石墨烯基超晶格材料的超长波长光探测研究

项目名称： 石墨烯基超晶格材料的超长波长光探测研究

项目编号： No.51502175

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 朱海鸥

作者单位： 深圳大学

项目金额： 20万元

中文摘要： 扩大光探测器件的有效探测波长范围到中红外甚至更长波段对提高通讯及军事水平有重要意义。本项目拟以石墨烯-过渡金属硫化物超晶格材料为研究对象，设计基于材料结构特点的普适性超薄石墨烯-过渡金属硫化物超晶格的合成方法，研究确定超晶格材料的微观原子结构及电子结构。将石墨烯-过渡金属硫化物薄膜制备成光探测器件，聚焦其光探测行为相关参数的规律，如被探测光波长、强度、频率、薄膜材料厚度及门电压变化情况等与光响应率的关系。研究不同基底材料及基底材料处理方法对光探测性能的影响，对光探测性能进行优化。探索光照射下超晶格材料的特殊能带结构与光致电子-空穴分离过程、光电流增益过程之间的关系，从理论上构建超晶格材料光探测微观物理过程模型。本项目的实施将充分发挥和强化申请人在材料学、固体物理与化学及光学等交叉领域中的研究特色和优势，可望实现具有基于超薄石墨烯-过渡金属硫属化合物超晶格材料的超长波长光探测器的构筑。

中文关键词： 光电特性；纳米技术；石墨烯；二维材料；光电流

英文摘要： To enlarge the wavelength range of photodetector to mid-infrared or even higher range is important for communications or military affairs. In the current project, we choose graphene-transition metal dichalcogenides superlattice as the investigate subject, design universal synthetic routes for the controllable synthesis of ultrathin graphene. Various method will be applied to comfirm the microstructure and the electronic structure of the superlattice. The superlattice will be applied in photodetectors, the influencing factors of the photodetector such as wavelength、intensity、frequency rate of the detected light, as well as the thickness of the superlattice and the voltage of the gate will be studied. Different substrate and treatment method will be compared for optimization of the photodetector.In addition, the relationship of the special band structure of the superlattice and the process of the excitation of electron-hole under light illumination and the photocurrent gain mechanism will be invested, these results will help to give a model of the physical processes. The current project will take advantage of and strengthen the theoretical basis and experience of the proposer on material science, solid state physics and chemistry and optics science, and realize the construction of super-long wavelength photodetector.

英文关键词： photoelectric characteristics;nanotechnology;graphene;two dimensional materials;photocurrent