Electrochemically synthesised CdSe nanofibers and pearl-chain nanostructures for photovoltaic applications

摘要

Self-assembled arrays of CdSe nanofibers with diameter of 40 nm and length about 2 urn were electrodeposited onto glass/ITO substrates in aqueous media. Thermal treatments of CdSe nanofibers were applied and the influence of treatment on morphology, optical and electrical parameters were investigated. Scanning electron microscopy (SEM) study of CdSe structures revealed the change in the morphology of CdSe structures from nanofibers to pearl chain-like nanostructures after thermal treatment at 350 ℃ in air. Also CdSe nanostructures were characterized by UV-vis absorption spectroscopy and X-ray diffraction spectroscopy (XRD). The poly(3-octylthiophene) (P3OT) functional layers were deposited on CdSe nanowires by spin-casting technique to prepare hybrid photovoltaic (PV) structures. Obtained CdSe nanowires/P3OT PV structures were characterized and partially optimized by additional post-deposition thermal treatment.