Effects of Dye Loading Conditions on the Energy Conversion Efficiency of ZnO and TiO2 Dye-Sensitized Solar Cells

In this paper, we report the significant effects of dye loading conditions on the overall light conversion efficiency of zinc oxide (ZnO) film electrodes in dye-sensitized solar cells. A comparison of the ZnO film electrodes was also made with TiO2 film electrodes prepared with similar dye loading conditions. It was found that using a higher and lower dye concentration requires a shorter and longer immersion time, respectively, for optimal sensitization of ZnO to obtain maximum efficiencies. A similar trend was found for the TiO2 film electrode as well; however, smaller differences in the overall light conversion efficiencies were observed with varying dye concentration and immersion time. It was found that the chemical stability was an issue for the ZnO film electrodes but was not pertinent for the TiO2 film electrodes. The film quality and structure of the ZnO film differed after prolonged immersion in high dye concentration, where the formation of N3 dye and Zn2+ aggregates and/or the deterioration of ...

[1]  Guozhong Cao,et al.  Hierarchically Structured ZnO Film for Dye‐Sensitized Solar Cells with Enhanced Energy Conversion Efficiency , 2007 .

[2]  Dongsheng Xu,et al.  Hierarchical ZnO Nanostructures Obtained by Electrodeposition , 2007 .

[3]  D. Suh,et al.  The fabrication and characterization of dye-sensitized solar cells with a branched structure of ZnO nanowires , 2007 .

[4]  Joseph T Hupp,et al.  ZnO nanotube based dye-sensitized solar cells. , 2007, Nano letters.

[5]  Guo-Qiang Lo,et al.  Improved dye-sensitized solar cells with a ZnO-nanoflower photoanode , 2007 .

[6]  Chen-Hao Ku,et al.  Effects of dye adsorption on the electron transport properties in ZnO-nanowire dye-sensitized solar cells , 2007 .

[7]  G. Cao,et al.  Titania Particle Size Effect on the Overall Performance of Dye-Sensitized Solar Cells , 2007 .

[8]  Tomas Edvinsson,et al.  Comparison of Dye-Sensitized ZnO and TiO2 Solar Cells: Studies of Charge Transport and Carrier Lifetime , 2007 .

[9]  Sun-Ki Min,et al.  Achievement of 4.51% conversion efficiency using ZnO recombination barrier layer in TiO2 based dye-sensitized solar cells , 2006 .

[10]  Aleksandra Radenovic,et al.  ZnO-Al2O3 and ZnO-TiO2 core-shell nanowire dye-sensitized solar cells. , 2006, The journal of physical chemistry. B.

[11]  D. L. King,et al.  Solar cell efficiency tables (version 28) , 2006 .

[12]  E. Aydil,et al.  Synthesis and characterization of ZnO nanowires and their integration into dye-sensitized solar cells , 2006 .

[13]  Tsukasa Yoshida,et al.  Dye Sensitization of ZnO by Unsymmetrical Squaraine Dyes Suppressing Aggregation , 2006 .

[14]  E. Aydil,et al.  Dye-sensitized solar cells based on semiconductor morphologies with ZnO nanowires , 2006 .

[15]  Yanfeng Gao,et al.  Morphology evolution of ZnO thin films from aqueous solutions and their application to solar cells. , 2006, Langmuir : the ACS journal of surfaces and colloids.

[16]  R. Mane,et al.  Nanocrystalline TiO2/ZnO thin films: fabrication and application to dye-sensitized solar cells. , 2005, The journal of physical chemistry. B.

[17]  Peidong Yang,et al.  Nanowire dye-sensitized solar cells , 2005, Nature materials.

[18]  Eray S. Aydil,et al.  Nanowire-based dye-sensitized solar cells , 2005 .

[19]  Michael Grätzel,et al.  Conversion of sunlight to electric power by nanocrystalline dye-sensitized solar cells , 2004 .

[20]  A. J. Frank,et al.  Morphological and photoelectrochemical characterization of core-shell nanoparticle films for dye-sensitized solar cells: Zn-O type shell on SnO2 and TiO2 cores. , 2004, Langmuir : the ACS journal of surfaces and colloids.

[21]  Marius Grundmann,et al.  High electron mobility of epitaxial ZnO thin films on c-plane sapphire grown by multistep pulsed-laser deposition , 2003 .

[22]  R. Katoh,et al.  Electron Injection Efficiency from Excited N3 into Nanocrystalline ZnO Films: Effect of (N3−Zn2+) Aggregate Formation , 2003 .

[23]  Anders Hagfeldt,et al.  Nanostructured ZnO electrodes for dye-sensitized solar cell applications , 2002 .

[24]  Anders Hagfeldt,et al.  A 5% efficient photoelectrochemical solar cell based on nanostructured ZnO electrodes , 2002 .

[25]  Anders Hagfeldt,et al.  Electron injection and recombination in Ru(dcbpy)2(NCS)2 sensitized nanostructured ZnO , 2001 .

[26]  M. Grätzel.  Photoelectrochemical cells : Materials for clean energy , 2001 .

[27]  Anders Hagfeldt,et al.  Studies of the adsorption process of Ru complexes in nanoporous ZnO electrodes , 2000 .

[28]  Th. Dittrich,et al.  Electron Drift Mobility in Porous TiO2 (Anatase) , 1998 .

[29]  Mohammad Khaja Nazeeruddin,et al.  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 titanium dioxide electrodes , 1993 .