Trapped charge-driven degradation of perovskite solar cells

Perovskite solar cells have shown unprecedent performance increase up to 22% efficiency. However, their photovoltaic performance has shown fast deterioration under light illumination in the presence of humid air even with encapulation. The stability of perovskite materials has been unsolved and its mechanism has been elusive. Here we uncover a mechanism for irreversible degradation of perovskite materials in which trapped charges, regardless of the polarity, play a decisive role. An experimental setup using different polarity ions revealed that the moisture-induced irreversible dissociation of perovskite materials is triggered by charges trapped along grain boundaries. We also identified the synergetic effect…

• NR
  National Research Foundation

  Awards: 2011-0031577, 2011-0031561
• MO
  Ministry of Science, ICT and Future Planning

  Awards: 2011-0031561, NRF-2016M3A7B4909581, 2011-0031577, 2016M3A7B4909581
• NR
  National Research Foundation of Korea

  Awards: 2016M3A7B4909581, 2011-0031561, 2011-0031577
• MO
  Ministry of Education, Science and Technology

  Award: 2011-0031561