Focus |

Metal halide perovskites

Perovskite-based photovoltaic devices are making their way from laboratory to market, while progress in the synthesis of colloidal lead-halide perovskite nanocrystals will have impact on a broad range of applications, from displays to single photon emitters. In this Focus issue, we overview recent developments in fundamental and applied research on metal halide perovskite materials, and host a discussion on the open questions regarding the mechanisms leading to the unique behaviour of these materials.

News and Comments

Whether you like exploring the mysteries of light–matter interactions, playing with a versatile chemical platform, or developing the most efficient devices, metal halide perovskites could be the materials for you.

Editorial | | Nature Materials

The ionic conductivity of a halide perovskite can be boosted by light. This may be detrimental for perovskite solar cells, but also holds promise for solid-state photoelectrochemical devices.

News & Views | | Nature Materials

Solar cells based on metal halide perovskites continue to approach their theoretical performance limits thanks to worldwide research efforts. Mastering the materials properties and addressing stability may allow this technology to bring profound transformations to the electric power generation industry.

Comment | | Nature Materials

Claudine Katan, Aditya D. Mohite and Jacky Even discuss the possible impact of various entropy contributions (stochastic structural fluctuations, anharmonicity and lattice softness) on the optoelectronic properties of halide perovskite materials and devices.

Feature | | Nature Materials

Kiyoshi Miyata and X.-Y. Zhu analyse the ferroelectric-like dielectric response of lead halide perovskites in the terahertz region and discuss the potential role of polar nanodomains in accounting for the defect tolerance and low recombination rates of these materials.

Feature | | Nature Materials

Heavy atoms and crystal or inversion symmetry breaking may promote Rashba effects in halide perovskites. Sam Stranks and Paulina Plochocka propose experiments to assess the existence of these effects and their implications on the photophysics of perovskites.

Feature | | Nature Materials

Charge carriers in metal halide perovskites seem to be only marginally affected by defect-related trap states. Filippo De Angelis and Annamaria Petrozza suggest that the key to this behaviour lies in the redox chemistry of halide defects.

Feature | | Nature Materials