Rapid progress in the efficiency of hybrid lead halide perovskite photovoltaics surpassed the
semiconductor thin-film solar cells such as CdTe (cadmium telluride), CZTS (copper zinc tin …

Semiconductors in all dimensionalities ranging from 0D quantum dots and molecules to 3D
bulk crystals support bound electron–hole pair quasiparticles termed excitons. Over the past …

Mixed cation perovskites have improved stability, but cation alloying enables the formation
of separated phases, as well as leading to new decomposition pathways. Here, using …

Two-dimensional (2D) perovskites assembled with hydrophobic bulky organic cations
demonstrate much enhanced ambient stability and anisotropic carrier transport, making their …

The adoption of new thin-film materials in high-end technologies, such as monolithic tandem
solar cells and integrated circuits, demands fabrication processes that allow a high level of …

The structural stability of the metal halide perovskite (MHP) absorber material is crucial for
the long-term solar cell stability in this thin-film photovoltaic technology. Here, we use mixed …

Direct visualization and quantitative evaluation of charge filling in grain boundary (GB) traps
of hybrid metal halide perovskites require dynamic conductivity imaging simultaneously at …

Ultrafast infrared nano-imaging has demonstrated access to ultrafast carrier dynamics on the
nanoscale in semiconductor, correlated-electron, or polaritonic materials. However, mostly …

In high fluence applications of lead halide perovskites for light-emitting diodes and lasers,
multi-polaron interactions and associated Auger recombination limit the device performance …

Perovskite films prepared using the low-temperature solution method show plentiful defects,
especially at grain boundaries and on the surface. A few additives have been exploited to …