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In article number 1803422, Wenjing Zhang, Feng Gao, and co‐workers present photodetectors based on all‐inorganic metal halide perovskite (CsPbIxBr3−x), which have a vertical p–i–n structure. The obtained photodetectors have high sensitivity, fast response, and good long‐term stability. The application of the resulting photodetectors is also demonstrated in an optical‐communication system that can...
Photodetectors are critical parts of an optical communication system for achieving efficient photoelectronic conversion of signals, and the response speed directly determines the bandwidth of the whole system. Metal halide perovskites, an emerging class of low‐cost solution‐processed semiconductors, exhibiting strong optical absorption, low trap states, and high carrier mobility, are widely investigated...
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