Solid-state method for incorporation of lead sulfide nanoplates in poly(3,4-ethylenedioxythiophene) matrix as NIR materials

• Published in: Journal of materials science. Materials in electronics 2016-03, Vol.27 (3), p.2640-2644
• Main Authors: Dehghani, Hamid, Afraz, Ahmadreza
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Crystal structure; Diffraction patterns; Grain size; Lead sulfides; Materials Science; Nanocomposites; Nanostructure; Optical and Electronic Materials; X-ray diffraction; X-rays
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-015-4070-4

We investigate the direct incorporation of lead sulfide nanoplates (PbS-NP) in poly(3,4-ethylenedioxythiophene) (PEDOT) matrix without any additives. The PbS-NP was synthesized by using an ultrasonic assistance simple method and composite of them with PEDOT was carried out by a simple solid-state polymerization method. The TEM images, X-ray diffraction patterns and absorption spectra confirm the incorporation of PbS-NP in PEDOT matrix. The XRD pattern showed that the prepared PbS-NPs are crystalline in cubic rock salt structure with 8 nm average grain size. The UV/Vis/NIR spectrum of PEDOT/PbS-NP nanocomposite shows a characteristic peak at NIR region and a large blue shift rather than bulk lead sulfide. This shift confirms synergetic effect between PEDOT matrix and PbS-NPs and presence of quantum confinement effect for prepared PbS-NP. In addition, this characteristic peak is very much dependent on the PbS-NP concentration and can be used for design tunable NIR materials.