An Efficient Metal-Free Hydrophilic Carbon as a Counter Electrode for Dye-Sensitized Solar Cells

Abstract EN

This study presents a new cost-effective metal-free counter electrode (CE) for dye-sensitized solar cells (DSSCs).

CE was prepared by doctor blading a hydrophilic carbon (HC) particle on a fluorine-doped tin oxide substrate.

Thereafter, HC CE was characterized using X-ray diffraction, profilometry, four-point probe testing, and cyclic voltammetry.

A 2 µm thick HC CE revealed a comparable catalytic activity to that of the Pt electrode under the same experimental conditions.

DSSC based on HC CE was analyzed and showed J s c of 6.87 mA/cm2 close to that of DSSC with Pt CE (7.0 mA/cm2).

More importantly, DSSC based on HC CE yielded a power conversion efficiency ( η ) of 2.93% under AM 1.5 irradiation (100 mW/cm2), which was comparable to that of DSSC based on standard Pt CE.

These findings suggest that HC CE could be a promising CE for low-cost DSSCs.