纳米氧化锌和硫化锌的气相沉积法制备及性能研究
发布时间：2019-01-28 10:01
【摘要】：氧化锌和硫化锌是重要的直接宽带隙半导体材料,具有比室温热能还要高的激子束缚能,是实现室温紫外激光发射的理想材料。一维的氧化锌和硫化锌纳米材料在紫外光(绿光)发光(激光)二极管、场效应晶体管、太阳能电池、纳米机电器件、场发射以及化学、生物感应器件领域有潜在的应用价值。制备一维氧化锌或硫化锌纳米材料的方法有很多,如水热法、电化学沉积法、化学气相沉积法、物理气相沉积法、金属有机化学气相沉积法等,而化学气相沉积法是使用最广泛的方法之一。 本文采用化学气相沉积法探讨了采用不同锌源制备氧化锌、硫化锌及硫化锌/氧化锌异质结等纳米材料的生长条件,并讨论了影响氧化锌、硫化锌纳米材料形貌、结构及性能的因素。并利用TEM对所制备的各种纳米材料的结构做了深入的研究。 对各种氧化锌、硫化锌纳米材料的产物进行了SEM、XRD、TEM、PL表征。在不使用任何催化剂的情况下,在石英载体上分别生长了氧化锌的纳米线、纳米带和纳米梳,在柔性石墨片(FGS)载体上生长了氧化锌纳米线阵列。氧化锌的生长形貌可以通过反应温度和调节氧气流量进行控制。采用碳热还原,在低温下生长了硫化锌纳米线,硫化锌/氧化锌核/壳型纳米线,并首次报导了具有超晶格结构的硫化锌/氧化锌异质结纳米线和具有氧化锌3倍周期长程有序的硫化锌/氧化锌双轴型异质结。氧化锌纳米材料遵循自催化及各向异性的固-气生长机理,硫化锌纳米线则按气-液-固生长机理。光致发光表征表明所制备的氧化锌、硫化锌纳米材料都具有良好的绿光发射性能,同时氧化锌纳米材料还具有380 nm的紫外光发射带。
[Abstract]:Zinc oxide and zinc sulfide are important direct wide band gap semiconductor materials with higher exciton binding energy than room temperature thermal energy. They are ideal materials for realizing UV laser emission at room temperature. One-dimensional zinc oxide and zinc sulfide nanomaterials have potential applications in the fields of ultraviolet (green) luminescent (laser) diodes, field effect transistors, solar cells, nano-electromechanical devices, field emission and chemical and biological sensors. There are many methods for preparing one-dimensional zinc oxide or zinc sulfide nanomaterials, such as hydrothermal method, electrochemical deposition method, chemical vapor deposition method, physical vapor deposition method, metal-organic chemical vapor deposition method, etc. Chemical vapor deposition is one of the most widely used methods. In this paper, the growth conditions of zinc oxide, zinc sulfide and zinc sulfide / zinc oxide heterojunction were investigated by chemical vapor deposition, and the morphology of zinc oxide and zinc sulfide nanomaterials were also discussed. Structure and performance factors. The structure of various nanomaterials was studied by TEM. The products of zinc oxide and zinc sulfide nanomaterials were characterized by SEM,XRD,TEM,PL. ZnO nanowires and nanowires were grown on quartz supports without any catalyst and ZnO nanowires arrays were grown on flexible graphite (FGS) supports. The growth morphology of ZnO can be controlled by reaction temperature and adjusting oxygen flow rate. Zinc sulfide nanowires were grown by carbothermal reduction at low temperature, and zinc sulfide / zinc oxide core / shell nanowires were prepared. The nanowires of zinc sulfide / zinc oxide heterojunction with superlattice structure and the biaxial zinc sulfide / zinc oxide heterojunction with 3 times period order of zinc oxide are reported for the first time. ZnO nanomaterials follow the mechanism of autocatalytic and anisotropic solid-gas growth while ZnO nanowires follow the gas-liquid-solid growth mechanism. Photoluminescence characterization showed that the prepared ZnO and ZnS nanomaterials had good green emission properties, and ZnO nanomaterials also had UV emission bands of 380 nm.
【学位授予单位】：浙江师范大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TB383.1
本文编号：2416959
[Abstract]:Zinc oxide and zinc sulfide are important direct wide band gap semiconductor materials with higher exciton binding energy than room temperature thermal energy. They are ideal materials for realizing UV laser emission at room temperature. One-dimensional zinc oxide and zinc sulfide nanomaterials have potential applications in the fields of ultraviolet (green) luminescent (laser) diodes, field effect transistors, solar cells, nano-electromechanical devices, field emission and chemical and biological sensors. There are many methods for preparing one-dimensional zinc oxide or zinc sulfide nanomaterials, such as hydrothermal method, electrochemical deposition method, chemical vapor deposition method, physical vapor deposition method, metal-organic chemical vapor deposition method, etc. Chemical vapor deposition is one of the most widely used methods. In this paper, the growth conditions of zinc oxide, zinc sulfide and zinc sulfide / zinc oxide heterojunction were investigated by chemical vapor deposition, and the morphology of zinc oxide and zinc sulfide nanomaterials were also discussed. Structure and performance factors. The structure of various nanomaterials was studied by TEM. The products of zinc oxide and zinc sulfide nanomaterials were characterized by SEM,XRD,TEM,PL. ZnO nanowires and nanowires were grown on quartz supports without any catalyst and ZnO nanowires arrays were grown on flexible graphite (FGS) supports. The growth morphology of ZnO can be controlled by reaction temperature and adjusting oxygen flow rate. Zinc sulfide nanowires were grown by carbothermal reduction at low temperature, and zinc sulfide / zinc oxide core / shell nanowires were prepared. The nanowires of zinc sulfide / zinc oxide heterojunction with superlattice structure and the biaxial zinc sulfide / zinc oxide heterojunction with 3 times period order of zinc oxide are reported for the first time. ZnO nanomaterials follow the mechanism of autocatalytic and anisotropic solid-gas growth while ZnO nanowires follow the gas-liquid-solid growth mechanism. Photoluminescence characterization showed that the prepared ZnO and ZnS nanomaterials had good green emission properties, and ZnO nanomaterials also had UV emission bands of 380 nm.
【学位授予单位】：浙江师范大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TB383.1
【参考文献】
相关期刊论文 前1条
1 郑燕青,施尔畏,李汶军,王步国,胡行方;晶体生长理论研究现状与发展[J];无机材料学报;1999年03期
，本文编号：2416959
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