Showcasing research from the Department of Chemical and Biomolecular Engineering at Sogang University, Seoul, Republic of Korea. Title: Graphene-embedded 3D TiO 2 inverse opal electrodes for highly efcient dye-sensitized solar cells: morphological characteristics and photocurrent enhancement Graphene-embedded 3D TiO 2 inverse opal electrodes were fabricated for use in DSSCs. The graphene was incorporated locally into the top layers of the inverse opal structures. We observed that the local arrangement of graphene sheets efectively enhanced electron transport without signifcantly reducing light harvesting by the dye molecules. A high efciency of 7.5% was achieved in DSSCs prepared with these electrodes. As featured in: See Moon et al., Nanoscale, 2013, 5, 4200. www.rsc.org/nanoscale Registered Charity Number 207890