期刊
ACS APPLIED ENERGY MATERIALS
卷 5, 期 2, 页码 1933-1941出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.1c03433
关键词
dye-sensitized solar cells; impedance spectroscopy; blocking layer; solar cells; spray pyrolysis; electrochemical double layer; electrode capacitance; recombination
资金
- Royal Society University Research Fellowship [URF\R1\191286]
- Research Grant 2021 [RGS\R1\ 211321]
- Goran Gustafsson Young Researcher Prize
- EPSRC New Investigator Award [EP/V035819/1]
- European KIT InnoEnergy PhD program
This study evaluates the TiO2 blocking layer in dye-sensitized solar cells using transient photovoltage and electrochemical impedance analysis, and demonstrates a feasible method for assessing the performance of TiO2 blocking layers.
The TiO2 blocking layer in dye-sensitized solar cells is the most difficult component to evaluate at thicknesses below 50 nm, but it is crucial for the power conversion efficiency. Here, the electrode capacitance of TiO2 blocking layers is tested in aqueous [Fe(CN)(6)](3-/4-) and correlated to the performance of photoanodes in devices based on a [Cu(tmby)(2)](2+/+) electrolyte. The effects of the blocking layer on electronic recombination in the devices are illustrated with transient photovoltage methods and electrochemical impedance analysis. We have thus demonstrated a feasible and facile method to assess TiO2 blocking layers for the fabrication of dye-sensitized solar cells.
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