Flower-Structured 1T Metallic Phase MoS2 As Electrode Materials for Solar Cells

Molybdenum disulfide (MoS₂) layered nanosheets on a fluorine-doped tin oxide (FTO) glass substrate were prepared as a platinum (Pt)-free counter electrode (CE) for dye-sensitized solar cells (DSSCs). It was found that the DSSC with 1T phase MoS₂ as counter electrode exhibited a much higher efficiency than that with 2H phase MoS₂ as counter electrode. The excellent electrocatalytic activity of the 1T phase MoS₂ counter electrode was further demonstrated by cyclic voltammograms, in which the 1T phase MoS₂ showed higher peak current density and lower peak-to-peak separation positions than 2H phase MoS₂.