By optimizing the transparent rear electrode, we achieved highly efficient single-junction bifacial perovskite solar cells (PSCs). Under concurrent bifacial illumination conditions, we achieved stabilized power outputs of 26.9, 28.5, and 30.1 mW/cm2 under albedos of 0.2, 0.3, and 0.5, respectively—surpassing state-of-the-art monofacial single …