Dr. Mike McGehee and colleagues at the University of Colorado Boulder, in collaboration with NREL, have uncovered why perovskite solar cells “melt” under stress.
Their research revealed that microscopic defects such as pinholes and thin spots in the perovskite layer act as weak points where reverse-bias breakdown begins. Using techniques like video thermography, electroluminescence imaging, and microscopy, the team watched these defects heat up and cause localized “melting,” a key reason behind device failure.
The study provides new insight into how perovskite films degrade and outlines a path toward more stable, scalable thin-film devices. By improving film uniformity and reinforcing contact layers, researchers can create perovskite solar cells designed for durability as well as efficiency.
