Jinbiao Jia, Jihuai Wu, Y. Tu
Aug 15, 2015
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Influential Citations
44
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Journal
Journal of Alloys and Compounds
Abstract
Abstract A transparent nickel selenide (Ni 0.85 Se) is prepared by a facile solvothermal reaction and used as an efficient Pt-free counter electrode (CE) for dye-sensitized solar cells (DSSCs). Field emission scanning electron microscopy observes that the as-prepared Ni 0.85 Se possesses porous structure. Cyclic voltammogram measurement indicates that Ni 0.85 Se electrode has larger current density than Pt electrode. Electrochemical impedance spectroscopy shows that the Ni 0.85 Se electrode has lower charge-transfer resistance than Pt electrode. Under simulated solar light irradiation with intensity of 100 mW cm −2 (AM 1.5), the DSSC based on the Ni 0.85 Se CE achieves a power conversion efficiency (PCE) of 8.88%, which is higher than the solar cell based on Pt CE (8.13%). Based on the transparency of Ni 0.85 Se, the DSSC with Ni 0.85 Se/mirror achieves a PCE of 10.19%.