CAJ | 학술논문

近年来，科研工作者对ZnO纳米材料研究产生了浓厚的兴趣。ZnO是一种具有宽带隙（3.37 eV ）和较大的激子束缚能（60 meV ）的六方纤锌矿结构半导体材料。它具有优异的光电、压电、压敏及发光等特性，在发光（激光）二极管、传感器、发光器件、紫外探测器等领域都有非常好的应用前景。至今，有很多非常成熟的实验方法（包括静电纺丝、水热法、溶胶-水热法、化学气相沉积法、旋涂法及电化学沉积法等）用来合成ZnO纳米材料，如纳米线、纳米棒、纳米盘及量子点等。氧化锌纳米结构的制备和性质已得到了广泛的研究，Z n O的可见发光机理一直是研究的热点，但很少有人对可见光范围内的光致发光进行总结。光致发光光谱能反映一些重要信息，如表面缺陷和氧空位、半导体材料的表面状态、光诱导电荷转移过程等。有学者认为ZnO的发光机理与其晶体缺陷有关，还有研究者认为其发光机理与氧空位有关等。通过量子限域效应、带边调制、表面修饰方法、缺陷调控方法等方面综述了ZnO可见区发光机理。
근년래，과연공작자대ZnO납미재료연구산생료농후적흥취。ZnO시일충구유관대극（3.37 eV ）화교대적격자속박능（60 meV ）적륙방섬자광결구반도체재료。타구유우이적광전、압전、압민급발광등특성，재발광（격광）이겁관、전감기、발광기건、자외탐측기등영역도유비상호적응용전경。지금，유흔다비상성숙적실험방법（포괄정전방사、수열법、용효-수열법、화학기상침적법、선도법급전화학침적법등）용래합성ZnO납미재료，여납미선、납미봉、납미반급양자점등。양화자납미결구적제비화성질이득도료엄범적연구，Z n O적가견발광궤리일직시연구적열점，단흔소유인대가견광범위내적광치발광진행총결。광치발광광보능반영일사중요신식，여표면결함화양공위、반도체재료적표면상태、광유도전하전이과정등。유학자인위ZnO적발광궤리여기정체결함유관，환유연구자인위기발광궤리여양공위유관등。통과양자한역효응、대변조제、표면수식방법、결함조공방법등방면종술료ZnO가견구발광궤리。
In the past few years we have witnessed a revival of ,and subsequent rapid expansion in ,the research on zinc oxide (ZnO) .We present a review of current research on the optical properties of ZnO .The wide range of useful properties displayed by ZnO has been recognized for a long time .The high electron mobility ,high thermal conductivity ,wide and direct band gap and large exciton binding energy make ZnO suitable for a wide range of devices ,including two light-emitting tubes ,transparent thin- <br> film transistors ,laser diodes that operate in the blue and ultraviolet region of the spectrum ,and ultraviolet detector .Optically pumped lasing has been reported in ZnO platelets , ZnO thin films , and clusters consisting of ZnO nanocrystals and ZnO nanowires .Up to now ,a number of synthetic methods including electrospinning ,hydrothermal ,sol-hydrothermal ,chemical vapor deposition ,spin coating and electrochemical deposition have been used to prepare ZnO nanomaterials such as nanofibers , nanowires ,nanorods and so on .The growth and properties of ZnO nanostructures have been extensively studied ,but the photo-luminescence mechanism in the visible range has seldom been summarized . The photoluminescence spectra can reflect some important information such as surface defects and oxygen vacancies ,surface states ,photo-induced charge carrier separation and recombination processes in nano-sized semiconductor materials .The optical emission of ZnO is equally complex ,with a variety of defect emission states whose structural origins remain controversial .A detailed discussion of photoluminescence ,in the visible spectral range ,is provided .In this review ,we provided a detailed overview on the luminescence mechanism of ZnO nanostruc-tures in the visible range .The review detail exhibits the following four mechanisms of the optical properties of ZnO in the visible range:the influence of the quantum confinement effect ,the band edge modulation that has effect of photoluminescence ,the influence of surface modification ,and the control of defects’ concentration .