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利用分子束外延系统在Si (001) 衬底上制备了单晶Tm2O3薄膜, 利用X射线光电子能谱研究了Tm2O3相对于Si的能带偏移. 得出Tm2O3相对于Si的价带和导带偏移分别为3.1 eV± 0.2 eV和1.9 eV± 0.3 eV, 并得出了Tm2O3的禁带宽度为6.1 eV± 0.2 eV. 研究结果表明Tm2O3是一种很有前途的高k栅介质候选材料.
关键词:
2O3')" href="#">Tm2O3
X射线光电子能谱
能带偏移 相似文献
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A prototype multi-gap resistive plate chamber (MRPC) with a 2×6 gap structure is developed for the upgrading of the endcap time-of-flight (ETOF) detector in the Beijing Spectrometer (BESⅢ). The prototype MRPC is tested in the E3 beam line of the Beijing Electron Positron Collider (BEPC) with secondary charged particles (π and p, etc) of 600 MeV/c. The test results show that the time resolution of the MRPC can reach 50 ps and that the detection efficiency is greater than 98%. 相似文献
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We present the preliminary results on the spin alignment matrix
element ρ00 for vector mesons K*0(892) and
φ(1020) in mid-central (20%—60%) Au+Au and p+p collisions at sNN=200GeV. The values of ρ00 with respect to reaction plane in Au+Au collisions are 0.36±0.02(stat)±0.13(sys) for K*0(892) and 0.38±0.01 (stat)±0.04 (sys) for φ(1020). No evident global spin alignment with respect to reaction plane is observed in the measured pT region up to 5GeV/c with current sensitivity. ρ00 with respect to the production plane of the vector meson is also measured for K*0(892) and φ(1020) in Au+Au collisions, and for φ(1020) in p+p collisions. No significant difference for the ρ00 between Au+Au and p+p collisions is observed with our data sample. 相似文献
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This paper reports that stoichiometric, amorphous, and uniform Er2O3 films are deposited on Si(001) substrates by a radio frequency magnetron sputtering technique. Ellipsometry measurements show that the refractive index of the Er2O3 films is very close to that of a single layer antireflection coating for a solar cell with an air surrounding medium during its working wavelength. For the 90-nm-thick film, the reflectance has a minimum lower than 3% at the wavelength of 600 nm and the weighted average reflectances (400-1000 nm) is 11.6%. The obtained characteristics indicate that Er2O3 films could be a promising candidate for antireflection coatings in solar cells. 相似文献
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调制辐射体的可见和近红外区域的辐射光谱与光伏电池吸收光谱的匹配是开发高性能热光伏电池技术的关键.采用电子束蒸发在单晶硅衬底上制备金属Er薄膜并进行后氧化处理制备Er_2O_3薄膜型辐射体.X射线衍射结果表明薄膜结晶良好,且Si基底对Er_2O_3薄膜的晶体结构没有显著影响.X射线光电子能谱拟合结果表明薄膜中Er元素和O元素符合Er_2O_3的化学计量比.高温近红外光谱测试结果表明,样品在1550 nm左右出现了明显的Er~(3+)离子的特征辐射峰,这与GaSb光电池的吸收光谱相匹配. 相似文献
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This paper reports that Eu-doped ZnO films were successfully deposited on silicon (100) by radio-frequency magnetic sputtering. The x-ray diffraction patterns indicate that Eu substitutes for Zn in the lattice. Ferromagnetic loops were obtained by using superconducting quantum interference device at 10 K and room temperature. No discontinuous change was found in both of the zero-field-cooled and field-cooled curves. The observed ferromagnetism in Eu-doped ZnO can be attributed to a single magnetic phase. The saturation magnetisation decreased remarkably for the Eu-doped ZnO prepared by introducing 5% of oxygen in the sputtering gas or by the post annealing in O2, suggesting that the defects play key roles in the development of ferromagnetism in Eu-doped ZnO films. 相似文献
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用射频反应溅射法在Si(111)衬底上制备了C轴取向的多晶ZnO薄膜,通过不同温度的退火处理,研究了退火对多晶ZnO薄膜结构和发光特性的影响.由x射线衍射得知,随退火温度的升高,晶粒逐渐变大,薄膜中压应力由大变小至出现张应力.光致发光测量发现,样品在430nm附近有一光致发光峰, 峰的强度随退火温度升高而减弱,联合样品电阻率随退火温度升高而逐渐变大的测量及能级图,推测出ZnO薄膜中的蓝光发射主要来源于锌填隙原子缺陷能级与价带顶能级间的跃迁.
关键词:
ZnO薄膜
退火
光致发光
射频反应溅射 相似文献
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