화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.17, No.12, 963-968, December, 2009
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New Liquid Crystal-Embedded PVdF-co-HFP-Based Polymer Electrolytes for Dye-Sensitized Solar Cell Applications
G. Vijayakumar, Meyoung Jin Lee, Myungkwan Song, Sung-Ho Jin†, Jae Wook Lee1, †, Chan Woo Lee2, Yeong-Soon Gal3, Hyo Jin Shim4, Yongku Kang4, Gi-Won Lee5, Kyungkon Kim5, Nam-Gyu Park5, and Suhkmann Kim6, †
  • Department of Chemistry Education, Interdisciplinary Program of Advanced Information and Display Materials,and Center for Plastic Information System, Pusan National University, Busan 609-735, Korea
  • 1Department of Chemistry, Dong-A University, Busan 604-714, Korea
  • 2Department of Chemistry, University of Ulsan, Ulsan 680-749, Korea
  • 3Polymer Chemistry Lab, Kyungil University, Hayang 712-70, Korea
  • 4Advanced Materials Division, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
  • 5Center for Energy Materials Research, Materials Science and Technology Division, Korea Institute of Science and Technology, Seoul 136-791, Korea
  • 6Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 609-735, Korea
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Liquid crystal (LC; E7 and/or ML-0249)-embedded, poly(vinylidenefluoride-co-hexafluoropropylene) (PVdF-co-HFP)-based, polymer electrolytes were prepared for use in dye-sensitized solar cells (DSSCs). The electrolytes contained 1-methyl-3-propylimidazolium iodide (PMII), tetrabutylammonium iodide (TBAI), and iodine (I2), which participate in the I3-/I- redox couple. The incorporation of photochemically stable PVdF-co-HFP in the DSSCs created a stable polymer electrolyte that resisted leakage and volatilization. DSSCs, with liquid crystal (LC)-embedded PVdF-co-HFP-based polymer electrolytes between the amphiphilic ruthenium dye N719 absorbed to the nanocrystalline TiO2 photoanode and the Pt counter electrode, were fabricated. These DSSCs displayed enhanced redox couple reduction and reduced charge recombination in comparison to that fabricated from the conventional PVdF-co-HFP-based polymer electrolyte. The behavior of the polymer electrolyte was improved by the addition of optimized amounts of plasticizers, such as ethylene carbonate (EC) and propylene carbonate (PC). The significantly increased short-circuit current density (J(sc), 14.60 mA/cm2) and open-circuit voltage (V(oc), 0.68 V) of these DSSCs led to a high power conversion efficiency (PCE) of 6.42% and a fill factor of 0.65 under a standard light intensity of 100 mW/cm2 irradiation of AM 1.5 sunlight. A DSSC fabricated by using E7-embedded PVdF-co-HFP-based polymer electrolyte exhibited a maximum incident photon-to-current conversion efficiency (IPCE) of 50%.
Keywords:liquid crystal;PVdF-co-HFP;polymer electrolyte;dye-sensitized solar cells;photovoltaic performance
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