石墨烯基底上II-VI族合金纳米棒阵列的制备及光电性能研究

项目名称： 石墨烯基底上II-VI族合金纳米棒阵列的制备及光电性能研究

项目编号： No.21473047

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 分析化学

项目作者： 王敏

作者单位： 合肥工业大学

项目金额： 82万元

中文摘要： 对于一维II-VI族半导体纳米材料的应用来说，实现具有可调且可预定光电性能的纳米器件构筑极为重要。二元II-VI族半导体的合金化即能带工程是一个有效手段。通过当前制备一维II-VI族合金纳米材料的热蒸发方法只能实现成分可调但不可预定，并且很难获得阵列，限制了器件构筑。在本项目中，申请人以ZnSxSe1-x合金纳米棒阵列为例提出一种全新方法：结合聚苯乙烯模板技术，在石墨烯基底上通过蒸镀方法得到具有特定成分比的ZnS和ZnSe异质结纳米棒阵列，再通过退火手段利用外延生长方法获得和异质结成分比相同的ZnSxSe1-x合金纳米棒阵列，并通过改变异质结中两种材料的成分比，最终实现II-VI族合金纳米棒成分和性能的可调且可预定以及阵列构筑。本项目发展的在石墨烯基底上外延生长II-VI族合金纳米棒阵列的策略为实现具有可调且可预定光电性能的一维II-VI族合金纳米材料器件提供了一种有效途径。

中文关键词： II-VI合金；可调且可预定光电性能；纳米棒阵列；石墨烯基底；退火

英文摘要： In terms of the applications for one dimensional (1D) II-VI semiconductors, it is of great importance to fabricate the nanodevices with tunable and predetermined optoelectronic properties. The alloying of the binary II-VI semiconductors, namely energy band engineering, is one kind of effective strategy. 1D alloyed II-VI semiconductors with tunable but non-predetermined compositions can be synthesized via the currently used thermal evaporation method. Moreover, it is still quite difficult to obtain 1D alloyed II-VI arrays through the thermal evaporation approach, which will hamper the nanodevice fabrication based on 1D alloyed II-VI semiconductors. In this proposal, we aim to develop a novel strategy to address this challenge, taking ZnSxSe1-x as an example. First, the ZnS/ZnSe heterostructure nanorod arrays with the fixed ZnS-ZnSe ratio are generated on graphene substrate via e-beam evaporation in the combination with the polystyrene nanosphere lithography. Subsequently, after annealing with the proper conditions, they are expected to turn into single-crystal alloyed ZnSxSe1-x nanorod arrays with the same ZnS-ZnSe ratio as that in ZnS/ZnSe heterostructure, and the composition of alloyed ZnSxSe1-x nanorods can be tuned by changing the ZnS-ZnSe ratio in ZnS/ZnSe heterostructure. That is, the alloyed II-VI nanorod arrays with the tunable and predetermined compositions and properties can be obtained. We believe that this general strategy developed in this proposal will pay a way for fabricating the nanodevice with the tunable and predetermined optoelectronic properties based on 1D alloyed II-VI semiconductors.

英文关键词： alloyed II-VI;tunable and predetermined optoelectronic properties;nanorod arrays;graphene;annealing