Enhanced‐Light‐Harvesting Amphiphilic Ruthenium Dye for Efficient Solid‐State Dye‐Sensitized Solar Cells

A ruthenium sensitizer (coded C101, NaRu (4,4'-bis(5-hexylthiophen-2-yl)-2,2'-bipyridine) (4-carboxylic acid-4'-caboxylate-2,2'-bipyridine) (NCS)(2)) containing a hexylthiophene-conjugated bipyridyl group as an ancillary ligand is presented for use in solid-state dye-sensitized solar cells (SSDSCs). The high molar. extinction coefficient of this dye is advantageous compared to the widely used Z907 dye, (NaRu (4-carboxylic acid-4'-carboxylate) (4,4'-dinonyl-2,2'-bipyridine) (NCS)(2)). In combination with an organic hole-transporting material (spiro-MeOTAD, 2,2',7,7'-tetrakis-(N,N-di-p-methoxyphenylamine) 9, 9'-spirobifluorene), the C101 sensitizer exhibits an excellent power-conversion efficiency of 4.5% under AM 1.5 solar (100 mW cm(-2)) irradiation in a SSDSC. From electronic-absorption, transient-photovoltage-decay, and impedance measurements it is inferred that extending the pi-conjugation of spectator ligands induces an enhanced light harvesting and retards the charge recombination, thus favoring the photovoltaic performance of a SSDSC.,

[1]  Kuo-Chuan Ho,et al.  Multifunctionalized ruthenium-based supersensitizers for highly efficient dye-sensitized solar cells. , 2008, Angewandte Chemie.

[2]  Feifei Gao,et al.  A new heteroleptic ruthenium sensitizer enhances the absorptivity of mesoporous titania film for a high efficiency dye-sensitized solar cell. , 2008, Chemical communications.

[3]  Juan Bisquert,et al.  Electron transport and recombination in solid-state dye solar cell with spiro-OMeTAD as hole conductor. , 2009, Journal of the American Chemical Society.

[4]  Mingfei Xu,et al.  Efficient and stable solid-state dye-sensitized solar cells based on a high-molar-extinction-coefficient sensitizer. , 2010, Small.

[5]  Ashraful Islam,et al.  Dye-Sensitized Solar Cells with Conversion Efficiency of 11.1% , 2006 .

[6]  Neil Robertson,et al.  Optimizing dyes for dye-sensitized solar cells. , 2006, Angewandte Chemie.

[7]  S. Forrest,et al.  Mixed donor-acceptor molecular heterojunctions for photovoltaic applications. II. Device performance , 2005 .

[8]  Michael Grätzel,et al.  The advent of mesoscopic injection solar cells , 2006 .

[9]  Juan Bisquert,et al.  Interpretation of the Time Constants Measured by Kinetic Techniques in Nanostructured Semiconductor Electrodes and Dye-Sensitized Solar Cells , 2004 .

[10]  R. Crandall.  Modeling of thin film solar cells: Uniform field approximation , 1983 .

[11]  Josef Salbeck,et al.  Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies , 1998, Nature.

[12]  Marco Piccirelli,et al.  High efficiency solid-state photovoltaic device due to inhibition of interface charge recombination , 2001 .

[13]  J. Durrant,et al.  A new ruthenium polypyridyl dye, TG6, whose performance in dye-sensitized solar cells is surprisingly close to that of N719, the ‘dye to beat’ for 17 years , 2008 .

[14]  M. Grätzel,et al.  The influence of charge transport and recombination on the performance of dye-sensitized solar cells. , 2009, Chemphyschem : a European journal of chemical physics and physical chemistry.

[15]  Hidetoshi Miura,et al.  Organic Dye for Highly Efficient Solid‐State Dye‐Sensitized Solar Cells , 2005 .

[16]  M. Grätzel,et al.  On the relevance of mass transport in thin layer nanocrystalline photoelectrochemical solar cells , 1996 .

[17]  M. Grätzel,et al.  A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films , 1991, Nature.

[18]  Laurence Peter,et al.  "Sticky electrons" transport and interfacial transfer of electrons in the dye-sensitized solar cell. , 2009, Accounts of chemical research.

[19]  L. Peter,et al.  Dye-sensitized nanocrystalline solar cells. , 2007, Physical chemistry chemical physics : PCCP.

[20]  Eiji Suzuki,et al.  Alkyl-functionalized organic dyes for efficient molecular photovoltaics. , 2006, Journal of the American Chemical Society.

[21]  Peng Wang,et al.  High‐Performance Liquid and Solid Dye‐Sensitized Solar Cells Based on a Novel Metal‐Free Organic Sensitizer , 2008 .

[22]  Klaus Meerholz,et al.  Efficiency enhancements in solid-state hybrid solar cells via reduced charge recombination and increased light capture. , 2007, Nano letters.

[23]  Juan Bisquert,et al.  Simulation of Steady-State Characteristics of Dye- Sensitized Solar Cells and the Interpretation of the Diffusion Length , 2010 .

[24]  C. Brabec,et al.  Plastic Solar Cells , 2001 .

[25]  Yuan Wang,et al.  Enhance the optical absorptivity of nanocrystalline TiO2 film with high molar extinction coefficient ruthenium sensitizers for high performance dye-sensitized solar cells. , 2008, Journal of the American Chemical Society.

[26]  Assaf Y Anderson,et al.  Structure/function relationships in dyes for solar energy conversion: a two-atom change in dye structure and the mechanism for its effect on cell voltage. , 2009, Journal of the American Chemical Society.

[27]  Laurence M. Peter,et al.  How Efficient Is Electron Collection in Dye-Sensitized Solar Cells? Comparison of Different Dynamic Methods for the Determination of the Electron Diffusion Length , 2009 .

[28]  Jia-Hung Tsai,et al.  Highly efficient light-harvesting ruthenium sensitizer for thin-film dye-sensitized solar cells. , 2009, ACS nano.

[29]  Arthur J. Frank,et al.  CHARGE RECOMBINATION IN DYE-SENSITIZED NANOCRYSTALLINE TIO2 SOLAR CELLS , 1997 .

[30]  R. Tscharner,et al.  Photovoltaic technology: the case for thin-film solar cells , 1999, Science.

[31]  P. Liska,et al.  Engineering of efficient panchromatic sensitizers for nanocrystalline TiO(2)-based solar cells. , 2001, Journal of the American Chemical Society.

[32]  J. Durrant,et al.  Kinetic and energetic paradigms for dye-sensitized solar cells: moving from the ideal to the real. , 2009, Accounts of chemical research.

[33]  Klaas Bakker,et al.  Measuring charge transport from transient photovoltage rise times. A new tool to investigate electron transport in nanoparticle films. , 2006, The journal of physical chemistry. B.

[34]  Guido Viscardi,et al.  Combined experimental and DFT-TDDFT computational study of photoelectrochemical cell ruthenium sensitizers. , 2005, Journal of the American Chemical Society.

[35]  G. Oskam,et al.  Electron Diffusion and Back Reaction in Dye-Sensitized Solar Cells: The Effect of Nonlinear Recombination Kinetics , 2010 .

[36]  Kuo-Chuan Ho,et al.  A ruthenium complex with superhigh light-harvesting capacity for dye-sensitized solar cells. , 2006, Angewandte Chemie.

[37]  Juan Bisquert,et al.  Physical Chemical Principles of Photovoltaic Conversion with Nanoparticulate, Mesoporous Dye-Sensitized Solar Cells , 2004 .

[38]  Claudia Barolo,et al.  Electron-rich heteroaromatic conjugated bipyridine based ruthenium sensitizer for efficient dye-sensitized solar cells. , 2008, Chemical communications.

[39]  M. Grätzel,et al.  Passivation of nanocrystalline TiO2 junctions by surface adsorbed phosphinate amphiphiles enhances the photovoltaic performance of dye sensitized solar cells. , 2009, Dalton transactions.

[40]  K. Ho,et al.  A New Route to Enhance the Light‐Harvesting Capability of Ruthenium Complexes for Dye‐Sensitized Solar Cells , 2007 .

[41]  K. Wijayantha,et al.  A novel charge extraction method for the study of electron transport and interfacial transfer in dye sensitised nanocrystalline solar cells , 2000 .

[42]  M. Grätzel,et al.  Surface Design in Solid‐State Dye Sensitized Solar Cells: Effects of Zwitterionic Co‐adsorbents on Photovoltaic Performance , 2009 .

[43]  Jinho Chang,et al.  Dye-sensitized solar cell and electrochemical supercapacitor applications of electrochemically deposited hydrophilic and nanocrystalline tin oxide film electrodes , 2009 .