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Tao Yang, Ya-peng Zheng, Kuo-Chih Chou, and Xin-mei Hou, Tunable fabrication of single-crystalline CsPbI3 nanobelts and their application as photodetectors, Int. J. Miner. Metall. Mater., 28(2021), No. 6, pp. 1030-1037. https://doi.org/10.1007/s12613-020-2173-2
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Lead halide perovskites have received increasing attention recently as a candidate material in various optoelectronic areas because of their high performance as light absorbers. Herein, we report the growth of CsPbI3 nanobelts via a solution process. A single-crystalline CsPbI3 nanobelt with uniform morphology can be achieved by controlling the amount of PbI2. A single-crystalline CsPbI3 nanobelt possesses a mean width, length, and thickness of 100 nm, 5 µm, and 20 nm, respectively. In this work, photodetectors (PDs) based on individual CsPbI3 nanobelts are constructed and found to perform well with an external quantum efficiency and responsivity of 2.39 × 105% and 770 A/W, respectively. The PDs also show a high detectivity of up to 3.12 × 1012 Jones, which is at par with that of Si PDs. The PDs developed in this work exhibit great promise in various optoelectronic nanodevices.
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