Abstract
Gel polymer electrolytes (GPEs) with methyl cellulose (MC) polymer host have been prepared by solution casting. Succinonitrile (SN) is the plasticizer. ZnS and Ag2S are the sulfide salts added. The ZnS:Ag2S weight ratio has been varied. The crystallinity of MC:SN:co-ZnS-Ag2S:S has been investigated using X-ray Diffraction (XRD). The use of two cations from two different salts has decreased crystallinity of the GPEs and the. The MC:SN:(ZnS:Ag2S = 80:20):S GPE exhibited the lowest degree of crystallinity of 21.18 %. Ionic conductivity and dielectric studies have been studied using electrochemical impedance spectroscopy (EIS). MC:SN:(ZnS:Ag2S = 80:20):S electrolyte demonstrated the highest ionic conductivity at room temperature. The value is 6.93 × 10-2S.cm−1. The activation energy is 0.23 eV. The cell FTO/ZnOFe2O4/CdS/MC:SN:(ZnS:Ag2S = 80:20):S/GPE/Pt/FTO has been assembled and characterized. The efficiency obtained is 0.58 % with short current density (Jsc) of 2.15 mA.cm−2, open circuit voltage (Voc) of 0.48 V and fill factor (FF) of 0.56.
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