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Korean Journal of Metals and Materials > Volume 55(6); 2017 > Article
Korean Journal of Metals and Materials 2017;55(6): 440-445. doi: https://doi.org/10.3365/KJMM.2017.55.6.440
염료감응형 태양전지용 니켈실리사이드 촉매재료의 물성 연구
박태열, 김광배, 송오성
서울시립대학교 신소재공학과
Properties of the Catalytic Nickel Silicides for a Dye-Sensitized Solar Cell
Taeyeul Park, Kwangbae Kim, Ohsung Song
Department of Materials Science and Engineering, University of Seoul, Seoul 02504, Republic of Korea
Correspondence  Ohsung Song ,Tel: +82-2-6490-2410, Email: songos@uos.ac.kr
Received: 23 November 2016;  Accepted: 10 January 2017.  Published online: 1 June 2017.
We have investigated the properties of nickel silicides as catalysts for dye-sensitized solar cells (DSSCs) by preparing several nickel silicide layers with a 100 nm-Ni/Si (100) structure using silicidation annealing for 30 minutes at 300 ℃ – 900 ℃. X-ray diffraction (XRD), four-point probe, field emission scanning electron microscope (FE-SEM), and cyclic-voltammetry (CV) analyses were carried out to measure the phase, sheet resistance, microstructure, and catalytic activity, respectively. The photovoltaic properties of DSSCs employing nickel silicides were characterized using a solar simulator and a potentiostat. The XRD, four-point probe, and FE-SEM results showed that island-like Ni2Si, uniform NiSi, and NiSi2 were successfully formed under the given silicidation conditions. CV analysis determined that the catalytic activity of the Ni2Si, NiSi, and NiSi2, which exhibited values of 66.58%, 89.69% and 66.07%, respectively, compared to that of Pt catalyst. In particular, the energy conversion efficiency of the DSSC using NiSi was 3.29%.
Keywords: reduction catalyst, nickel silicide, annealing, catalytic activity, cyclic voltammetry
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