Macromolecular Chemistry and Physics
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
October 26, 2010
Functional Polymers: Side-chain liquid-crystalline polymers for dye-sensitized solar-cells application
J. S. Park, Y. H. Kim, M. Song, C.-H. Kim, M. A. Karim, J. W. Lee, Y.-S. Gal, P. Kumar, S.-W. Kang,* S.-H. Jin*
Dye-sensitized solar cells (DSSCs) have arisen tremendous interest as these devices can be produced in a facile and low-cost way for applications generating energy. However, the commonly incorporated liquid electrolytes cause potential problems i.e. leakage and volatilization of the organic solvents, which currently limits the long term stability of DSSCs. Solid and semi-solid substances are considered as an interesting alternative. For this purpose two side-chain liquid crystalline polymers were synthesized attaching the side-chains in a very controlled matter to the polymer backbone via click-chemistry. The new substances are incorporated as matrices for electrolytes in DSSCs. Eventhough the power conversion efficiency (4%) does not reach the performance of the liquid counterparts, a comparison with the non-liquid crystalline polymer polyacrylonitrile showed their improved photovoltaic performance. The authors attribute these observations to the liquid crystalline behavior, i.e. ion mobility and miscibility of the polymer-electrolyte components. These results are promising approaches for the development of new materials for enhanced DSSCs’ performance.
Macromol. Chem. Phys., DOI: 10.1002/macp.201000264