Please use this identifier to cite or link to this item: doi:10.22028/D291-24706
Title: Semiconducting CuClxBr1-x(x=0-1) nanocrystals in thin films : synthesis and characterization
Author(s): Suyal, Ganesh
Mennig, Martin
Schmidt, Helmut K.
Language: English
Year of Publication: 2002
OPUS Source: Journal of materials chemistry. - 12. 2002, 10, S. 3136-3140
SWD key words: Halbleiter
Dünne Schicht
Kupferoxid <Kupfer(II)-oxid>
DDC notations: 620 Engineering and machine engineering
Publikation type: Journal Article
Abstract: Thin films containing semiconducting nanocrystals of CuClxBr1-x( x = 0 1) were synthesized by the sol gel process, by stepwise substitution of chloride ions by bromide ions. Cuprous oxide was used as the precursor for copper, HCl and HBr as halide sources, and the matrix sol was synthesized from 3-glycidoxypropyl-(trimethoxy)silane (GPTS) and tetraethoxysilane (TEOS). The films were characterized using ultraviolet visible (UV-VIS) spectroscopy, high-resolution transmission electron microscopy (HR-TEM) and X-ray diffraction analysis. Thin films (thickness 0.7-1.0 mum) containing cubic CuClxBr1-x (x = 1-0) nanoparticles were obtained. For the samples having no bromide, the absorption spectrum showed a sharp absorption edge at 371 nm. Addition of HBr shifted the peak towards a higher wavelength, giving a peak that is characteristic of CuClxBr1-x; the addition of 1.85 x 10(-2) mole of HBr leads to the complete substitution of chloride by bromide ions. The same observations were also made using X-ray diffraction.
Link to this record: urn:nbn:de:bsz:291-scidok-30302
Date of registration: 12-Nov-2010
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
SciDok - Der Wissenschaftsserver der Universität des Saarlandes

Files for this record:
File Description SizeFormat 
sm200207.pdf315,18 kBAdobe PDFView/Open

Items in SciDok are protected by copyright, with all rights reserved, unless otherwise indicated.