Organic redox couples and organic counter electrode for efficient organic dye-sensitized solar cells.

A series of organic thiolate/disulfide redox couples have been synthesized and have been studied systematically in dye-sensitized solar cells (DSCs) on the basis of an organic dye (TH305). Photophysical, photoelectrochemical, and photovoltaic measurements were performed in order to get insights into the effects of different redox couples on the performance of DSCs. The polymeric, organic poly(3,4-ethylenedioxythiophene) (PEDOT) material has also been introduced as counter electrode in this kind of noniodine-containing DSCs showing a promising conversion efficiency of 6.0% under AM 1.5G, 100 mW·cm(-2) light illumination. Detailed studies using electrochemical impedance spectroscopy and linear-sweep voltammetry reveal that the reduction of disulfide species is more efficient on the PEDOT counter electrode surface than on the commonly used platinized conducting glass electrode. Both pure and solvated ionic-liquid electrolytes based on a thiolate anion have been studied in the DSCs. The pure and solvated ionic-liquid-based electrolytes containing an organic redox couple render efficiencies of 3.4% and 1.2% under 10 mW·cm(-2) light illumination, respectively.

[1]  Jing Liu,et al.  Tuning of phenoxazine chromophores for efficient organic dye-sensitized solar cells. , 2009, Chemical communications.

[2]  Michael Grätzel,et al.  An alternative efficient redox couple for the dye-sensitized solar cell system. , 2003, Chemistry.

[3]  Anders Hagfeldt,et al.  A p-type NiO-based dye-sensitized solar cell with an open-circuit voltage of 0.35 V. , 2009, Angewandte Chemie.

[4]  D. Macfarlane,et al.  Electrodeposited PEDOT-on-plastic cathodes for dye-sensitized solar cells. , 2010, Chemical communications.

[5]  Peng Wang,et al.  High-efficiency organic dye-sensitized mesoscopic solar cells with a copper redox shuttle. , 2011, Chemical communications.

[6]  T. Kitamura,et al.  Photo-sensitizing ruthenium complexes for solid state dye solar cells in combination with conducting polymers as hole conductors , 2004 .

[7]  S. Zakeeruddin,et al.  Stable mesoscopic dye-sensitized solar cells based on tetracyanoborate ionic liquid electrolyte. , 2006, Journal of the American Chemical Society.

[8]  Tomas Edvinsson,et al.  A novel organic chromophore for dye-sensitized nanostructured solar cells. , 2006, Chemical communications.

[9]  N. Oyama,et al.  Kinetic Studies for the Electrocatalytic Reduction of Bis(2-mercapto-1,3,4-thiadiazoyl)-5,5‘-disulfide at a Poly(3,4-ethylenedioxythiophene) Film-Modified Electrode via Rotating-Disk Electrode Voltammetry , 2007 .

[10]  Juan Bisquert,et al.  Influence of electrolyte in transport and recombination in dye-sensitized solar cells studied by impedance spectroscopy , 2005 .

[11]  S. Zakeeruddin,et al.  CoII(dbbip)22+ Complex Rivals Tri-iodide/Iodide Redox Mediator in Dye-Sensitized Photovoltaic Cells , 2001 .

[12]  Anders Hagfeldt,et al.  Two novel carbazole dyes for dye-sensitized solar cells with open-circuit voltages up to 1 V based on Br(-)/Br(3)(-) electrolytes. , 2009, Organic letters.

[13]  Héctor D. Abruña,et al.  Synthesis, computational and electrochemical characterization of a family of functionalized dimercap , 2007 .

[14]  Efficient organic dye sensitized solar cells based on modified sulfide/polysulfide electrolyte , 2011 .

[15]  Brian A. Gregg,et al.  Interfacial Recombination Processes in Dye-Sensitized Solar Cells and Methods To Passivate the Interfaces , 2001 .

[16]  Kazuharu Suzuki,et al.  Solid-state dye-sensitized solar cells fabricated by coupling photoelectrochemically deposited poly(3,4-ethylenedioxythiophene) (PEDOT) with silver-paint on cathode. , 2011, Chemical communications.

[17]  G. Boschloo,et al.  Design of organic dyes and cobalt polypyridine redox mediators for high-efficiency dye-sensitized solar cells. , 2010, Journal of the American Chemical Society.

[18]  A. Hagfeldt,et al.  Efficient organic-dye-sensitized solar cells based on an iodine-free electrolyte. , 2010, Angewandte Chemie.

[19]  Michael Grätzel,et al.  Solvent‐Free Ionic Liquid Electrolytes for Mesoscopic Dye‐Sensitized Solar Cells , 2009 .

[20]  Arthur J. Nozik,et al.  Photosensitization of nanoporous TiO2 electrodes with InP quantum dots , 1998 .

[21]  Leone Spiccia,et al.  High-efficiency dye-sensitized solar cells with ferrocene-based electrolytes. , 2011, Nature chemistry.

[22]  Yanhong Luo,et al.  Non‐Corrosive, Non‐Absorbing Organic Redox Couple for Dye‐Sensitized Solar Cells , 2010 .

[23]  Michael Grätzel,et al.  An organic redox electrolyte to rival triiodide/iodide in dye-sensitized solar cells. , 2010, Nature chemistry.

[24]  Investigation of Iodine Concentration Effects in Electrolytes for Dye-Sensitized Solar Cells , 2010 .

[25]  Nam-Gyu Park,et al.  Dye-sensitized solar cells with Pt- and TCO-free counter electrodes. , 2010, Chemical communications.

[26]  Peng Wang,et al.  A solvent-free, SeCN-/(SeCN)3- based ionic liquid electrolyte for high-efficiency dye-sensitized nanocrystalline solar cells. , 2004, Journal of the American Chemical Society.

[27]  Y. Sung,et al.  Solid-state dye-sensitized TiO2 solar cells using poly(3,4-ethylenedioxythiophene) as substitutes of iodine/iodide electrolytes and noble metal catalysts on FTO counter electrodes , 2008 .

[28]  Peng Wang,et al.  High-performance dye-sensitized solar cells based on solvent-free electrolytes produced from eutectic melts. , 2008, Nature materials.

[29]  Gerko Oskam,et al.  Dye-sensitized SnO2 electrodes with iodide and pseudohalide redox mediators. , 2005, The journal of physical chemistry. B.

[30]  H. Pettersson,et al.  The Performance and Stability of Ambient Temperature Molten Salts for Solar Cell Applications , 1996 .

[31]  Brian A. Gregg,et al.  The Photovoltage-Determining Mechanism in Dye-Sensitized Solar Cells , 2000 .

[32]  C. M. Elliott,et al.  Substituted polypyridine complexes of cobalt(II/III) as efficient electron-transfer mediators in dye-sensitized solar cells. , 2002, Journal of the American Chemical Society.

[33]  Michael Grätzel,et al.  Transport and interfacial transfer of electrons in dye-sensitized solar cells utilizing a Co(dbbip)2 redox shuttle , 2010 .

[34]  Takayuki Kitamura,et al.  Volatile solvent-free solid-state polymer-sensitized TiO2 solar cells with poly(3,4-ethylenedioxythiophene) as a hole-transporting medium. , 2005, Chemical communications.

[35]  Takayuki Kitamura,et al.  Quasi-solid-state dye-sensitized solar cells using room temperature molten salts and a low molecular weight gelator. , 2002, Chemical communications.

[36]  Peng Wang,et al.  Gelation of ionic liquid-based electrolytes with silica nanoparticles for quasi-solid-state dye-sensitized solar cells. , 2003, Journal of the American Chemical Society.

[37]  M. Akabas,et al.  Synthesis of GABAA receptor agonists and evaluation of their alpha-subunit selectivity and orientation in the GABA binding site. , 2008, Journal of medicinal chemistry.

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

[39]  Shozo Yanagida,et al.  Iodine/iodide-free dye-sensitized solar cells. , 2009, Accounts of chemical research.

[40]  Takurou N. Murakami,et al.  The 2,2,6,6‐Tetramethyl‐1‐piperidinyloxy Radical: An Efficient, Iodine‐ Free Redox Mediator for Dye‐Sensitized Solar Cells , 2008 .

[41]  D. Wong,et al.  A novel deep eutectic solvent-based ionic liquid used as electrolyte for dye-sensitized solar cells , 2009 .

[42]  C. M. Elliott,et al.  Efficient non-corrosive electron-transfer mediator mixtures for dye-sensitized solar cells. , 2006, Journal of the American Chemical Society.

[43]  M. Grätzel,et al.  Dye-sensitized solar cells incorporating a "liquid" hole-transporting material. , 2006, Nano letters.

[44]  Mechanism of charge recombination and IPCE in ZnO dye‐sensitized solar cells having I−/I  3− and Br−/Br  3− redox couple , 2011 .

[45]  Peter C. Searson,et al.  Pseudohalogens for Dye-Sensitized TiO2 Photoelectrochemical Cells , 2001 .

[46]  Monica Lira-Cantu,et al.  Influence of doped anions on poly(3,4-ethylenedioxythiophene) as hole conductors for iodine-free solid-state dye-sensitized solar cells. , 2008, Journal of the American Chemical Society.

[47]  Takayuki Kitamura,et al.  Application of poly(3,4-ethylenedioxythiophene) to counter electrode in dye-sensitized solar cells , 2002 .

[48]  H. Ågren,et al.  Wave-Function Engineering of CdSe/CdS Core/Shell Quantum Dots for Enhanced Electron Transfer to a TiO2 Substrate , 2010 .

[49]  Anders Hagfeldt,et al.  Tuning the HOMO energy levels of organic dyes for dye-sensitized solar cells based on Br-/Br3- electrolytes. , 2010, Chemistry.

[50]  Wenjing Hong,et al.  Transparent graphene/PEDOT–PSS composite films as counter electrodes of dye-sensitized solar cells , 2008 .

[51]  C. Bignozzi,et al.  Combination of cobalt and iron polypyridine complexes for improving the charge separation and collection in Ru(terpyridine)(2)-sensitised solar cells. , 2010, Chemistry.

[52]  Mohammad Khaja Nazeeruddin,et al.  Dye-sensitized solar cells based on poly (3,4-ethylenedioxythiophene) counter electrode derived from ionic liquids , 2010 .

[53]  Kazuhiro Sayama,et al.  Efficient eosin y dye-sensitized solar cell containing Br-/Br3- electrolyte. , 2005, The journal of physical chemistry. B.