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<p>In this work, SnO<sub>2</sub>/Zn<sub>2</sub>SnO<sub>4</sub> composites were synthesized by a simple one-step hydrothermal method to construct a high-performance self-powered UV photodetector. SnO<sub>2</sub> nanoneedles are distributed on the surface of Zn<sub>2</sub>SnO<sub>4</sub> nanosheets, and they show well-formed heterointerface and type-II band structure. Compared with pure Zn<sub>2</sub>SnO<sub>4</sub>, SnO<sub>2</sub>/Zn<sub>2</sub>SnO<sub>4</sub> composites display the relatively higher UV light absorbance and charge transfer capability. Under UV illumination, the photodetectors based on SnO<sub>2</sub>/Zn<sub>2</sub>SnO<sub>4</sub> composites and ITO conductive electrode display stable and repeatable self-powered characteristics. With an optimal Zn:Sn molar ratio of 1:1 in the reactants, ZS11 based photodetector shows the highest detectivity of 3.96 × 10<sup>11</sup> Jones, which is ascribed to the morphology and energy band regulations of Zn<sub>2</sub>SnO<sub>4</sub> by SnO<sub>2</sub>.</p>

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High-performance self-powered UV photodetector based on SnO2/Zn2SnO4 composites from one-step hydrothermal synthesis

  • 期刊论文

  • 发表日期：

    2025年8月25日

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  • Furui Li,
  • Songchi Liao,
  • Junyu Su,
  • Bowen Li,
  • Huan He,
  • Yuechun Fu

摘要

In this work, SnO2/Zn2SnO4 composites were synthesized by a simple one-step hydrothermal method to construct a high-performance self-powered UV photodetector. SnO2 nanoneedles are distributed on the surface of Zn2SnO4 nanosheets, and they show well-formed heterointerface and type-II band structure. Compared with pure Zn2SnO4, SnO2/Zn2SnO4 composites display the relatively higher UV light absorbance and charge transfer capability. Under UV illumination, the photodetectors based on SnO2/Zn2SnO4 composites and ITO conductive electrode display stable and repeatable self-powered characteristics. With an optimal Zn:Sn molar ratio of 1:1 in the reactants, ZS11 based photodetector shows the highest detectivity of 3.96 × 1011 Jones, which is ascribed to the morphology and energy band regulations of Zn2SnO4 by SnO2.