研究目的
Investigating the influence of bilateral environment of dyed-TiO2/electrolyte interface on detailed recombination process during the 'mature' period of sensitized solar cell.
研究成果
The performance adjustment of DSC is greatly influenced by the chemical environment of electrolyte. The recombination of electrons through surface states and conduction bands depends heavily on the composition of the electrolyte. The film microstructures have a certain influence on the electronic recombination process during the performance adjustment. The adjustment of quasi-Fermi level is more complicated under the condition of weak light than under the condition of strong light.
研究不足
The study focuses on the performance adjustment period of DSCs and does not extensively cover the stability and degradation periods. The mechanisms for formation of the surface state of the TiO2 film are still unclear.
1：Experimental Design and Method Selection:
The study involves changing the sintering temperature of TiO2 films and the composition of the electrolyte to study their effects on the electron recombination process.
2：Sample Selection and Data Sources:
Commercial TiO2 paste and N719 dye were used, with electrolyte components and additives varied.
3：List of Experimental Equipment and Materials:
Includes screen-printing technique for TiO2 film preparation, muffle furnace for sintering, and Zennium electrochemical workstation for measurements.
4：Experimental Procedures and Operational Workflow:
TiO2 films were prepared at different sintering temperatures, sensitized with N719 dye, and assembled into DSCs with different electrolytes. Photovoltaic performance and electron lifetime were measured over time.
5：Data Analysis Methods:
Electron lifetime was analyzed using open-circuit voltage decay (OCVD) measurements, and photovoltaic performance was tested under simulated sunlight.
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