【作者】 张健；

【导师】 李春萍；

【作者基本信息】 长春理工大学 ， 凝聚态物理， 2009， 硕士

【摘要】 ZnO是一种直接带隙的半导体材料,室温下能隙宽度3.37 eV,激子束缚能高达60meV,远大于ZnSe(20meV)和GaN(21meV)的激子结合能。如此高的激子束缚能使得激子不易被热激发,从而大大提高了ZnO材料的适用范围。由于其在紫外发光和激光方面具有潜在的应用前景,而成为国际前沿中的研究热点之一。半导体纳米材料由于具有显著的量子效应、表面效应、特殊的电子传导效应等不同与体材料的独特的物理化学性质,纳米ZnO材料的研究引起了人们的广泛的关注。本文主要围绕着ZnO纳米晶的尺寸,结构及纳米球掺杂等条件对其发光性能的影响开展了研究工作,具体的内容如下:(1)利用高质量纳米ZnO颗粒以及Fe掺杂的氧化锌纳米球并通过X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)对其结构进行分析。(2)通过吸收光谱、光致发光谱(PL)测试等手段对所得到的样品进行表征测试。研究纳米氧化锌所表现出的光学性质。(3)研究Fe掺杂浓度为10%的ZnO纳米材料发光特性,分析掺杂Fe对纳米氧化锌材料的光学性质的影响。(4)分析热效应给本论文中纳米ZnO及掺杂样品测试带来的影响。进而分析热效应对光纤放大器、半导体等器件带来的影响。更多还原

【Abstract】 ZnO is a wide band-gap semiconductor(3.37 eV at room temperature) with the high exciton binding energy of 60 meV.This material has attracted extensive interest in the field of electrical and optical devices because of its multi-functionality.Semiconductor one-dimentional(1D) nanostructures have attracted much attention due to their novel properties.This paper was focused on the size of ZnO nano-material、constitute、dopant and their optical properties.The details are as follows:(1) SEM,TEM,XRD were to investigate the structural properties of ZnO nanoparticles and Fe doped ZnO nanoparticles(2) The absorption spectrum and PL spectrum were used to investigate the optical properties of Sample(3) Analysis the influence of dopant Fe to the optical properties of ZnO nanoparticles and optical Properties characteristic of Fe doped ZnO(4) The influence of ZnO,dopant sample,fiber amplifier and semiconductor device caused bv heating effect were also investigated更多还原