Optimization of a quasi-solid-state dye-sensitized solar cell employing a nanocrystal–polymer composite electrolyte modified with water and ethanol

A quasi-solid-state dye-sensitized solar cell employing a poly(ethylene oxide)-poly(vinylidene fluoride) (PEO-PVDF)/TiO2 gel electrolyte modified by various concentrations of water and ethanol is described. It is shown that the introduction of water and ethanol prevents the crystallization of the polymer matrix, and enhances the free I(-)/I(3)(-) concentration and the networks for ion transportation in the electrolyte, thus leading to an improvement in conductivity. A high energy conversion efficiency of about 5.8% is achieved by controlling the additive concentration in the electrolyte. Optimization of the additive-modified electrolyte performance has been obtained by studying the cross-linking behavior of water and ethanol with Fourier transform infrared (FTIR), differential scanning calorimetry (DSC) and viscosity measurements, and the electrical conduction behavior of the electrolyte with impedance spectra measurements.

[1]  Xingzhong Zhao,et al.  End-functional silicone coupling agent modified PEO/P(VDF-HFP)/SiO2 nanocomposite polymer electrolyte DSSC , 2008, Nanotechnology.

[2]  Jung-Ki Park,et al.  Effect of silica on the electrochemical characteristics of the plasticized polymer electrolytes based on the P(AN-co-MMA) copolymer , 2000 .

[3]  G. D. Smith,et al.  Molecular dynamics simulation study of hydrogen bonding in aqueous poly(ethylene oxide) solutions. , 2000, Physical review letters.

[4]  D. Yan,et al.  Eutectic‐forming binary system of poly(ethylene oxide) and p‐hydroxybenzaldehyde , 2003 .

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

[6]  Paschalis Alexandridis,et al.  Interaction of poloxamer block copolymers with cosolvents and surfactants , 2001 .

[7]  Donald Fitzmaurice,et al.  Spectroscopic determination of flatband potentials for polycrystalline TiO2 electrodes in mixed solvent systems , 1994 .

[8]  Satoshi Mikoshiba,et al.  Ionic liquid type dye-sensitized solar cells: increases in photovoltaic performances by adding a small amount of water , 2005 .

[9]  Xingzhong Zhao,et al.  Conductive carbon nanoparticles hybrid PEO/P(VDF-HFP)/SiO2 nanocomposite polymer electrolyte type dye sensitized solar cells , 2007 .

[10]  C. Pan,et al.  Multiple morphologies of self-assembled star aggregates of amphiphilic PEO-b-PNPMA diblock copolymers in solution, synthesis and micellization , 2007 .

[11]  Michael A. Henderson,et al.  Structural Sensitivity in the Dissociation of Water on TiO2 Single-Crystal Surfaces , 1996 .

[12]  Polycarpos Falaras,et al.  Binary Polyethylene Oxide/Titania Solid-State Redox Electrolyte for Highly Efficient Nanocrystalline TiO2 Photoelectrochemical Cells , 2002 .

[13]  Akira Fujishima,et al.  Fabrication of an efficient solid-state dye-sensitized solar cell , 2003 .

[14]  Satoshi Mikoshiba,et al.  Quasi-solid dye-sensitized solar cells containing chemically cross-linked gel: How to make gels with a small amount of gelator , 2002 .

[15]  T. Kitamura,et al.  Quasi-Solid-State Dye-Sensitized TiO2 Solar Cells: Effective Charge Transport in Mesoporous Space Filled with Gel Electrolytes Containing Iodide and Iodine , 2001 .

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

[17]  J. P. Sharma,et al.  Nanodispersed polymer gel electrolytes: Conductivity modification with the addition of PMMA and fumed silica , 2007 .

[18]  S. Greenbaum,et al.  Electrical, thermal and NMR investigation of composite solid electrolytes based on PEO, LiI and high surface area inorganic oxides , 1998 .

[19]  P. Luckham,et al.  The effects of hydrogen bonding upon the viscosity of aqueous poly(vinyl alcohol) solutions , 2000 .

[20]  S. Haque,et al.  Interface engineering for solid-state dye-sensitised nanocrystalline solar cells: the use of an organic redox cascade. , 2006, Chemical communications.

[21]  S. S. Sekhon.  Conductivity behaviour of polymer gel electrolytes: Role of polymer , 2003 .

[22]  S. Lindquist,et al.  Donor–acceptor interaction between non-aqueous solvents and I2 to generate I−3, and its implication in dye sensitized solar cells , 1999 .

[23]  The use of poly(vinylpyridine-co-acrylonitrile) in polymer electrolytes for quasi-solid dye-sensitized solar cells , 2007 .

[24]  Moon-Sung Kang,et al.  Dye-sensitized solar cells based on crosslinked poly(ethylene glycol) electrolytes , 2006 .

[25]  E. Woo,et al.  Influence of molecular interactions on spherulite morphology in miscible poly(ethylene oxide)/epoxy network versus poly( ethylene oxide) /poly (4-vinyl phenol) blend , 2002 .

[26]  Wei Liu,et al.  Effect of lithium iodide addition on poly(ethylene oxide)-poly(vinylidene fluoride) polymer-blend electrolyte for dye-sensitized nanocrystalline solar cell. , 2008, The journal of physical chemistry. B.

[27]  D. Pradhan,et al.  Effect of plasticizer on structure—property relationship in composite polymer electrolytes , 2005 .

[28]  S. Fang,et al.  Polymer electrolytes from PEO and novel quaternary ammonium iodides for dye-sensitized solar cells , 2003 .

[29]  Dongliang Wang,et al.  Porous PVDF asymmetric hollow fiber membranes prepared with the use of small molecular additives , 2000 .

[30]  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.

[31]  Peng Wang,et al.  A New Ionic Liquid Electrolyte Enhances the Conversion Efficiency of Dye-Sensitized Solar Cells , 2003 .

[32]  T. Kato,et al.  Quasi-solid dye sensitized solar cells solidified with chemically cross-linked gelators: Control of TiO2/gel electrolytes and counter Pt/gel electrolytes interfaces , 2004 .

[33]  Peng Wang,et al.  A stable quasi-solid-state dye-sensitized solar cell with an amphiphilic ruthenium sensitizer and polymer gel electrolyte , 2003, Nature materials.

[34]  Jihuai Wu,et al.  Gel polymer electrolyte based on poly(acrylonitrile-co-styrene) and a novel organic iodide salt for quasi-solid state dye-sensitized solar cell , 2006 .

[35]  Xingzhong Zhao,et al.  Improved stability of quasi-solid-state dye-sensitized solar cell based on poly (ethylene oxide)–poly (vinylidene fluoride) polymer-blend electrolytes , 2008 .