Overview

• Zhejiang University researchers introduced a volatile ammonium during annealing to drive perovskite phase reconstruction that eliminates low-dimensional inclusions.
• The resulting pure 3D films suppress Auger recombination at room temperature, preserving carrier densities needed for efficient stimulated emission.
• A single-mode VCSEL built from the optimized films achieved a 17.3 μJ/cm² lasing threshold and an approximate quality factor of 3850 under quasi-continuous nanosecond pumping.
• The peer-reviewed results appeared August 19 in Advanced Photonics, with media summaries on August 20–21 from Phys.org and EurekAlert!.
• The team describes a path toward true continuous-wave or electrically driven perovskite lasers, though electrical injection and long-term stability have not yet been demonstrated.