Metal halide perovskites are attractive for highly efficient solar cells. As most perovskites
suffer large or indirect bandgap compared with the ideal bandgap range for single‐junction …

Over a short period of approximately 10 years, metal‐halide‐perovskite‐based photovoltaics
have demonstrated unprecedented improvements in solar cell performance beyond the …

The organic-inorganic hybrid Sn-based perovskite has attracted extensive attention because
of its more suitable band gap and environmentally friendly characteristics, but the natural …

The most important obstacle to widespread use of perovskite solar cells is their poor stability
under operational stressors. Here, we systematically monitor the evolution of the …

Ion migration is a notorious phenomenon observed in ionic perovskite materials. It causes
several severe issues in perovskite optoelectronic devices such as instability, current …

Many common crystal structures can be described by a single (or very few) repeated
structural motif (“monomorphous structures”) such as octahedron in cubic halide perovskites …

Mixed halide perovskites that are thermodynamically stable in the dark demix under
illumination. This is problematic for their application in solar cells. We present a unified …

Alloys of ABX3 halide perovskites (HP) exhibit unique phase behavior compared to
traditional III‐V and II‐VI semiconductor alloys used in solar cells. While the latter typically …

Ion migration represents an intrinsic instability of metal halide perovskite solar cells. Here we
show that triple-cation FA x MA y Cs1–x–y PbI3 [FA+=(NH2) 2CH+, MA+= CH3NH3+] active …

Ternary ABX 3 perovskites made of corner-sharing BX 6 octahedra have long featured
prominently in solid-state chemistry and condensed matter physics. Still, the joint …