色素敏化染料
辅助电极
材料科学
二硫化钼
薄膜
循环伏安法
氧化锡
电极
能量转换效率
铂金
化学工程
太阳能电池
电化学
纳米技术
兴奋剂
光电子学
复合材料
催化作用
化学
有机化学
电解质
物理化学
工程类
作者
Lam Thuy Thi,Viet Hai Le,Ngan Kim Thi Nguyen,Van La Tran Pham,Thu Anh Thi Nguyen,Nguyen Thanh Le Huynh,Hoang Thai Nguyen
摘要
Non-platinum electrodes for photoelectric devices are challenging and attractive to the scientific community. A thin film of molybdenum disulfide (MoS2) was prepared on substrates coated with fluorine-doped tin oxide (FTO) to substitute the platinum counter electrode (CE) for dye-sensitized solar cells (DSSCs). Herein, we synthesized layered and honeycomb-like MoS2 thin films via the cyclic voltammetry (CV) route. Thickness and morphology of the MoS2 thin films were controlled via the concentration of precursor solution. The obtained results showed that MoS2 thin films formed at a low precursor concentration had a layered morphology while a honeycomb-like MoS2 thin film was formed at a high precursor concentration. Both types of MoS2 thin film were composed of 1T and 2H structures and exhibited excellent electrocatalytic activity for the I3-/I- redox couple. DSSCs assembled using these MoS2 CEs showed a maximal power conversion efficiency of 7.33%. The short-circuit value reached 16.3 mA·cm-2, which was higher than that of a conventional Pt/FTO CE (15.3 mA·cm-2). This work reports for the first time the possibility to obtain a honeycomb-like MoS2 thin film morphology by the CV method and investigates the effect of film structure on the electrocatalytic activity and photovoltaic performance of CEs for DSSC application.
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