Halide double perovskites, A₂M^IM^IIIX₆, 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, light-emitting 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.

中文翻译：

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超越光伏的卤化物双钙钛矿半导体

卤化物双钙钛矿，A ₂ M ^I M ^III X ₆，为获得具有令人兴奋的特性的未开发材料提供了广阔的化学空间，适用于广泛的应用。由于目前已知材料的大和/或间接带隙，卤化物双钙钛矿的光伏性能受到限制。然而，它们的应用超出了室外光伏，因为卤化物双钙钛矿表现出适用于存储设备、室内光伏、X 射线探测器、发光二极管、温度和湿度传感器、光催化剂等的特性。本展望重点介绍了与卤化物双钙钛矿的合成和表征相关的挑战，并展望了迄今为止尚未充分开发的一类材料所表现出的一些特性的潜在用途。