【摘要】：氧化鋅和硫化鋅是重要的直接寬帶隙半導(dǎo)體材料,具有比室溫?zé)崮苓�要高的激子束縛能,是實(shí)現(xiàn)室溫紫外激光發(fā)射的理想材料。一維的氧化鋅和硫化鋅納米材料在紫外光(綠光)發(fā)光(激光)二極管、場(chǎng)效應(yīng)晶體管、太陽(yáng)能電池、納米機(jī)電器件、場(chǎng)發(fā)射以及化學(xué)、生物感應(yīng)器件領(lǐng)域有潛在的應(yīng)用價(jià)值。制備一維氧化鋅或硫化鋅納米材料的方法有很多,如水熱法、電化學(xué)沉積法、化學(xué)氣相沉積法、物理氣相沉積法、金屬有機(jī)化學(xué)氣相沉積法等,而化學(xué)氣相沉積法是使用最廣泛的方法之一。 本文采用化學(xué)氣相沉積法探討了采用不同鋅源制備氧化鋅、硫化鋅及硫化鋅/氧化鋅異質(zhì)結(jié)等納米材料的生長(zhǎng)條件,并討論了影響氧化鋅、硫化鋅納米材料形貌、結(jié)構(gòu)及性能的因素。并利用TEM對(duì)所制備的各種納米材料的結(jié)構(gòu)做了深入的研究。 對(duì)各種氧化鋅、硫化鋅納米材料的產(chǎn)物進(jìn)行了SEM、XRD、TEM、PL表征。在不使用任何催化劑的情況下,在石英載體上分別生長(zhǎng)了氧化鋅的納米線(xiàn)、納米帶和納米梳,在柔性石墨片(FGS)載體上生長(zhǎng)了氧化鋅納米線(xiàn)陣列。氧化鋅的生長(zhǎng)形貌可以通過(guò)反應(yīng)溫度和調(diào)節(jié)氧氣流量進(jìn)行控制。采用碳熱還原,在低溫下生長(zhǎng)了硫化鋅納米線(xiàn),硫化鋅/氧化鋅核/殼型納米線(xiàn),并首次報(bào)導(dǎo)了具有超晶格結(jié)構(gòu)的硫化鋅/氧化鋅異質(zhì)結(jié)納米線(xiàn)和具有氧化鋅3倍周期長(zhǎng)程有序的硫化鋅/氧化鋅雙軸型異質(zhì)結(jié)。氧化鋅納米材料遵循自催化及各向異性的固-氣生長(zhǎng)機(jī)理,硫化鋅納米線(xiàn)則按氣-液-固生長(zhǎng)機(jī)理。光致發(fā)光表征表明所制備的氧化鋅、硫化鋅納米材料都具有良好的綠光發(fā)射性能,同時(shí)氧化鋅納米材料還具有380 nm的紫外光發(fā)射帶。
[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.
【學(xué)位授予單位】：浙江師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類(lèi)號(hào)】：TB383.1

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