Journal Search Engine
Search Advanced Search Adode Reader(link)
Download PDF Export Citaion korean bibliography PMC previewer
ISSN : 1225-0562(Print)
ISSN : 2287-7258(Online)
Korean Journal of Materials Research Vol.24 No.10 pp.565-571
DOI : https://doi.org/10.3740/MRSK.2014.24.10.565

N-Doped ZnO Nanoparticle-Carbon Nanofiber Composites for Use as Low-Cost Counter Electrode in Dye-Sensitized Solar Cells

Ha-Rim An, Hyo-Jin Ahn
Department of Materials Science and Engineering, Seoul National University of Science and Technology, Seoul 139-743, Korea
Corresponding author
E-Mail : hjahn@seoultech.ac.kr (H.-J. Ahn, Seoul Nat'l Univ. of Sci & Tech.)
2014년 8월 5일 2014년 9월 14일 2014년 9월 25일

Abstract

Nitrogen-doped ZnO nanoparticle-carbon nanofiber composites were prepared using electrospinning. As the relative amounts of N-doped ZnO nanoparticles in the composites were controlled to levels of 3.4, 9.6, and 13.8 wt%, the morphological, structural, and chemical properties of the composites were characterized by means of field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). In particular, the carbon nanofiber composites containing 13.8 wt% N-doped ZnO nanoparticles exhibited superior catalytic properties, making them suitable for use as counter electrodes in dye-sensitized solar cells (DSSCs). This result can be attributed to the enhanced surface roughness of the composites, which offers sites for I3- ion reductions and the formation of Zn3N2 phases that facilitate electron transfer. Therefore, DSSCs fabricated with 13.8 wt% N-doped ZnO nanoparticle-carbon nanofiber composites showed high current denisty (16.3 mA/cm2), high fill factor (57.8%), and excellent power-conversion efficiency (6.69%); at the same time, these DSSCs displayed power-conversion efficiency almost identical to that of DSSCs fabricated with a pure Pt counter electrode (6.57%).

염료감응형 태양전지의 저비용 상대전극을 위한 N-doped ZnO 나노입자-탄소나노섬유 복합체

안하림, 안효진
서울과학기술대학교 신소재공학과

초록


     

    Figure

    Table

    Reference