Effect of increased surface area of stainless steel substrates on the efficiency of dye-sensitized solar cells

Yun, Ho-Gyeong; Jun, Yongseok; Kim, Jongdae; Bae, Byeong-Soo; Kang, Man Gu
September 2008
Applied Physics Letters;9/29/2008, Vol. 93 Issue 13, p133311
Academic Journal
In order to increase the electrical contact area between TiO2 particles and stainless steel (StSt) substrates of the dye-sensitized solar cells (DSSCs), StSt foil was roughened electrochemically using sulfuric acid with some additives. Compared with the DSSC with nontreated StSt substrate, DSSC with this roughened StSt substrate showed a 33% increase in light-to-electricity conversion efficiency with negligible effect on open circuit voltage (Voc) and fill factor. Electrochemical impedance spectroscopy clearly confirmed that the increased performance was due to a decreased electrical resistance at the TiO2/StSt interface.


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