The surface, interfaces and grain boundaries of a halide perovskite film carry critical tasks in
achieving as well as maintaining high solar cell performance due to the inherently defective …

It is widely believed that excess/residual lead iodide (PbI2) can affect the performance of
perovskite solar cells. Moderate PbI2 can enhance efficiency by passivating defects, while …

In halide perovskite solar cells the formation of secondary-phase excess lead iodide (PbI2)
has some positive effects on power conversion efficiency (PCE) but can be detrimental to …

Metallic lead (Pb 0) impurities in metal-halide perovskites have attracted tremendous
research concerns owing to their detrimental effects on perovskite solar cells (PSCs) …

The benefits of excess PbI2 on perovskite crystal nucleation and growth are countered by
the photoinstability of interfacial PbI2 in perovskite solar cells (PSCs). Here we report a …

Sufficient lead iodide (PbI2) in perovskite films effectively passivates defects and enhances
device performance. However, excess large-grained PbI2 clusters tend to be randomly …

Surface passivation is an effective way to boost the efficiency and stability of perovskite solar
cells (PSCs). However, a key challenge faced by most of the passivation strategies is …

Solar cells based on metal halide perovskites have reached a power conversion efficiency
as high as 25%. Their booming efficiency, feasible processability, and good compatibility …

Excess PbI2 in perovskite film is an effective strategy for boosting perovskite solar cells
(PSCs) performance. However, the presence of unreacted PbI2 is a critical source of intrinsic …

Abstract α‐Formamidinium lead triiodide (α‐FAPbI3) represents the state‐of‐the‐art for
perovskite solar cells (PSCs) but experiences intrinsic thermally induced tensile strain due to …