Photovoltaic activity in a ZnSe/PEO-chitosan blend electrolyte junction
Document Type
Article
Publication Date
1-1-2007
Abstract
Thin films of ZnSe and PEO-chitosan blend polymer doped with NH 4I and iodine crystals were prepared to form the two sides of a semiconductor electrolyte junction. ZnSe was electrodeposited on indium tin oxide (ITO) conducting glass. The polymer is a blend of 50 wt chitosan and 50 wt polyethylene oxide. The polymer blend was complexed with ammonium iodide (NH 4I), and some iodine crystals were added to the polymer-NH 4I solution to provide the I -/I 3-redox couple. The room temperature ionic conductivity of the polymer electrolyte is 4.32���10 -6 S/cm. The polymer film was sandwiched between the ZnSe semiconductor and an ITO glass to form a ZnSe/polymer electrolyte/ITO photovoltaic cell. The open circuit voltage (V oc) of the fabricated cells ranges between 200 to 400 mV and the short circuit current between 7 to 10 μA.
Keywords
Chitosan PEO Photovoltaic properties Redox couple ZnSe Chitin Doping (additives) Photovoltaic cells Polyelectrolytes Polyethylene oxides Polymer blends Zinc compounds Ammonium iodide Indium tin oxide (ITO) conducting glass Short circuit current Thin films
Publication Title
Ionics
Volume
13
Issue
4
Publisher
Springer Verlag (Germany)