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Magnetron Sputtering Route to EfficiencyEnhanced Cu2ZnSnS4 Thin Films as the Counter Electrode of Dye-Sensitized Solar Cells

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High quality Cu2ZnSnS4 and Cu2ZnSn(S, Se)4 (CZTS and CZTSSe) thin films were prepared by a simple two-stage process, in which Cu–Zn–Sn ternary alloy precursor layer was first sputtered on FTO substrate from a single target and then CZTS and CZTSSe thin films were obtained by the subsequent sulfurization and selenization. The as-prepared CZTS and CZTSSe thin films were used as counter electrodes (CEs) in dye-sensitized solar cells (DSSCs). Photovoltaic performances of these cells can be optimized by controlling the thickness and selenization time of both CZTS and CZTSSe thin films. The best power conversion efficiency (PCE) of these films can reach 8.42%, which is comparable to that of Pt CE (8.16%). Cyclic voltammograms (CVs) and electrochemical impedance spectra (EIS) measurements demonstrate that these as-prepared thin films possess outstanding electrocatalytic activity and conductivity, which are ideal CE materials.
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Keywords: COUNTER ELECTRODE; CU–ZN–SN; CZTS; CZTSSE; DSSCS; TWO-STAGE PROCESS

Document Type: Research Article

Publication date: November 1, 2013

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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