氧化锌薄膜研究进展

本文介绍了制备ＺｎＯ薄膜的常见方法和影响薄膜结构的主要因素，并已在Ｓｉ衬底上利用直流反应磁控溅央求地制备出Ｃ轴取向高度一致的ＺｎＯ薄膜。     

纳米氧化锌薄膜的特性及研究进展

纳米氧化锌薄膜是一种新型的宽禁带直接带隙半导体材料,激子结合能较高,具有很高的热稳定性和较好的化学稳定性,晶格和光电性能优异,在各类电子和短波光学器件方面应用广泛,因此成为了国内外的研究热点。文章重在阐述其发光特性和研究现状,并展望其发展前景。     

Zn缓冲层对氧化锌薄膜的结构和光学特性的影响

采用射频磁控溅射法在玻璃衬底上制备了具有高c轴择优取向的不同Zn缓冲层厚度的ZnO(ZnO/Zn)薄膜。利用X射线衍射(XRD)法、扫描电子显微镜(SEM)技术和光致荧光(PL)发光谱(PL)等表征了ZnO/Zn薄膜的微观结构和发光特性。XRD的分析结果显示,随着缓冲层厚度的增加,(002)衍射峰的半高宽(FWHM)逐渐变小,表明薄膜的结晶质量得到改善。通过对样品PL谱的研究,发现分别位于435(2.85eV)和480nm(2.55eV)的蓝光双峰以及530nm(2.34eV)的绿光峰,且缓冲层沉积时间为10min时,样品的单色性最好。推测位于435nm的蓝光发射主要来源于电子从锌填隙缺陷能级到价带顶的跃迁所致,而绿光峰的发光机制与氧空位有关。     

磁控溅射法制备掺杂ZnO透明导电薄膜及其研究进展

磁控溅射技术以其显著的优点已成为工业镀膜主要技术之一。充分发挥磁控溅射镀膜技术的现有优势,寻找新的增长点,成为近年来人们研究的热点。介绍了磁控溅射镀膜技术的原理、特点;总结了近来磁控溅射法制备掺杂ZnO薄膜,主要是Al掺杂、Si掺杂、Al-H共掺杂ZnO薄膜的研究进展。并在此基础上对掺杂ZnO透明导电薄膜的发展趋势进行了展望。     

AlN/Si衬底上ZnO薄膜的择优取向生长

当ZnO薄膜直接沉积在Si衬底上时,由于ZnO与Si的晶格失配度大,不易于获得高质量的ZnO薄膜.因此,选择合适的衬底材料沉积ZnO薄膜,对提高其质量非常重要.本文采用射频磁控溅射法,通过在Si(100)衬底上预沉积AlN作为ZnO薄膜生长的缓冲层,获得了择优取向的ZnO薄膜.我们还讨论了ZnO薄膜在AlN/Si衬底上的取向生长机理.     

不同衬底上ZnO薄膜的射频磁控溅射制备及结构

利用射频磁控溅射镀膜的方法,在c面蓝宝石、石英玻璃和载破片衬底上成功制备了ZnO薄膜。用x射线衍射和扫描电子显微镜进行了结构分析并观察了样品的表面形貌。结果表明：制备的ZnO薄膜具有良好的C轴择优取向结晶度,并在石英玻璃和载玻片衬底上的ZnO薄膜表面发现了[101]取向的“米粒状”晶粒。     

磁控溅射制备大面积ZnO薄膜性能的研究

通过磁控溅射氧化锌陶瓷靶材的方法在玻璃基片上制备ZnO薄膜,研究了溅射功率、溅射气压以及基片温度对ZnO薄膜相结构、禁带宽度及光学性能的影响.使用X射线衍射仪(XRD)分析了薄膜相结构,使用台阶仪测试薄膜厚度,采用薄膜测试仪测试薄膜的透过率,采用扫描电镜(SEM)观察薄膜表面形貌.结果表明:不同制备条件下均形成具有(0...     

氧化锌薄膜研究的新进展

ZnO薄膜是一种具有优良的压电、光电、气敏、压敏等性质的材料.ZnO薄膜的制备方法多样,薄膜的性质取决于不同的掺杂组分,并与制备工艺紧密相关.简述了ZnO薄膜的制备方法与基本性质与应用,分析了ZnO薄膜研究、应用与开发现状,展望了产业化发展前景.     

氧化锌薄膜制备技术的评价

详细介绍了各种制备氧化锌薄膜的方法，包括磁控溅射法、化学气相沉积法、喷雾热解法、溶胶凝胶法、激光脉冲沉积法、分子束外延法、原子层外延生长法。阐述了这些方法的机理、沉积条件、所需的反应物以及制得的薄膜的性质。讨论并比较了各种方法的优缺点和应用于器件及工业生产的可能性。     

ZnO薄膜生长技术的最新研究进展

ZnO是一种新型的Ⅱ-Ⅳ族半导体材料，目前已研究了开发了许多ZnO薄膜的生长技术，其中，磁控溅射，喷雾热分解，分子束外延，激光脉冲沉积，金属有机物化学气相外延等沉积技术得到了有效应用；而一些新的工艺方法，如溶胶－凝胶，原子层外延，化学浴沉积，离子吸附成膜，离子束辅助沉积，薄膜氧化等也进行了深入研究，详细阐述了ZnO薄膜生长技术的最新研究进展。     

新型透明导电ZnO:Mo薄膜

采用直流磁控反应溅射技术成功制备了新型ZnOMo(ZMO)透明导电薄膜.研究了钼掺杂量和基片温度等参数对ZMO薄膜结构和光电性能的影响.结果表明,薄膜的结构和光电性能与钼含量以及基片温度有关.x光衍射图谱(XRD)显示薄膜具有六角纤锌矿结构,并且在基片温度为200℃,钼含量(Mo/Zn Mo)为1.5wt%时薄膜具有较好的c轴取向.制备出的ZMO薄膜最低电阻率为1.97×10-3 Ω·cm,相应载流子迁移率达37.0 cm2V-1s-1,载流子浓度为8.57×1019 cm-3,在可见光区域的平均透射率达到80%左右.     

氧化锌薄膜制备技术的评价

详细介绍了各种制备氧化锌薄膜的方法 ,包括磁控溅射法、化学气相沉积法、喷雾热解法、溶胶凝胶法、激光脉冲沉积法、分子束外延法、原子层外延生长法。阐述了这些方法的机理、沉积条件、所需的反应物以及制得的薄膜的性质。讨论并比较了各种方法的优缺点和应用于器件及工业生产的可能性     

ZnO薄膜及其性能研究进展

ＺｎＯ薄膜是一种具有优良的压电、光电、气敏、压敏等性质的材料,在透明导体、发光元件、太阳能电池窗口材料、光波导器、单色场发射显示器材料、高频压电转换器、表面声波元件、微传感器以及低压压敏电阻器等方面具有广泛的用途．ＺｎＯ 薄膜的制备方法多样,各具优缺点;而薄膜性质的差异则取决于不同的掺杂组分,并与制备工艺紧密相关．本文综述了ＺｎＯ薄膜的制备及性质特征,并对其发展趋势及前景进行了探讨．     

Realization of phosphorus-doped p-type ZnO thin films via diffusion and thermal activation

ZnO thin films were initially deposited on a heavily phosphorus-doped Si (n⁺-Si) substrate by radio frequency magnetron sputtering. The transition from n-type ZnO to p-type one was realized by phosphorus diffusing from Si substrate to ZnO film and being thermally activated during post annealing. Crystal structures of the ZnO films were confirmed to be highly c-axis oriented wurtzite structure by X-ray diffraction experiment. Photoluminescence spectra of the ZnO films showed strong ultraviolet emissions originated from the recombination of the band-edge excitons. The composition of the films was measured by X-ray photoelectron spectroscopy, and a typical concentration of phosphorus was about 0.48% corresponding to the order of atomic density of 10¹⁹/cm³. The hole concentration of the film was + 1.28 × 10¹⁹/cm³ measured by Hall effect apparatus. Formation of the p-type ZnO films can be further confirmed by the rectifying I-V curves of p-ZnO/n⁺-Si heterojunctions.     

Influence of working pressure on ZnO:Al films from tube targets for silicon thin film solar cells

Mid-frequency magnetron sputtering of aluminum doped zinc oxide films (ZnO:Al) from tube ceramic targets has been investigated for silicon based thin film solar cell applications. The influence of working pressure on structural, electrical, and optical properties of sputtered ZnO:Al films was studied. ZnO:Al thin films with a minimum resistivity of 3.4 × 10⁻⁴ Ω cm, high mobility of 50 cm²/Vs, and high optical transmission close to 90% in visible spectrum region were achieved. The surface texture of ZnO:Al films after a chemical etching step was investigated. A gradual increase in feature sizes (diameter and depth) was observed with increasing sputter pressure. Silicon based thin film solar cells were prepared using the etched ZnO:Al films as front contacts. Energy conversion efficiencies of up to 10.2% were obtained for amorphous/microcrystalline silicon tandem solar cells.     

用光声技术测量ZnO薄膜的压电系数

本文报导了用光声技术测量溅射 ZnO 薄膜的压电系数,介绍了用来测量 ZnO 薄膜压电系数的理论分析和实验方法。本实验所得压电系数 e_(33)、e_(31)的值分别为0.817C/m~2和-0.431C/m~2,与 ZnO 单晶的值相比是合理的。     

Tungsten-doped ZnO transparent conducting films deposited by direct current magnetron sputtering

Highly conducting and transparent thin films of tungsten-doped ZnO (ZnO:W) were prepared on glass substrates by direct current (DC) magnetron sputtering at low temperature. The effect of film thickness on the structural, electrical and optical properties of ZnO:W films was investigated. All the deposited films are polycrystalline with a hexagonal structure and have a preferred orientation along the c-axis perpendicular to the substrate. The electrical resistivity first decreases with film thickness, and then increases with further increase in film thickness. The lowest resistivity achieved was 6.97 × 10⁻⁴ Ω cm for a thickness of 332 nm with a Hall mobility of 6.7 cm² V⁻¹ s⁻¹ and a carrier concentration of 1.35 × 10²¹ cm⁻³. However, the average transmittance of the films does not change much with an increase in film thickness, and all the deposited films show a high transmittance of approximately 90% in the visible range.     

磁控溅射薄膜生长全过程的计算机模拟研究

本文通过建立多尺度模型,结合模拟了磁控溅射中溅射原子的产生、溅射原子的碰撞传输、以及最终成膜的全过程,研究了基板温度、溅射速率、磁场分布和靶材-基板间距对薄膜生长过程与薄膜性能的影响.模拟结果显示,提高基板温度或降低溅射速率都会增加初期生长阶段薄膜的相对密度;磁场对靶的利用率有显著的影响,而对薄膜最终形貌的影响不大;增大靶材-基板间距会降低薄膜的粗糙度.     

Effects of Homo-buffer Layer on Properties of Sputter-deposited ZnO Films

Two-step growth regimes were applied to realize a homoepitaxial growth of ZnO films on freestanding diamond substrates by radio-frequency(RF)reactive magnetron sputtering method.ZnO buer layers were deposited on freestanding diamond substrates at a low sputtering power of 50 W,and then ZnO main layers were prepared on this buffer layer at a high sputtering power of 150 W.For comparison,a sample was also deposited directly on freestanding diamond substrate at a power of 150 W.The effects of ZnO buffer layers...