Monolayer hydrophilic MoS2 with strong charge trapping for atomically thin neuromorphic vision systems,Materials Horizons

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Monolayer hydrophilic MoS2 with strong charge trapping for atomically thin neuromorphic vision systems
Materials Horizons ( IF 12.2 ) Pub Date : 2020-10-26 , DOI: 10.1039/d0mh01472a
Yunxia Hu _{1,

2,

3,

4,

5} , Mingjin Dai _{1,

2,

3,

4,

5} , Wei Feng _{4,

6,

7,

8,

9} , Xin Zhang _{2,

3,

4,

5} , Shichao Zhang _{2,

3,

4,

5} , Biying Tan _{2,

3,

4,

5} , Huiming Shang _{2,

3,

4,

5} , Yong Qing Fu _{10,

11,

12,

13} , PingAn Hu _{1,

2,

3,

4,

14}

Affiliation

Effective control of electrical and optoelectronic properties of two-dimensional layered materials, one of the key requirements for applications in advanced optoelectronics with multiple functions, has been hindered by the difficulty of elemental doping, which is commonly utilized in Si technology. In this study, we proposed a new method to synthesize hydrophilic MoS₂ monolayers through covalently introducing hydroxyl groups during their growth process. These hydroxyl groups exhibit a strong capability of charge trapping, and thus the hydrophilic MoS₂ monolayers achieve excellent electrical, optical, and memory properties. Optical memory transistors, made from a single component of monolayer hydrophilic MoS₂, exhibit not only excellent light-dependent and time-dependent photoelectric performance, but also good photo-responsive memory characteristics with over multi-bit storage and more than 10⁴ switching ratios. Atomically thin neuromorphic vision systems (with a concept of proof of 10 × 10 neuromorphic visual image) are manufactured from arrays of hydrophilic MoS₂ optical memory transistors, showing high quality image sensing and memory functions with a high color resolution. These results proved our new concepts to realize image memorization and simplify the pixel matrix preparation process, which is a significant step toward the development of future artificial visual systems.

中文翻译：

具有强电荷捕获功能的单层亲水性MoS2，适用于原子稀薄的神经形态视觉系统

有效地控制二维层状材料的电学和光电性能是元素掺杂的困难，这是在具有多种功能的先进光电子学中应用的关键要求之一，而元素掺杂的困难通常在Si技术中使用。在这项研究中，我们提出了一种通过在其生长过程中共价引入羟基来合成亲水MoS ₂单层的新方法。这些羟基表现出很强的电荷捕获能力，因此亲水性MoS ₂单层具有出色的电，光和存储性能。由单层亲水性MoS ₂的单组分制成的光存储晶体管不仅具有出色的光依赖性和时依赖性光电性能，而且还具有良好的光响应存储特性，具有多位存储和超过10 ^4的开关比。原子薄的神经形态视觉系统（概念证明为10×10神经形态视觉图像）是由亲水性MoS ₂光学存储晶体管阵列制成的，具有高质量的图像感测和具有高色彩分辨率的存储功能。这些结果证明了我们实现图像记忆并简化像素矩阵准备过程的新概念，这是朝着未来人工视觉系统发展的重要一步。

更新日期：2020-11-04

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