Journal
IONICS
Volume 13, Issue 4, Pages 235-240Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-007-0099-6
Keywords
ZnSe; PEO; chitosan; redox couple; photovoltaic properties
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Thin films of ZnSe and PEO-chitosan blend polymer doped with NH(4)I 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(4)I), and some iodine crystals were added to the polymer-NH(4)I solution to provide the I(-)/I(3-) redox couple. The room temperature ionic conductivity of the polymer electrolyte is 4.32 x 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 mu A.
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