کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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728167 | 1461405 | 2016 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of sol–gel MgO spin-coating on the performance of TiO2-based dye-sensitized solar cells Effect of sol–gel MgO spin-coating on the performance of TiO2-based dye-sensitized solar cells](/preview/png/728167.png)
This paper is concerned with the improvement of dye-sensitized solar cell (DSSC) efficiency upon MgO post-treatment of the TiO2 electrode. A simple sol–gel technique, involving magnesium acetate as precursor, ethanol as solvent and nitric acid as stabilizer, is applied to prepare a solution of suspended MgO nanoparticles. A single drop of MgO sol at 0.1 M precursor concentration was spin-coated at 3000 rpm for 30 s onto the TiO2 electrode and sintered at 500 K for 1 h. Dye-loading using N3-dye was applied for 6 h. An increase in the average efficiency of the DSSC from 2.5% to 3.9% (over 50% enhancement) was recorded. Measurements of the dark I–V characteristics, the open circuit voltage decays, the SEM images and the dye absorbance spectra, for both uncoated and MgO-coated electrodes were examined. The improvement of the DSSC efficiency was attributed to an upward shift of the TiO2 flat band energy and a reduction of the rate of back-transport and recombination.
Journal: Materials Science in Semiconductor Processing - Volume 41, January 2016, Pages 114–120