Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Synthesis of Porous $TiO_2$ Thin Films Using PVC-g-PSSA Graft Copolymer and Their Use in Dye-sensitized Solar Cells

PVC-g-PSSA 가지형 공중합체를 이용한 다공성 $TiO_2$ 박막의 합성 및 염료감응 태양전지 응용

  • Byun, Su-Jin (Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Seo, Jin-Ah (Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Chi, Won-Seok (Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Shul, Yong-Gun (Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Kim, Jong-Hak (Department of Chemical and Biomolecular Engineering, Yonsei University)
  • 변수진 (연세대학교 화공생명공학과) ;
  • 서진아 (연세대학교 화공생명공학과) ;
  • 지원석 (연세대학교 화공생명공학과) ;
  • 설용건 (연세대학교 화공생명공학과) ;
  • 김종학 (연세대학교 화공생명공학과)
  • Received : 2011.04.27
  • Accepted : 2011.06.24
  • Published : 2011.06.30
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Abstract

An amphiphilic graft copolymer comprising a poly(vinyl chloride) (PVC) backbone and poly (styrene sulfonic acid) (PSSA) side chains (PVC-g-PSSA) was synthesized via atom transfer radical polymerization (ATRP). Mesoporous titanium dioxide $(TiO_2)$ films with crystalline anatase phase were synthesized via a sol-gel process by templating PVC-g-PSSA graft copolymer. Titanium isopropoxide (TTIP), a $TiO_2$ precursor was selectively incorporated into the hydrophilic PSSA domains of the graft copolymer and grew to form mesoporous $TiO_2$ films, as confirmed by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. The performances of dye-sensitized solar cell (DSSC) were systematically investigated by varying spin coating times and the amounts of P25 nanoparticies. The energy conversion efficiency reached up to 2.7% at 100 mW/$cm^2$ upon using quasi-solid-state polymer electrolyte.

원자전달 라디칼 중합(ATRP)에 의해 poly(vinyl chloride) (PVC) 주사슬과 poly(styrene sulfonic acid) (PSSA) 곁사슬로 되어있는 양쪽성 PVC-g-PSSA 가지형 공중합체를 합성하였다. PVC-g-PSSA 가지형 공중합체 고분자를 템플레이트로 사용하고 졸겔법을 적용하여, 결정성 아타네제상의 미세기공 이산화티타튬 필름을 제조하였다. $TiO_2$ 전구체인 TTIP를 친수성인 PSSA 영역과 선택적으로 작용시켜 $TiO_2$ 메조기공 필름을 성장하였으며, 이를 주사전자 현미경 (SEM)과 엑스레이회절 (XRD)분석을 통해 분석하였다. 스핀코팅 횟수와 P25 도입에 따른 염료감응 태양전지 성능을 체계적으로 분석하였다. 그 결과 준고체 고분자 전해질을 이용하였을 때, 100 mW/$cm^2$ 조건에서 에너지 변환 효율이 2.7%에 이르렀다.

Keywords

References

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