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- Title
Thermal stability and electrical studies on hybrid and composite sol-gel quasi-solid-state electrolytes for dye-sensitized solar cells.
- Authors
Apostolopoulou, Andigoni; Nagygyörgy, Viola; Madarász, János; Stathatos, Elias; Pokol, György
- Abstract
Nanocomposite organic/inorganic materials made through sol-gel method can be applied as quasi-solid-state electrolytes aiming to overcome the common issues of evaporation, leaking and stability in dye-sensitized solar cells. Two different kinds of quasi-solid-state electrolytes, depending on the different interactions between silica as inorganic phase and organic substances such as polyethylene/or polypropylene oxide derivatives, are prepared by the sol-gel technique in room temperature. Release dynamics of volatile components from two types of quasi-solid-state electrolytes are studied by thermogravimetry (TG) in order to predict the stability or changes in composites during their application in dye-sensitized solar cells. Two online coupled evolved gas analytical tools (TG-EGA-FTIR and TG/DTA-EGA-MS) are applied to test the gel electrolytes for accelerated thermal vaporization, degradation and decomposition processes as a function of temperature during dynamic heating in air. Stable solar cells based on the different quasi-solid-state electrolytes are constructed and characterized with current density curves exhibiting overall efficiencies varying from 2.9 to 4.2 % for thin TiO films sensitized with standard commercial dye.
- Subjects
THERMAL stability; ELECTROCHEMISTRY; DYE-sensitized solar cells; SOLID state chemistry; ELECTROLYTES
- Publication
Journal of Thermal Analysis & Calorimetry, 2015, Vol 121, Issue 1, p371
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-015-4556-6