7% efficiency. The fill factors were strongly dependent on the loading of the carbon black powder and found to be around 68%. Interfacial charge transfer and mass transport were characterized by cyclic voltammetry and electrochemical impedance spectroscopy. This technique of synthesizing nanostructures for high surface area along with optimum carbon black loading afforded an effective and simple way to replace the Pt-based counter electrode for DSSC. Overall, the
TiO2/carbon black-based DSSC showed excellent cell efficiency that rivals cells with a Pt-based CE and exhibited remarkable electrocatalytic activity. This work provides an intriguing way of structurally designing a low-cost, Pt-free, high-performance CE material for DSSCs. Acknowledgements This work was financially supported by the MEST and KETEP selleck kinase inhibitor THZ1 clinical trial (MKE) grants (2012 K001288,
20120009633, and 20114030200010). References 1. O’Regan B, Grätzel M: A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films. MGCD0103 Nature 1991, 353:737–740.CrossRef 2. Nazeeruddin MK, Kay A, Rodicio I, Humphry-Baker R, Müller E, Liska P, Vlachopoulos N, Graetzel M: Conversion of light to electricity by cis-X2bis(2,2′-bipyridyl-4,4′-dicarboxylate)ruthenium(II) charge-transfer sensitizers (X = Cl-, Br-, I-, CN-, and SCN-) on nanocrystalline TiO2 electrodes. J Am Chem Soc 1993, 115:6382–6390.CrossRef 3. Hagfeldt A, Grätzel M: Molecular photovoltaics. Acc Chem Res 2000, 33:269–277.CrossRef 4. Grätzel M: Photoelectrochemical cells. Nature 2001, 414:338–344.CrossRef 5. Lim J, Lee M, Balasingam SK, Kim J, Kim D, Jun Y: Fabrication of panchromatic dye-sensitized solar cells using pre-dye coated TiO2 nanoparticles by a simple dip coating technique. RSC Adv 2013, 3:4801–4805.CrossRef 6. Wu J, Hao S, Lan Z, Lin J, Huang M, Huang Y, Li P, Yin S, Sato T: An all-solid-state
dye-sensitized solar cell-based poly(N-alkyl-4-vinyl- pyridine iodide) electrolyte with efficiency of 5.64%. J Am Chem Soc 2008, 130:11568–11569.CrossRef 7. Saji VS, Jo Y, Moon HR, Jun Y, Song HK: Organic-skinned inorganic nanoparticles: 17-DMAG (Alvespimycin) HCl surface-confined polymerization of 6-(3-thienyl) hexanoic acid bound to nanocrystalline TiO 2. Nanoscale Res Lett 2011, 6:1–5.CrossRef 8. Ramkumar S, Anandan S: Synthesis of bianchored metal free organic dyes for dye sensitized solar cells. Dyes Pigm 2013, 97:397–404.CrossRef 9. Fan J, Hao Y, Cabot A, Johansson EMJ, Boschloo G, Hagfeldt A: Cobalt(II/III) redox electrolyte in ZnO nanowire-based dye-sensitized solar cells. ACS Appl Mater Interfaces 2013, 5:1902–1906.CrossRef 10. Kao MC, Chen HZ, Young SL, Lin CC, Kung CY: Structure and photovoltaic properties of Zno nanowire for dye-sensitized solar cells. Nanoscale Res Lett 2012, 7:1–16.CrossRef 11. Chiu PK, Cho WH, Chen HP, Hsiao CN, Yang JR: Study of a sandwich structure of transparent conducting oxide films prepared by electron beam evaporation at room temperature.