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Flexible, UV-responsive perovskite photodetectors with low driving voltage

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Abstract

Although lead halide perovskites with tunable band gaps are widely used for photodetection in the visible spectrum, very few studies have been focused on the use of perovskites in ultraviolet detection. Here, we report that MAPbI3−xClx-based photodetectors (PDs) show a response in the ultraviolet spectrum as well as yield very fast photoresponse speed (< 80 µs/90 µs) and excellent detectivity (1012 Jones with 365 nm lamp) with very low driving voltage (0.3 V). The results demonstrate the enhancement of photoelectric performance of the PDs in the ultraviolet spectrum is because the doping of Cl in MAPbI3 increases the bandgap and the crystalline grain size of MAPbI3−xClx film. Moreover, 10%PbCl2-MAPbI3−xClx-based flexible photodetectors displays remarkable mechanical flexibility.

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Acknowledgements

This work was supported by National Natural Science Foundation of China under Grant Nos. 61421002, 61474015, 61574029 and 61471085. This work was also partially supported by University of Kentucky.

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Authors and Affiliations

  1. School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China

    Hao Li, Dandan Yang, Ting Zhang, Peng Zhang, Feng Wang, Chaojie Qin, Ruihan Yang & Shibin Li

  2. Department of Electrical and Computer Engineering and Center for Nanoscale Science and Engineering, University of Kentucky, Lexington, KY, 40506, USA

    Zhi David Chen

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  1. Hao Li
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  2. Dandan Yang
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  3. Ting Zhang
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  4. Peng Zhang
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  5. Feng Wang
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Contributions

HL, DY and TZ designed experiments and carried out the measurements. PZ, FW, CQ and RY participated in the work to analyze the data and prepared the manuscript initially. SL and ZC gave equipment support. All authors read and approved the final manuscript.

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Correspondence to Shibin Li.

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Li, H., Yang, D., Zhang, T. et al. Flexible, UV-responsive perovskite photodetectors with low driving voltage. J Mater Sci 54, 11556–11563 (2019). https://doi.org/10.1007/s10853-019-03721-3

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