| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1608933 | Journal of Alloys and Compounds | 2015 | 5 Pages |
•A transparent Ni0.85Se is prepared by a facile solvothermal reaction.•Ni0.85Se electrode has better electrocatalytic activity than Pt electrode.•DSSC with Ni0.85Se electrode obtains efficiency of 8.88%, higher than DSSC with Pt.•DSSC with Ni0.85Se/mirror electrode achieves an efficiency of 10.19%.
A transparent nickel selenide (Ni0.85Se) 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 Ni0.85Se possesses porous structure. Cyclic voltammogram measurement indicates that Ni0.85Se electrode has larger current density than Pt electrode. Electrochemical impedance spectroscopy shows that the Ni0.85Se 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 Ni0.85Se 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 Ni0.85Se, the DSSC with Ni0.85Se/mirror achieves a PCE of 10.19%.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide
