共查询到19条相似文献,搜索用时 62 毫秒
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TCO薄膜具有高电导率、高可见光区透射率等特点,ZnO薄膜在透明导电材料(TCO)领域如太阳能电池、半导体激光器(LD)、发光二极管(LED)等光电嚣件上得到了广泛应用。为制备高质量的TCO薄膜,我们选择合适的衬底材料和良好的制备技术及工艺。本文采用磁控溅射实验方法。在相同溅射条件下制备出了Al-N共掺ZnO薄膜和无掺杂ZnO薄膜,然后对这两种薄膜进行了AFM、XRD、Hau测试对比分析,确定了掺杂与非掺杂ZnO薄膜优缺点,实验结果表明掺杂为Al—N共掺ZnO薄膜的各项性能指标均优于未掺杂ZnO薄膜,为进一步研究ZnO薄膜在实际应用打下一定的基础。 相似文献
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ZnO薄膜紫外光敏特性及晶界势垒的研究 总被引:1,自引:0,他引:1
以二水合醋酸锌为原料,采用sol-gel法在石英衬底上制备了ZnO薄膜。用AFM观察表面形貌,通过测量真空条件下不同温度热处理后薄膜的I-V特性,拟合计算晶界势垒高度。研究了热处理温度对ZnO薄膜性能的影响。结果表明:经650℃热处理制备的ZnO薄膜样品具有较佳性能,结构均匀致密,粒径分布为20~32nm。在10V偏压和1.24×10–3W/cm2光强下,紫外光灵敏度为43.95;无光照条件下晶界势垒高度为0.079eV。紫外光照使晶界势垒高度下降为0.011eV,薄膜的紫外光灵敏度与势垒高度的相对变化密切相关。 相似文献
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N掺杂p型MgZnO薄膜的制备与性能研究 总被引:1,自引:0,他引:1
利用磁控溅射设备,Mg0.04Zn0.96O陶瓷靶材,以高纯的氮气与氩气混合气体作为溅射气体,在石英衬底上沉积获得了N掺杂p型Mg0.07Zn0.93O薄膜,薄膜的电阻率为21.47Ω·cm,载流子浓度为8.38×1016 cm-3,迁移率为3.45cm2/(V·s)。研究了该薄膜的结构与光学性能。实验结果显示,其拉曼光谱中出现了位于272和642cm-1左右与NO相关的振动模。低温光致发光光谱中,可以观察到位于3.201,3.384和3.469eV的3个发光峰,其中位于3.384eV的发光峰归因为导带电子到缺陷能级的复合发光,而位于3.469eV的发光峰归因为受主束缚激子(A0X)的辐射复合,这说明该N掺杂MgZnO薄膜的空穴载流子主要来自NO受主的贡献。 相似文献
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在Corning 1737玻璃衬底上射频磁控溅射沉积了铝掺杂ZnO薄膜(ZnO∶Al).薄膜沉积在衬底温度250℃、溅射功率100W和纯氩气氛中进行.通过在0.2~3.2Pa范围改变溅射氩气氛压力pAr,研究了不同pAr对样品的晶体结构、电学特性、光学特性和表观形貌的影响.利用X射线衍射(XRD)、透射和反射谱测量、扫描电子显微镜(SEM),发现不同pAr下ZnO∶Al薄膜都具有垂直于衬底C轴择优取向.在可见光谱范围,pAr对透过率的影响非常小,薄膜的平均透过率大于83%,但红外透过率与薄膜的电阻率成正比.在较低的溅射气压下(pAr=0.2Pa)获得的薄膜电阻率最小,对应有大的光学带隙(3.61eV).随着pAr的降低,晶粒尺寸增大.pAr对ZnO∶Al薄膜的表观形貌有显著的影响. 相似文献
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利用磁控溅射技术,以Mg0.06Zn0.94O为陶瓷靶材,制备了N掺杂p型Mg0.1 3Zn0.8 7O薄膜,薄膜的电阻率为42.45Ω·cm,载流子浓度为3.70×1017/cm3,迁移率为0.40cm2·V-1·s-1。研究了该薄膜p型导电性质在室温空气下随时间的变化情况。实验结果表明,薄膜的电阻率逐渐升高,载流子浓度降低,五个月以后,薄膜转变为n型导电,电阻率为85.58Ω·cm,载流子浓度为4.53×1016/cm3,迁移率为1.61cm2·V-1·s-1。真空热退火后重新转变为p型。结果显示,其p型导电类型的转变与在空气中吸附H2O或H2等形成浅施主有关。 相似文献
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工作压强和退火温度对SiC薄膜结构的影响 总被引:1,自引:0,他引:1
用双射频共溅射和溅射后退火的方法在单晶Si(111)衬底上制备了SiC薄膜。利用X射线衍射仪(XRD)、扫描电镜(SEM)及原子力显微镜(AFM)分析了样品的物相组成、形貌和结构。研究发现,此种方法制备得到8H-SiC薄膜,在1.5~3Pa时增大工作压强有利于SiC薄膜退火之后结晶,同时薄膜沉积速率降低,使生长变致密,粗糙度减小,薄膜表面趋于平滑。对SiC薄膜进行850、1000、1150℃退火,结果表明,适当升高退火温度有利于提高薄膜的结晶质量和晶化程度,提高薄膜的致密度,降低薄膜中的缺陷密度。 相似文献
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Dipak L Gapale Pranav P.Bardapurkar Sandeep A.Arote Sanjaykumar Dalvi Prashant Baviskar Ratan Y Borse 《半导体学报》2021,42(12):69-78
In the present work,ferrite (Fe) doped TiO2 thin films with different volume percentage (vol%) were synthesized us-ing a spray pyrolysis technique.The effect of Fe doping on structural properties such as crystallite size,texture coefficient,mi-crostrain,dislocation densities etc.were evaluated from the X ray diffratometry (XRD) data.XRD data revealed a polycrystalline anatase TiO2 phase for sample synthesized up to 2 vol% and mixed anatase and rutile crystalline phase for sample synthesized at 4 vol% Fe doped TiO2.The crystalline size was observed to decrease with increase in Fe dopant vol% and also other structur-al parameters changes with Fe dopant percentage.In the present work,electrical resistance was observed to decrease with a rise in Fe dopant vol% and temperature of the sample.Thermal properties like temperature coefficient of resistance and activa-tion energy also showed strong correlation with Fe dopant vol%.Humidity sensing properties of the synthesized sample altered with a change in Fe dopant vol%.In the present paper,maximum sensitivity of about 88.7% for the sample synthes-ized with 2 vol% Fe doped TiO2 and also the lowest response and recovery time of about 52 and 3 s were reported for the same sample. 相似文献
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The microstructure of as-deposited Co thin films on silicon (001) substrate was characterized by TEM using wedge-shaped planar-view
samples. Selected area electron diffraction showed that the as deposited Co thin films were composed of Co (α) and that no
interfacial reaction took place between Co thin films and the Si substrate. The microstructure of Co thin films annealed at
250°C for 30 min was also investigated by using conventional planar-view samples. The analysis of selected area electron diffraction
indicates that Co thin films react entirely with the Si substrate, and a silicide layer forms at the Co/Si interface. Dark
field images clearly indicate that the interfacial layer consists of Co2Si in irregular stripes and CoSi as fine particles but no CoSi2 forms. 相似文献