Interstitial iodides are the most critical type of defects in perovskite solar cells that limits efficiency and stability. Here, the authors introduce small amount of zinc trifluoromethane sulfonate to control iodide defects, facilitating fabrication of minimodules with efficiencies of over 19%.
- Md Aslam Uddin
- Prem Jyoti Singh Rana
- Jinsong Huang