Electrochemical Impedance Spectroscopy Analysis of Dye-Sensitized Solar Cells: Understanding Charge Transfer and Device Performance

Navin Bhattarai
Dr. Tim Wiser and Dr. Rasanjali Jayathissa, Faculty Mentors

Dye-sensitized solar cells (DSSCs) are a low-cost solar energy conversion approach that relies on efficient charge transfer. This presentation focuses on Electrochemical Impedance Spectroscopy (EIS) which analyzes how charges flow in DSSCs based on natural dyes from plant sources (e.g., Beetroot and Sumac). EIS tests the impedance across different frequencies, separating resistance and capacitance from electron diffusion, charge transfer, and recombination. The EIS and current-voltage measurements for the DSSCs are then used to link impedance data to power conversion efficiency, revealing how dye properties influence charge transfer resistance. Thus, EIS is a key tool to interpret, compare and understand the charge behavior at different interfaces, supporting the shift toward eco-friendly, plant-based dyes instead of synthetic ones.

Keywords: Dye-sensitized solar cells, Solar energy, Electrochemical Impedance Spectroscopy, Natural dyes, Charge transfer, Sustainable energy

Topic(s):Physics
Chemistry

Presentation Type: Oral Presentation

Session: TBA
Location: TBA
Time: TBA