Halide Double-Perovskite Semiconductors beyond Photovoltaics

Halide double perovskites, A2MIMIIIX6, offer a vast chemical space for obtaining unexplored materials with exciting properties for a wide range of applications. The photovoltaic performance of halide double perovskites has been limited due to the large and/or indirect bandgap of the presently known materials. However, their applications extend beyond outdoor photovoltaics, as halide double perovskites exhibit properties suitable for memory devices, indoor photovoltaics, X-ray detectors, lightemitting diodes, temperature and humidity sensors, photocatalysts, and many more. This Perspective highlights challenges associated with the synthesis and characterization of halide double perovskites and offers an outlook on the potential use of some of the properties exhibited by this so far underexplored class of materials.

Automated summary

Halide double perovskites, A2MIMIIIX6, offer a wide range of unexplored materials with exciting properties for various applications. The synthesis and characterization of these materials pose challenges. Still, they have potential uses in fields such as energy storage, optoelectronic devices, and sensors, beyond photovoltaics.