Abstract

The power conversion efficiency of CH3NH3PbX3 (X=I,Br,Cl) perovskite solar cells has been developed rapidly from 6.5 to 20% within 3 years. The anomalous hysteresis found in I−V measurements of perovskite solar cells can cause an inaccurate estimation of the efficiency. We attribute the phenomena to the ferroelectric effect and build a model based on the ferroelectric diode to explain it. We also will demonstrate a novel self-healing behavior under vapor spray of an improved type of perovskite solar cells.

© 2015 Optical Society of America