Abstract

Recently, metal halide perovskites have attracted tremendous attention because of the unprecedented development in the research field of optoelectronic applications. Among the perovskites, all-inorganic halide perovskites (IHPs), especially the cesium lead halide type, show great potential for light-emitting devices because of their excellent optoelectronic properties, such as an ultrahigh photoluminescence quantum yield, high absorption coefficient, and large carrier mobility. Moreover, recent advancements have demonstrated that the extraordinary optical and electrical properties combined with a high chemical stability and facile synthesis make IHPs promising candidates for next-generation high-performance photodetectors (PDs) beyond light-emitting technologies. In this Review, the syntheses of IHPs with different forms, as well as their fundamental optical and electronic properties, are first summarized and compared. Thereafter, we focus on the recent progress of IHP-based PDs working with different wavelengths, covering the infrared, visible, ultraviolet, and gamma regions. Then, the challenges and opportunities facing the field of PDs based on IHPs are discussed. Finally, a brief outlook is given for the future development of IHP-based PDs.

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