Synthesis CZTS/CZTSe as low-cost counter electrodes for dye-sensitized solar cells

• Main Authors: KO CHIH-YEH, 柯志業
• Other Authors: 段葉芳
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/5azu9q

碩士 === 國立臺北科技大學 === 化學工程研究所 === 103 === Cu2ZnSnS4 (CZTS) and Cu2ZnSnSe4 (CZTSe), have many advantages as counter electrode. Such as the abundances of their constituting elements, low cost and low toxicity. In this work, we use solvothermal method to synthesize the CZTS/CZTSe nanoparticles, and characterize by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and Raman spectroscopy. Typically, the photoanode use TiO2 with photosensitize dye N-719, the liquid electrolyte is I-/I3- electrochemical system. In comparison, Pt counter electrode is used and prepared by Sputter deposition. In addition, we changed the reaction steps and conditions, to synthesize CZTSe nanotubes. We expected it can promote the electrocatalytic activity and increase the cell efficiency. The results showed that the efficiency of Pt was 3.79%、 CZTSe was 2.79%. The efficiency of CZTSe still lower than Pt. However Pt is a noble metal. Therefore, CZTSe can be potentially used as a counter electrode material for DSSCs.