Tungsten Phosphide Microsheets In‐Situ Grown on Carbon Fiber as Counter Electrode Catalyst for Efficient Dye‐Sensitized Solar Cells

The development of low-cost, green, and pollution-free counter electrode materials with high catalytic activity plays a critical role in improving the photovoltaic performance dye-sensitized solar cells (DSSCs). In recent years, transition metal phosphides have been widely used DSSCs due to their outstanding stability. Herein, novel binary phosphide is immobilized on carbon paper (CP) by two-step strategy. This strategy involves preparation WO3 precursor hydrothermal method, synthesis tungsten (WP) vapor deposition which finally leads uniform dispersion WP paper. acquired WP/CP demonstrates electrical conductivity prefect ability for reducing triiodide, assembled achieve high-power conversion efficiency 10.29%, superior that Pt-based (7.34%). These findings illustrate microsheets in-situ grown are potential candidate replace Pt as an economical efficient DSSCs.