| 초록 |
Perovskite solar cells (PSCs) currently show high efficiency for reproduction; the low cost, scalable electron transport layers (ETLs) are becoming important. However, this remains a task for ETLs that show high optical/electrical properties while being a thin film. Here we demonstrate the PSC of a 2D photonic crystal nanodisk (ND) array ETL which enhances light harvesting, even it is compact. Optimal ND arrays show strong forward scattering and optical confinement effects, enhancing light harvesting. We also observe that the ND array improves charge transport by reducing contact resistance. ND array ETL PSCs reach 19% maximum power conversion efficiency, with low photocurrent-voltage hysteresis and stable photo-current output. |
