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2016 Vol.26, Issue 11 Preview Page
Ni Nanoparticles-Graphitic Carbon Nanofiber Composites for Pt-Free Counter Electrode in Dye-Sensitized Solar Cells

염료감응 태양전지의 비백금 상대전극을 위한 니켈 나노입자-흑연질 탄소나노섬유 복합체

Dong-Hyeun Oh1
,
Bon-Ryul Koo2
,
Yu-Jin Lee1
,
HyeLan An1
,
Hyo-Jin Ahn12†
오 동현1
,
구 본율2
,
이 유진1
,
안 혜란1
,
안 효진12†
1Department of Materials Science and Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
2Program of Materials Science & Engineering, Convergence Institute of Biomedical Engineering and Biomaterials, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
1서울과학기술대학교 신소재공학과
2서울과학기술대학교 의공학-바이오소재 융합 협동과정 신소재공학프로그램
†Corresponding author : hjahn@seoultech.ac.kr (H. -J. Ahn, Seoul Nat’l Univ. Sci. Technol.)
November 2016. pp. 649-655
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Abstract

Ni nanoparticles (NPs)-graphitic carbon nanofiber (GCNF) composites were fabricated using an electrospinning method. The amounts of Ni precursor used as catalyst for the catalytic graphitization were controlled at 0, 2, 5, and 8 wt% to improve the photovoltaic performances of the nanoparticles and make them suitable for use as counter electrodes for dyesensitized solar cells (DSSCs). As a result, Ni NPs-GCNF composites that were fabricated with 8 wt% Ni precursors showed a high circuit voltage (0.73 V), high photocurrent density (14.26 mA/cm2), and superb power-conversion efficiency (6.72%) when compared to those characteristics of other samples. These performance improvements can be attributed to the reduced charge transport resistance that results from the synergetic effect of the superior catalytic activity of Ni NPs and the efficient charge transfer due to the formation of GCNF with high electrical conductivity. Thus, Ni NPs-GCNF composites may be used as promising counter electrodes in DSSCs.

Keywords
Ni nanoparticles-graphitic carbon nanofibers
catalytic graphitization
dye-sensitized solar cells
counter electrodes
Pt-free.
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 26
  • No :11
  • Pages :649-655
  • Received Date : 2016-08-30
  • Revised Date : 2016-10-19
  • Accepted Date : 2016-10-19
  • DOI :https://doi.org/10.3740/MRSK.2016.26.11.649
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