Hole-conductor-free planar perovskite solar cells with 16.0% efficiency†
Abstract
In the present work, a hole-conductor-free inverted-structure planar perovskite solar cell was fabricated by a solution process. Remarkably, the device showed a power conversion efficiency (PCE) up to 16.0%, which is higher than those of reported hole-conductor-free perovskite solar cells, and even higher than that of devices using NiOx as the hole conductor. Furthermore, the hole-conductor-free device was also found to reveal a very good stability.