Synthesis and Characterization of Graphene Films to Be Used as Transparent Electrode in Solar Cells

Guerrero, Paola Jackeline Sánchez, Campo, Valeria, Benavides, María Esperanza, Beltrán, Tamara, Chiappe, Juan, Carroy, Perrine, Muñoz, Delfina

ISES Solar World Congress 2025 · Fortaleza, Brazil · 2025-11-03
Published by International Solar Energy Society (ISES)

Abstract

This study explores graphene as a potential transparent conductive electrode (TCE) for silicon heterojunction (SHJ) solar cells instead of tin indium oxide (ITO). Graphene films between 1 and 6 cm2 were synthesized by chemical vapor deposition and transferred using a polymer-free wet solution method. Raman spectroscopy, scanning electron microscopy (SEM), and atomic force microscopy (AFM) confirmed the good successful transfer of high-quality graphene, with low roughness and minimal defects. Electrical properties were evaluated by Van der Pauw method and Transfer length method, showing a sheet resistance of 89 Ω/sq for graphene, close to that of ITO (58 Ω/sq). These results suggest that graphene offers a viable alternative to ITO for TCE applications in SHJ solar cells.

Keywords

Graphene, Solar cells, Transparent conductive electrode.

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