Enhanced catalytic performance of Cu2ZnSnS4/MoS2 nanocomposites based counter electrode for Pt-free dye-sensitized solar cells

被引：27

作者：

Baskaran, P. ^{[1
]}

Nisha, K. D. ^{[1
]}

Harish, S. ^{[1
]}

Ikeda, H. ^{[2
]}

Archana, J. ^{[1
]}

Navaneethan, M. ^{[1
,3
]}

机构：

[1] SRM Inst Sci & Technol, Dept Phys & Nanotechnol, Funct Mat & Energy Devices Lab, Chennai 603203, Tamil Nadu, India

[2] Shizuoka Univ, Res Inst Elect, Naka Ku, 3-5-1 Johoku, Hamamatsu, Shizuoka 4328011, Japan

[3] SRM Inst Sci & Technol, Nanotechnol Res Ctr, Fac Engn & Technol, Chennai 603203, Tamil Nadu, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 894卷

关键词：

Kesterite structure; Counter electrode; Electrocatalytic activity; Hierarchical structure; DSSC; Cathodic current density; REDUCED GRAPHENE OXIDE; MOLYBDENUM-DISULFIDE; LOW-COST; MOS2; COMPOSITE; FILMS; ELECTROCATALYSTS; NANOCRYSTALS;

D O I：

10.1016/j.jallcom.2021.162166

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Low abundance, high cost and corrosiveness towards the liquid electrolyte is the main limitation of Platinum (Pt) as a counter electrode (CE) in dye-sensitized solar cells (DSSCs) in spite of its excellent electrochemical properties. The present study focuses to enhance the electrochemical properties of CZTS by compositing it with MoS2 towards the replacement of Pt. Pure CZTS, pure MoS2, CZTS/MoS2 nanocomposites are synthesized by hydrothermal method, then characterized and compared to analyze their properties. The outcomes of characterizations techniques from XRD, Raman, XPS, SEM, EDS and TEM confirmed the for-mation of CZTS/MoS2 nanocomposites. The electrochemical characterizations and Impedance analysis of the pure CZTS, pure MoS2 and CZTS/MoS2 are compared. Results showed enhanced catalytic property and lower charge transfer resistance for the CZTS/MoS2 nanocomposites. Nanocomposite with 8 wt% of MoS2 in CZTS exhibited higher carrier concentration of 6.126 x 1018 cm-3, higher mobility of 5.03 cm2Vs-1 and lower resistivity of 2.62 Omega cm compared to CZTS and other nanocomposites. Electrical conductivity and catalytic activity were improved with increase in the wt% of MoS2 in the Cu2ZnSnS4/MoS2 nanocomposites. DSSC device fabricated by interpolating di-tetrabutylammonium cis-bis(isothiocyanate)bis(2,2 ''-bipyridyl- 4,4 ' dicarboxylato) ruthenium (II) (N719) dye-loaded titanium dioxide (commercial P25 TiO2 as photoanode) and with CZMo8 (as CE) using iodine/iodide as a liquid electrolyte exhibited the maximum open circuit voltage of 720 mV, a short circuit current of 8.45 mA/cm2, a fill factor of 0.66, and a power conversion efficiency of 4.07%. (c) 2021 Elsevier B.V. All rights reserved.

引用

页数：9

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