基于MoS2-水异质结的偏振敏感自驱动热释电光电探测器,Advanced Optical Materials

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基于MoS2-水异质结的偏振敏感自驱动热释电光电探测器
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2024-02-07 , DOI: 10.1002/adom.202302651
Amin Abnavi ₁ , Ribwar Ahmadi ₁ , Hamidreza Ghanbari ₁ , Mirette Fawzy ₂ , Mohammad Reza Mohammadzadeh ₁ , Fahmid Kabir ₁ , Michael M. Adachi ₁

Affiliation

偏振敏感和自驱动热释电光电探测器最近因其在人造电子眼、生物医学成像和光开关方面的潜在应用而引起了人们的兴趣。在此，报道了一种基于光调制诱导的2D MoS ₂晶体表面水分子偏振和去偏振的光电探测器。 MoS ₂ -水异质结光电探测器作为一种自驱动热释光电子器件，可将光诱导的热能转换为电信号，从而产生高达24.6 mA W ^{−1的瞬态光响应度和2.85 × 10}⁸的比探测率琼斯在 470 nm 波长下零偏压。由于在MoS ₂ -水界面处形成内置电场，该结构还具有3.62 A W ^-1的高稳态响应度和3 V偏压下9.18 × 10 ⁸ Jones的探测率，以及快速响应时间约为 0.74 毫秒。此外，由于可见光照射下液态水中氢键网络的重排，MoS ₂ -水光电探测器对光偏振敏感。 MoS ₂ -水结构的简单制造工艺、低成本、偏振敏感性和高性能使其成为液体兼容光电探测器的优秀候选者。

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Polarization-Sensitive and Self-Driven Pyro-Phototronic Photodetectors Based on MoS2-Water Heterojunctions

Polarization-sensitive and self-driven pyroelectric-based photodetectors have recently gained interest due to their potential application in artificial electronic eyes, biomedical imaging, and optical switches. Here, a photodetector based on light modulation-induced polarization and depolarization of water molecules on the surface of a 2D MoS₂ crystal is reported. The MoS₂-water heterostructure photodetector serves as a self-driven pyro-phototronic device that converts light-induced thermal energy to electrical signals, leading to a transient photoresponsivity as high as 24.6 mA W⁻¹ and a specific detectivity of 2.85 × 10⁸ Jones under 470 nm wavelength at zero bias. Due to the formation of a built-in electric field at the MoS₂-water interface, this structure also has a high steady–state responsivity of 3.62 A W⁻¹ and detectivity of 9.18 × 10⁸ Jones at 3 V bias, along with a fast response time of ≈0.74 ms. Moreover, due to the rearrangement of the hydrogen bond network in the liquid water upon visible light illumination, the MoS₂-water photodetector is light polarization-sensitive. The simple fabrication process, low cost, polarization sensitivity, and high performance of the MoS₂-water structure make it an excellent candidate for liquid-compatible photodetectors.

更新日期：2024-02-07

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