4.8 Article

One-pot synthesis of novel ligand-free tin(ii)-based hybrid metal halide perovskite quantum dots with high anti-water stability for solution-processed UVC photodetectors

期刊

NANOSCALE
卷 14, 期 11, 页码 4170-4180

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nr07893c

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资金

  1. projects of the Key R & D Projects of the Ministry of Science and Technology of China [SQ2019YFB220038]
  2. Fundamental Research Funds for the Central Universities [2020CX02002, BITBLR2020013]
  3. Open Foundation of Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University [2021GXYSOF18]

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In this work, ligand-free organic-inorganic hybrid metal halide quantum dots were synthesized and demonstrated high anti-water stability and potential applications for high-performance UVC photodetectors. The experimental results showed that the quantum dots photodetector exhibited excellent responsivity and detectivity under specific conditions, and it had a long lifetime.
Recently, lead-based halide perovskites have gained extensive attention due to their outstanding optoelectronic properties. However, the toxicity of lead would seriously limit its future application. To address these issues, in this work novel ligand-free organic-inorganic hybrid metal halide TBASnCl(3) (C16H36NSnCl3) quantum dots are synthesized by a one-pot method at room temperature, and they showed high anti-water stability and high potential applications for high-performance UVC photodetectors. Our experimental data showed that the responsivity of the lateral photodetectors Au/TBASnCl(3)/Au, in which the active layer (i.e. TBASnCl(3)) was synthesized by further introducing SnF2 as a precursor besides SnCl2, reached 7.3 mA W-1 with a specific detectivity of 1.67 x 10(11) Jones under 0.36 mW cm(-2) 254 nm illumination at -5 V, and it showed a long lifetime even in an environment with an air humidity of 60%. Therefore, it laid a solid foundation for further fabricating lead-free metal halide optoelectronic devices.

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