Shallow-level defect passivation by 6H perovskite polytype for highly efficient and stable perovskite …
a, b Steady-state photoluminescence (PL) (a) and transient PL (b) of the control film and the 3 C/6H hetero-polytypic perovskite film.c, d Top (top) and side (bottom) view (c) of (110) surface of ...