Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 115, Issue 51, Pages 25529-25534Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp208295b
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Funding
- Korea Small and Medium Business Administration [00041548-1]
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[Pt hollow spheres] electrodes and [Pt-sputtered + Pt hollow spheres] electrodes were fabricated on fluorine-doped tin oxide (FTO) glass as counter electrodes for dye-sensitized solar cells (DSCs), after sputtering platinum (Pt) on polystyrene microspheres and annealing them at 500 degrees C for 30 min. Electrochemical impedance measurement revealed that the charge transfer resistances of [Pt hollow spheres] electrodes and [Pt-sputtered + Pt hollow spheres] electrodes were 0.91 Omega cm(2) and 0.48 Omega cm(2), respectively, which were less than that of 1.28 Omega cm(2) obtained from [Pt-sputtered] electrode. Furthermore, the DSCs with [Pt hollow spheres] and [Pt-sputtered + Pt hollow spheres] electrodes exhibited high energy-conversion efficiencies of 8.20(+/- 0.10)% and 8.53(+/- 0.08)%, respectively, which were both higher than the 7.89(+/- 0.05)% efficiency of the DSC with [Pt-sputtered] electrodes.
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