Enhanced Structural Stability and Photo Responsiveness of CH3NH3SnI3   Perovskite via Pressure-Induced Amorphization and Recrystallization
  An organic-inorganic halide perovskite of CH3NH3SnI3 with significantly improved structural stability is obtained via pressure-induced amorphization and recrystallization. In situ high-pressure resistance measurements reveal an increased electrical conductivity by 300% in the pressure-treated perovskite. Photocurrent measurements also reveal a substantial enhancement in visible-light responsiveness. The mechanism underlying the enhanced properties is demonstrated to be associated with the improved structural stability. 
Xujie L\"u, Yonggang Wang, Constantinos C. Stoumpos, Qingyang Hu,   Xiaofeng Guo, Haijie Chen, Liuxiang Yang, Jesse S. Smith...
cond-mat.mtrl-sci