共查询到19条相似文献,搜索用时 437 毫秒
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全固态薄膜锂离子电池(Thin Film Lithium Ion Battery,TFLB)在微型器件储能领域具有巨大的应用潜力,传统上多采用射频磁控溅射生长LiPON薄膜的方法获得稳定的固态电解质层.文章主要研究了基于偏轴磁控溅射技术的LiPON薄膜制备方法,通过改变薄膜沉积过程中的N2气压值,在0.2 Pa气压下获得了锂离子电导率达到2.4×10-6 S?cm-1的固态电解质层;同时,将优化后的LiPON薄膜应用于LiCoO2/LiPON/Li结构的TFLB中.实验结果表明,TFLB在0.1 C倍率下首次放电容量可达62.1μA?h?cm-2?μm-1,而在高倍率(4 C)条件下放电容量依然可达51.7μA?h?cm-2?μm-1,经过0.1 C、0.5 C、1 C、2 C、4 C倍率条件下各5次充放电循环后,TFLB在0.1 C倍率下的容量保有率仍高达90%,展示出了良好的器件性能. 相似文献
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采用磁控溅射技术制备Pd/SnO2/SiO2/Si集成薄膜.研究退火处理对薄膜微观结构和表面形貌的影响,进而测试了相关的气敏性能.实验证明,经过氧化性退火处理,集成薄膜中的SiO2层厚度从3 nm增长到50 nm左右,形成Pd/SnO2/SiO2/Si结构,SnO2薄膜形成金红石结构的多孔柱状晶.气敏测试表明,Pd/SnO2/SiO2/Si集成薄膜在低温区对H2、CH4、CO和C2 H5OH敏感性较高,另外,随着H2气体浓度的增加,相应灵敏度从35递增至73.5. 相似文献
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研制了一种适合于乙醇检测的新型TiO2基薄膜气敏传感器.敏感材料是采用直流磁控反应溅射法制备在Al2O3陶瓷管上的TiO2薄膜,薄膜经过退火处理(500℃、3 h)后,得到对乙醇蒸汽具有很好选择性和灵敏度的锐钛矿相TiO2,其最佳工作温度为270℃左右,响应时间2 s,恢复时间3 s.测量电路采用以ARM7为核的LPC2131微控制器实时监测电源电压,自动调整占空比,从而实现对加热温度的精确控制.通过测量敏感薄膜的电阻,并与乙醇气体浓度进行校准,最终显示被测气体的浓度.整个传感器采用低功耗设计,具备报警功能,同时提供了一个友好的用户界面. 相似文献
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用磁控溅射法(RMS)制备了SiC微晶薄膜,并对其进行了退火处理.用AFM观察了薄膜的表面形貌,测量了薄膜的厚度、方块电阻和电阻-温度曲线.结果表明:薄膜表面平整光滑;退火处理前后薄膜样品的lnR随1/kT的变化曲线均满足表达式,电子激活能的变化范围为0.0142 eV~0.0185 eV,且随退火温度的升高而增大;分析确定其导电机理为定域态间近程跳跃电导.退火前后薄膜电阻率的范围为2.4×10-3~4.4×10-Ω·cm,且随退火温度的升高而增大,与电子激活能的变化趋势一致,这进一步验证了本文提出的薄膜导电机理和激活能随退火温度的变化趋势. 相似文献
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采用V2O5粉末为原料、苯甲醇、异丁醇为溶剂,通过溶胶-凝胶工艺在玻璃衬底上制备了用于非制冷红外探测器件热敏材料的氧化钒薄膜。利用四探针、椭偏仪、XPS等技术,分别测量所制备薄膜的电阻、厚度和化学成分,总结出前驱溶液配比、退火温度、膜厚等因素对薄膜电学性能的影响。结果表明,利用原料配比为V2O5:异丁醇:苯甲醇(g:mol:mol)=1:40:4的前驱溶液,所制备的厚度为440hm的氧化钒薄膜,并经500℃退火处理,显示出的电学性能最为理想,此时氧化钒薄膜的方阻为52.284kΩ(30℃),TCR为-3.43%/K(30℃)。 相似文献
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M. M. Sychov Y. Nakanishi H. Nakajima V. Gnatyuk T. Magami H. Kominami Y. Hatanaka 《Journal of the Society for Information Display》2003,11(3):499-503
Abstract— Europium‐activated yttrium oxysulfide thin films were fabricated by electron‐beam deposition of Y2O2S:Eu with consequent annealing in an H2S/Ar gas mixture. Transformations in film composition and surface morphology as well as corresponding changes in the optical, photoluminescent, and cathodoluminescent properties were studied and will be discussed. It is shown that 248‐nm laser irradiation of heat‐treated films improves cathodoluminescence by as much as 30%, supposedly due to annealing. The developed phosphor films have a luminance comparable to that of annealed europium‐activated yttrium oxide films and improved color properties (CIE color coordinates: x = 0.624, y = 0.329), and are suitable for display and optoelectronics applications. 相似文献
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Thin films of CdS, Bi2S3 and composite CdS–Bi2S3 have been deposited using modified chemical bath deposition (M-CBD) technique. The various preparative parameters were optimized to obtain good quality thin films. The as-deposited films of CdS, Bi2S3 and composite were annealed in Ar gas at 573 K for 1 h. A comparative study was made for as-deposited and annealed CdS, Bi2S3 and composite thin films. Annealing showed no change in crystal structure of these as-deposited films. However, an enhancement in grain size was observed by AFM studies. In addition change in band gap with annealing was seen. A study of spectral response, photosensitivity showed that the films can be used as a photosensor. 相似文献
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对NiFe/SiO_2/NiFe薄膜可消除巴克豪生噪声及其对磁场梯度敏感的原理进行了分析,作为薄膜磁头材料进行了读取垂直磁记录信号实验,结果表明,这种薄膜是一种具有高分辨率的、低噪声的磁电阻磁头材料。 相似文献
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设计了一种适用于深低温环境的微型加热器。使用AC磁控溅射技术将NiCr(80/20 at.%)合金沉积到SiO2/Si基底上,并采用微加工工艺实现薄膜图形化,作为加热器的加热元件。研究了NiCr薄膜的电学性能和晶体结构与退火条件之间的关系。实验表明:在450℃氮气环境下退火30min,可以获得深低温性能优良的NiCr加热器。该加热器在20K时的电阻温度系数(TCR)为80.80×10-6/K。X射线衍射(XRD)分析显示NiCr薄膜在450℃氮气环境下退火后,薄膜的结晶度增大,因此,退火条件对薄膜的电阻率和电阻温度系数有较大的影响。 相似文献
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Preparation of BST ferroelectric thin film by metal organic decomposition for infrared sensor 总被引:2,自引:0,他引:2
Barium strontium titanate (Ba1−xSrxTiO3) ferroelectric thin films have been prepared by metal organic decomposition (MOD) on Pt/Ti/SiO2/Si and on micromachined wafer with an aim to fabricate dielectric bolometer type infrared (IR) sensor. The XRD pattern and D–V hysteresis curve of the film have been measured in order to investigate the effects of the final annealing temperature and annealing time on the property of the film. The results show that the films annealed at 700 °C or 800 °C all have good perovskite structure, while the film annealed at 800 °C has better ferroelectric loops. Films annealed at 800 °C with different annealing time from 5 to 60 min show a similar perovskite structure, among which films annealed at 30 and 60 min condition have the better ferroelectric loops. Temperature coefficient of dielectric constant (TCD) of the MOD made BST thin film on micromachined substrate is about 1%/K. The uniformity of the BST film on micromachined Si wafer also has been confirmed to be good enough for operation of sensor array. Chopperless operation has been attained and infrared response evaluation of the fabricated sensor also has been carried out with Rv of 0.4 kV/W and D* of 1.0×108 cm Hz1/2/W, respectively. 相似文献
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Woon‐Seop Choi 《Journal of the Society for Information Display》2009,17(9):751-755
Abstract— High‐quality ZnO thin films for transparent thin‐film transistors (TFTs) were successfully prepared by using an injection‐type source delivery system for atomic layer deposition (ALD). By using this delivery system, the source delivery pulse time was dramatically reduced to 0.002 sec to minimize processing time. The growth of ZnO thin film at a relatively low temperature of 150°C shows good characteristics. The process factors on the reactants for film growth were characterized. The bottom‐contact bottom‐gate ZnO TFT shows good electrical properties with solid saturation. 相似文献