掺杂黑磷晶体的可控生长、物性调控及器件应用研究

二维黑磷晶体具有宽度可调的直接带隙、优异的光、电、力学特性以及独特的强面内各向异性，在电子、光电子器件等领域呈现出广阔的应用前景，然而，环境稳定性差和缺乏有效的生长制备技术严重限制了其实用价值。本项目针对这两大瓶颈问题开展研究，内容包括：采用高温高压技术进行异种元素的可控掺杂提高黑磷晶体环境稳定性，生长大尺度掺杂黑磷晶体和制备物理沉积所需靶材；发展物理沉积方法并结合后续高压处理制备二维黑磷晶态薄膜的技术工艺；阐明掺杂元素与掺杂量对二维黑磷晶体环境稳定性和基本物理特性的调控作用及机制；设计和构造基于二维黑磷晶体的新型异质结构，如二维黑磷-W(Mo)S2、二维黑磷-磁性薄膜、二维黑磷-W(Mo)S2-磁性薄膜等，研究表面与界面效应以及相关的新颖物理特性，构造和发展新型电子、光电子与自旋电子原型器件。本项目的实施可为黑磷在电子、光电子器件等领域的实际应用奠定材料制备与器件应用基础。

Two dimensional black phosphorus (BP) atomic crystal, which has a tunable direct bandgap, excellent optical, electric and mechanical properties and unique strong in-plane anisotropy, exhibits wide application prospects in electronic, optoelectronic devices, etc. However, the practical values of black phosphorus have been severely limited by environmental instability and lack of efficient growth and preparation technology. The present project is designed to be against these two bottlenecks, and the following contents are included: Improve the environmental stability of black phosphorus via controllably doping of heterogeneous elements, Grow and prepare large-size doped BP crystal and targets for physical deposition; Develop the effective growth process for physical deposition of two dimensional BP film; Investigate and clarify the function and mechanism of doped heterogeneous elements and their quantities in regulating the environmental stability and fundamental physical properties of two dimensional BP crystal; Design and construct novel heterogeneous structures based on two dimensional BP crystal, for examples, two dimensional BP crystal-two dimensional W(Mo)S2 crystal, two dimensional BP crystal-magnetic thin film, two dimensional BP crystal- two dimensional W(Mo)S2 crystal -magnetic thin film, etc., Investigate the surface and interface effects and related novel physical properties, Fabricate and develop novel electronic, optoelectronic and spintronic prototype devices. Implementation of the present project will lay the foundations for material and device preparation in the future application of BP in fields of electronics, optoelectronics, etc.