| Title |
Properties of the Scattering Layer Inserted Dye Sensitized Solar Cells |
| Authors |
노윤영(Yun Young Noh); 송오성(Oh Sung Song) |
| DOI |
https://doi.org/10.3365/KJMM.2013.51.10.767 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
solar cells; sputtering; optical properties; optical microscopy; scattering layer |
| Abstract |
We propose a working electrode with a scattering layer inserted for dye-sensitized solar cells (DSSCs) with the following structure: glass/FTO/blocking layer/TiO2/scattering layer/dye/electrolyte/Pt/ FTO/glass. A working electrode without a scattering layer was also prepared using a similar method for comparison. The microstructure was examined by optical microscopy and field emission scanning electron microscopy (FE-SEM). The photovoltaic properties, such as the short circuit current density (Jsc), open circuit voltage (Voc), fill factor (FF), energy conversion efficiency (ECE) and impedance were characterized using a solar simulator and potentiostat. FE-SEM confirmed that the blocking layer with 20 nm grains and the scattering layer with 350-450 nm grains had been prepared. The Jsc and Voc increased, and impedance analysis revealed a decrease in the electron transfer resistance and electron recombination resistance at the TiO2/electrolye interface. The ECE with the scattering layer was 6.35%, which was 20% higher than that observed in the ECE without the scattering layer. (Received January 3, 2013) |