Properties of Working Electrodes with Diamond Blends in Dye Sensitized Solar Cells

다국어 초록 (Multilingual Abstract)

We prepared blocking layers by adding 0.0 ~ 0.6 wt% nano diamond blends (DBs) to TiO2 blocking layers to improve the energy conversion efficiencies (ECEs) of dye sensitized solar cells (DSSCs). TEM and micro-Raman spectroscopy were used to characterize the microstructure and phases of DBs, respectively. Optical microscopy and FE-SEM were used to analyze the microstructure of the TiO2 blocking layer with DBs. UV-VIS-NIR spectroscopy was used to determine the absorbance of the working electrodes.
A solar simulator and a potentiostat were used to determine the photovoltaic properties and the impedance of the DSSCs with DBs. From the results of the DBs analysis, we determined a 6.97 nm combination of nano diamonds and graphite. We confirmed that ECE increased from 5.64 to 6.48 % when the added DBs increased from 0.0 to 0.2 wt%. This indicates that the effective surface area and electron mobility increased when DBs were added to the TiO2 blocking layer. Our results indicate that the ECE of DSSCs can be enhanced by adding an appropriate amount of DBs to the TiO2 blocking layers.

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