压电核壳纳米阵列的构建及换能特性研究

随着压电电子学的发展，压电半导体材料在纳米电子和光电子器件中发挥着越来越重要的作用。有序结构的纳米阵列在体现纳米结构单元集体效应的同时也反映出协同效应、耦合效应等。设计制备具有核壳结构的半导体纳米复合材料可以实现不同材料的功能互补和性能优化。本项目以压电半导体核壳纳米阵列为研究对象，深入开展核壳纳米阵列的制备、异质材料带隙调控特性、载流子输运特性及压电特性等方面的研究，旨在理解核壳纳米阵列的生长机制，探索半导体带隙结构的有效调控方法，明晰核壳纳米结构材料载流子输运机制，实现核壳纳米阵列结构对材料压电特性的调控，最终建立材料结构、带隙结构和压电特性三者之间的内在关联。目标是获得具有高换能效率的新型压电材料。项目研究对于新型核壳纳米阵列材料的设计、应用及评价有重要意义。

With the development of Piezotronics, semiconductor materials play important role in nano-electronic and nano-optoelectronic devices. Due to the ordered structure, the nanoarrays reflect the group effect, the synergistic effect and the coupling effect. The functional complementation and performance optimization of different materials can be realized through the design of core-shell nanostructure. The project is focus on the piezoelectric properties of core-shell nanoarrays. Detail researches about the preparation of core-shell nanoarrays, carrier transport properties, the modulation of bandgap and the piezoelectric property are also carried out. The purposes are to understand the thermodynamic/dynamic growth mechanism, to clarify the carrier transport property, and to realize the modulation of piezoelectric property of core-shell nanoarrays. The objective is to establish the intrinsic relationships among materials structure, band gap and piezoelectric property. The goal is to obtain the novel materials with high energy conversion efficiency. The research is important for the design application and evaluation of novel core-shell nanoarrays.