A polymer electrolyte containing ionic liquid for possible applications in photoelectrochemical solar cells
Journal article, 2010

Various iodide ion conducting polymer electrolytes have been studied as candidate materials for fabricating photoelectrochemical (PEC) solar cells and energy storage devices. In this study, enhanced ionic conductivity values were obtained for the ionic liquid tetrahexylammonium iodide containing polyethylene oxide (PEO)-based plasticized electrolytes. The analysis of thermal properties revealed the existence of two phases in the electrolyte, and the conductivity measurements showed a marked conductivity enhancement during the melting of the plasticizer-rich phase of the electrolyte. Annealed electrolyte samples showed better conductivity than nonannealed samples, revealing the existence of hysteresis. The optimum conductivity was shown for the electrolytes with PEO:salt= 100:15 mass ratio, and this sample exhibited the minimum glass transition temperature of 72.2 °C. For this optimum PEO to salt ratio, the conductivity of nonannealed electrolyte was 4.4×10−4 S cm−1 and that of the annealed sample was 4.6×10−4 S cm−1 at 30 °C. An all solid PEC solar cell was fabricated using this annealed electrolyte. The short circuit current density (ISC), the open circuit voltage (VOC), and the power conversion efficiency of the cell are 0.63 mA cm−2, 0.76 V, and 0.47% under the irradiation of 600 W m−2 light.

Ionic liquid

Ionic conductivity

Polymer electrolyte

PEC solar cells


T M W J Bandara

Chalmers, Applied Physics, Solid State Physics

P Ekanayake

University of Peradeniya

M.A.K.L. Dissanayake

University of Peradeniya

Ingvar Albinsson

University of Gothenburg

Bengt-Erik Mellander

Chalmers, Applied Physics, Solid State Physics

Journal of Solid State Electrochemistry

1432-8488 (ISSN) 14330768 (eISSN)

Vol. 14 7 1221-1226

Subject Categories

Physical Chemistry

Condensed Matter Physics



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