A comparative study of charge transport in quasi-solid state dye-sensitized solar cells using polymer or nanocomposite gel electrolytes

作者：Lee Hsin Fang^*; Kai Ji Jung; Liu Pang Chun; Chang Wei Chen; Ouyang Fan Yi; Chan Hsiu Ting

来源：Journal of Electroanalytical Chemistry, 2012, 687: 45-50.

DOI：10.1016/j.jelechem.2012.09.034

• Dye-sensitized solar cells
• Quasi-solid electrolytes
• Cyclic voltammetry
• Electrochemical impedance spectroscopy
• Transmission line model

To improve the photovoltaic and durability performance of quasi-solid dye-sensitized solar cells (DSCs), we added selected gelators to the liquid electrolyte. Metal-oxide nanoparticles or fluorine polymers were employed to solidify 3-methoxypropionitrile-based liquid electrolytes containing an ionic liquid, 1,2-dimethyl-3-propyl imidazolium iodide, as a source of iodide. The electrochemical impedance spectroscopy and cyclic voltammetry were employed to study the kinetics of electrochemical and photoelectro-chemical processes, including the elucidation of the electronic and ionic processes occurring in the various quasi-solid-state solar cells. Among tested gelators, a cell with TiO2 solidified electrolyte (P25, 17.5 wt%) exhibited the best photovoltaic performance with power conversion efficiency 7.65% under simulated sunlight (100 mWcm(-2)). The DSCs with a TiO2 solidified electrolyte showed endurance of stability superior to that of a pure liquid electrolyte.

• 出版日期2012-11-1
• 单位清华大学