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Solid Polymer Electrolyte (SPEs) composed of cellulose acetate (CA) doped with different stoichiometric ratio of ammonium iodide (NH 4 I) was study. Alternating current impedance spectroscopy was carried out in the frequency range between 50 Hz and 1 MHz at room and elevated temperatures. The highest ionic conductivity obtained from the complex impedance spectra of the order of 10 −4 S cm −1 at room temperature with the polymer-salt composition of CA (75 wt%):NH 4 I (25 wt%). Temperature dependence of the conductivity for all samples studied was of the Arrhenius type. Modulus formalism analysis verified the samples are ionic conductor and was confirmed by electronic transference number. X-ray diffraction spectral analysis showed the introduction of doping salt was decreased the degree of crystallinity of polymer host.

Abstract. The absorption rate of the photoanode can be influenced by the combination between the difference semiconductor quantum dot sensitizer. Six samples were prepared with difference weight percent (wt%) of ZnS from 0% to 50% and constant wt% of CdSe which then will be called as semiconductor QDs were immersed in 0.5mM of N719 dye. The purity of ZnS powder and CdSe powder was determined using x-ray diffraction (XRD).The ultraviolet-visible spectrophotometry (Uv-Vis) use to investigate the absorption spectrum and absorbance peak of this sample. 50 wt% of ZnS is the best composition to increase the absorbance peak of the photoanode. The Cyclic voltammetry (CV) of varying wt% of ZnS, found that the 40 wt% of ZnS is suitable combination for a DSSC's photoanode and produced the higher current.

Gel polymer electrolyte films based on cellulose acetate (CA) complexed with ammonium iodide (NH4I), and ethylene carbonate (EC) was prepared by the solution cast technique. The conductivity increases to 10-4 Scm-1 upon the addition of salt. The incorporation of EC and to the salted polymer enhances the conductivity significantly 10-3 Scm-1. The complexation of doping materials with polymer was confirmed by X-ray diffraction and infrared studies. The present of ethylene carbonate (EC) as plasticizer did not disturbed the complexation between polymer and salt that has been confirm by FTIR. XRD studies further confirmed that all sample prepared are crystalline. This result affirmed that there were no complexations occur between plasticizer in the CA-NH4I polymer system.