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<p>Photodetectors (PDs) based on Sb<sub>2</sub>Se<sub>3</sub> have a high anisotropy ratio and a low responsivity but allow for an efficient response to visible and near-infrared light. Se PD have a moderate anisotropy ratio, excellent photoresponsivity, and quick response in the UV–Visible range. In this work, high-quality Sb<sub>2</sub>Se<sub>3</sub> microbelts (MBs) and Se microtubes (MTs) were synthesized via chemical vapor deposition and integrated into an Sb<sub>2</sub>Se<sub>3</sub>-rGO-Se heterojunction photodetector by drop-casting rGO nanosheets using MXene as electrodes. Incorporating rGO improves charge carrier transport efficiency by creating a graded band structure and expanding the contact region between the Sb<sub>2</sub>Se<sub>3</sub>-MB and Se-MT. Under 0&#xa0;V bias and 806&#xa0;nm, the Sb<sub>2</sub>Se<sub>3</sub>-rGO-Se PD exhibits on/off ratio of 367, responsivity of 37.41&#xa0;mA W<sup>−1</sup>, specific detectivity of 2.15 × 10<sup>11</sup> Jones, anisotropic ratio of 1.69, and response times of 31/39&#xa0;ms, respectively. These values correspond to improvements of 118 times, 2.98 times, 16.54 times, and 1.18 times, respectively, compared to the Sb<sub>2</sub>Se<sub>3</sub>-MB PD (0.4&#xa0;V). The Sb<sub>2</sub>Se<sub>3</sub>-rGO-Se PD exhibits excellent polarization-sensitive properties, as demonstrated by polarization imaging at “JNU”. This confirms that the Sb<sub>2</sub>Se<sub>3</sub>-rGO-Se PD not only shows enhanced optoelectronic performance across various metrics but also demonstrates significant potential for application in polarization imaging.</p>

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Sb2Se3 microbelt-reduced graphene oxide-Se microtube heterojunction for a self-powered UV-NIR broadband photodetector with polarization imaging

  • 期刊论文

  • 发表日期：

    2026年2月27日

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  • Pingping Yu,
  • Pengfan Li,
  • Yuxin Huang,
  • Xuewei Yu,
  • Lin Sun,
  • Yanfeng Jiang

摘要

Photodetectors (PDs) based on Sb2Se3 have a high anisotropy ratio and a low responsivity but allow for an efficient response to visible and near-infrared light. Se PD have a moderate anisotropy ratio, excellent photoresponsivity, and quick response in the UV–Visible range. In this work, high-quality Sb2Se3 microbelts (MBs) and Se microtubes (MTs) were synthesized via chemical vapor deposition and integrated into an Sb2Se3-rGO-Se heterojunction photodetector by drop-casting rGO nanosheets using MXene as electrodes. Incorporating rGO improves charge carrier transport efficiency by creating a graded band structure and expanding the contact region between the Sb2Se3-MB and Se-MT. Under 0 V bias and 806 nm, the Sb2Se3-rGO-Se PD exhibits on/off ratio of 367, responsivity of 37.41 mA W−1, specific detectivity of 2.15 × 1011 Jones, anisotropic ratio of 1.69, and response times of 31/39 ms, respectively. These values correspond to improvements of 118 times, 2.98 times, 16.54 times, and 1.18 times, respectively, compared to the Sb2Se3-MB PD (0.4 V). The Sb2Se3-rGO-Se PD exhibits excellent polarization-sensitive properties, as demonstrated by polarization imaging at “JNU”. This confirms that the Sb2Se3-rGO-Se PD not only shows enhanced optoelectronic performance across various metrics but also demonstrates significant potential for application in polarization imaging.