. CdS NCs with spherical shape nucleate and grow well below 200°C in a relatively short time (30 min). Photoluminescence spectroscopy measurements performed on CdS/MEH-PPV nanocomposites show that CdS photoluminescence peaks are totally quenched inside MEH-PPV, if compared to CdS/PMMA nanocomposites, as expected due to overlapping of the polymer absorption and CdS emission spectra. The CdS NCs are well-dispersed in size and homogeneously distributed within MEH-PPV matrix as proved by transmission electron microscopy. Nanocomposites with different precursor/polymer weight ratios were prepared in the range from 1:4 to 4:1. Highly dense materials, without NCs clustering, were obtained for a weight/weight ratio of 2:3 between precursor and polymer, making these nanocomposites particularly suitable for optoelectronic and solar energy conversion applications. © 2013 Laera et al.; licensee Springer.
Original languageEnglish
Pages (from-to)1 - 8
Number of pages8
JournalNanoscale Research Letters
Volume8
Issue number1
DOIs
Publication statusPublished - 2013
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Laera, A. M., Resta, V., Piscopiello, E., Miceli, V., Schioppa, M., Scalone, A. G., ... Tapfer, L. (2013). In situ growth of well-dispersed CdS nanocrystals in semiconducting polymers. Nanoscale Research Letters, 8(1), 1 - 8. https://doi.org/10.1186/1556-276X-8-382