Journal
JOURNAL OF POLYMER RESEARCH
Volume 29, Issue 11, Pages -Publisher
SPRINGER
DOI: 10.1007/s10965-022-03305-x
Keywords
GPEs; Conductivity; Potassium iodide; Tetramethyl ammonium iodide; DSSCs
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Funding
- Universiti Teknikal Malaysia Melaka short-term research grant [PJP/2020/FKP/PP/S01758]
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This study investigates the impact of small cations on the conductivity and efficiency of dye-sensitized solar cells (DSSCs). The addition of a small cation, potassium iodide (KI), to the gel polymer electrolyte significantly improves the conductivity, resulting in enhanced performance of DSSCs.
This study investigates the impact of small cations on improving conductivity and efficiency of dye-sensitized solar cells (DSSCs). The work includes preparation and characterization of polyvinyl alcohol-based gel polymer electrolytes (GPEs) containing tetramethyl ammonium iodide (TMAI) and potassium iodide (KI) salts. The degree of crystallinity of the GPEs has been determined from x-ray diffraction (XRD). From electrical impedance spectroscopy (EIS), the gel polymer electrolyte with only TMAI salt exhibits a conductivity of 1.72 mS cm(-1). On addition of KI salt, conductivity increased up to a maximum of 7.87 mS cm(-1) for the GPE comprising 70 wt. % KI. The dye-sensitized solar cells (DSSCs) with GPE comprising 100 wt. % TMAI - 0 wt. % KI exhibits a short-current density, J(sc) of 6.60 mA cm(-2) and open-circuit voltage, V-oc of 0.56 V. The fill factor, ff, and efficiency, eta, obtained are 79% and 2.92%, respectively. The existence of a small cation K+ in the GPE enhances DSSCs performance with GPE consisting of a 3:7 weight ratio between TMAI and KI exhibits J(sc) of 11.30 mA cm(-2) and V-oc of 0.60 V. The acquired fill factor, ff, and efficiency, eta, are 74% and 5.02%, respectively.
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