Nanoassemblies for photovoltaic applications

Yaocihuatl Medina-Gonzalez; William Z. Xu; Bo Chen; Nasrin Farhangi; Paul A. Charpentier

doi:10.1117/12.873084

22 September 2010 Nanoassemblies for photovoltaic applications

Yaocihuatl Medina-Gonzalez, William Z. Xu, Bo Chen, Nasrin Farhangi, Paul A. Charpentier

Proceedings Volume 7750, Photonics North 2010; 77502Z (2010) https://doi.org/10.1117/12.873084
Event: Photonics North 2010, 2010, Niagara Falls, Canada

Abstract

An easy process was developed to fabricate TiO₂ nanowires sensitized with CdS and CdTeS quantum dots (QDs). CdS and CdTeS nanoparticles were grown in situ by a colloidal method. No pretreatment of the TiO₂ nanowires was required prior to nanoparticle generation. Functionalization of CdS and CdTeS QDs was not needed to anchor these nanoparticles to TiO₂ surface. The resulting nanostructure assembly and composition was confirmed by transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The electronic structure of TiO₂ nanowires was preserved as indicated by Raman spectroscopy. The sensitization of the TiO₂ nanowires by the QDs was confirmed by photocurrent measurements. This study allows the generation of strongly anchored CdS and CdTeS QDs on TiO₂ nanowires surface without the introduction of a linker molecule which presence decreases the electron injection efficiency.

Citation Download Citation

Yaocihuatl Medina-Gonzalez, William Z. Xu, Bo Chen, Nasrin Farhangi, and Paul A. Charpentier "Nanoassemblies for photovoltaic applications", Proc. SPIE 7750, Photonics North 2010, 77502Z (22 September 2010); https://doi.org/10.1117/12.873084

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