Article ID Journal Published Year Pages File Type
1674491 Thin Solid Films 2008 5 Pages PDF
Abstract

The performance of dye-sensitized solar cells, based on pure and binary ionic liquid electrolyte with different iodine concentrations, have been evaluated under 1 sun illumination and different cells temperature between 5 and 55 °C. At lower temperatures a short-circuit current (JSC) may be limited by the diffusion of tri-iodide. In this situation JSC increases with increasing temperature, while at higher temperatures the JSC decreases due to more pronounced recombinations. We find a maximum for JSC at intermediate temperatures. This maximum shifts to lower temperatures by increasing iodine concentration. At a certain temperature different iodine concentration is optimal for different ionic liquids employed in the electrolyte. The open circuit voltage monotonically decreases with temperature while the conversion efficiency is basically dominated by temperature dependence of JSC.

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Physical Sciences and Engineering Materials Science Nanotechnology
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