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Abstract
Real-time, accurate, and portable detection of wireless signal is a crucial part of mobile communication. A highly sensitive detector with quickly response is the indispensable component for obtaining optical signal. Organic/inorganic hybrid perovskite (CH3NH3PbI3) has been fabricated to photodetectors with a rapid response time and high responsivity by optimizing the quality of photosensitive layer with appropriate transport layer. The devices show high responsivity of 436 mA W−1 at 753 nm, fast response time of 1.7 μs, large linear dynamic range of 106 dB, as well as 75 kHz bandwidth, all under zero bias. Attributing to these prominent characteristics, this perovskite photodetector was integrated into an optical communication system, serving as a light sensor in receiver terminal. With it, the string, text and data files are transmitted by coded light successfully, accurately and rapidly. These results show the great potential of applications in visible light detection for organic/inorganic hybrid perovskite junction photodetectors.
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