Electrochemical synthesis of CdTe nanocrystal/polypyrrole composites for optoelectronic applications

Electrochemical polymerisation has been found to be a convenient method for the synthesis of a thin film composite of a conducting polymer (polypyrrole) and strongly luminescent CdTe semiconductor nanocrystals. Optimal conditions (relatively low anodic potential, neutral pH, aqueous solution) for the synthesis of uniform high-quality films combining the mechanical, electrical and optical properties of the polymer with the luminescence properties of the semiconductor nanocrystals have been established. It has been shown that insertion of the CdTe nanoparticles into the polypyrrole matrix leads to a significant increase in their electroluminescence quantum efficiency.

[1]  B. Zinger,et al.  Flexible polypyrrole/ClO4 films formed in aqueous solutions , 1991 .

[2]  Z. Tian,et al.  Nanomodification of polypyrrole and polyaniline on highly oriented pyrolytic graphite electrodes by atomic force microscopy , 1998 .

[3]  Alexander Eychmüller,et al.  Strongly Photoluminescent CdTe Nanocrystals by Proper Surface Modification , 1998 .

[4]  M. Bawendi,et al.  Electroluminescence from heterostructures of poly(phenylene vinylene) and inorganic CdSe nanocrystals , 1998 .

[5]  I. Uchida,et al.  Microelectrode-based characterization systems for advanced materials in battery and sensor applications , 1999 .

[6]  T. Amemiya,et al.  Charge transport processes in electrochemically deposited poly(pyrrole) and poly( N-methylpyrrole) thin films , 1996 .

[7]  A. Rogach.  Nanocrystalline CdTe and CdTe(S) particles: wet chemical preparation, size-dependent optical properties and perspectives of optoelectronic applications , 2000 .

[8]  Helmuth Möhwald,et al.  Electroluminescence Studies on Self-Assembled Films of PPV and CdSe Nanoparticles , 1998 .

[9]  A. Alivisatos,et al.  Light-emitting diodes made from cadmium selenide nanocrystals and a semiconducting polymer , 1994, Nature.

[10]  Cherie R. Kagan,et al.  Long-range resonance transfer of electronic excitations in close-packed CdSe quantum-dot solids. , 1996, Physical review. B, Condensed matter.

[11]  Q. Pei,et al.  Protonation and deprotonation of polypyrrole chain in aqueous solutions , 1991 .

[12]  B. Scharifker,et al.  The growth of polypyrrole films on electrodes , 1991 .

[13]  Alexander Eychmüller,et al.  Luminescence Properties of Thiol-Stabilized CdTe Nanocrystals , 1999 .