Solar Cells: 3D–2D–0D Interface Profiling for Record Efficiency All‐Inorganic CsPbBrI2 Perovskite Solar Cells with Superior Stability (Adv. Energy Mater. 15/2018)

In article 1703246, Zhiwen Jin, Qian Wang, Shengzhong (Frank) Liu and co-workers design a 3D-2D-0D multi-graded interface based on CsPbBrI2 bulk, NSs, and QDs for CsPbBrI2 perovskite solar cells. Such multi-graded surfaces favorably change the energy level of the CsPbBrI2, which reduced the recombination at the CsPbBrI2/PTAA interface, resulting in a record stabilized PCE of 12.39%, a nearly 20% increase compared with 10.38% for ungraded devices.