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报道了利用ZnO和Li2O混合物在5GPa, 1200 ℃—1500 ℃条件下, 制备Li掺杂p型ZnO(记作ZnO: Li)固溶体的过程. 研究发现, 高压下温度对于ZnO: Li固溶体的导电类型以及结构具有较大的影响. 其中在1500 ℃条件下烧结的ZnO: Li(Li的掺杂量4.5%)表现出良好的p型电学性能, 其电阻率为3.1× 10-1Ω·cm, 载流子浓度为3.3× 1019cm-3, 迁移率为27.7cm2·V-1·s-1. 通过实验及理论计算确定了其受主能级为110meV, 讨论了压力对p型ZnO的形成和电学性能的影响. 相似文献
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考虑ZnO优秀的物理和化学性能以及由于生长温度低而具有更低的缺陷密度从而易于实现高的光电器件效率等特点,本文采用射频磁控溅射和金属有机化学汽相沉积(MOCVD)方法在石英及蓝宝石衬底上生长了立方结构MgZnO薄膜,制备了MgZnO的MSM型紫外探测器。该器件实现了在日盲(太阳盲)波段的光响应,典型的光响应峰值分别在225和250nm,截止边为230和273nm。 相似文献
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利用射频磁控溅射设备制备ZnO薄膜, 最终制备ZnO/Pt纳米粒子/ZnO 结构的金属-半导体-金属型紫外光电探测器. 研究了Pt纳米粒子处在ZnO薄膜层中的不同深度对金属-半导体-金属型紫外光电探测器响应性能的影响. 结果表明, 探测器的响应度随着Pt纳米粒子在ZnO薄膜层中所处深度的增大而升高. 在60 V偏压下, 包埋Pt最深的探测器在波长365 nm处取得响应度最大值1.4 A·W-1, 包埋有Pt探测器的响应度最大值为无Pt 纳米粒子探测器响应度最大值的7倍. 结合对ZnO薄膜表面的表征及探测器各项性能的测试, 得出包埋Pt纳米粒子增强器件的响应性能可归因于表面等离子体增强散射. 相似文献
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Using the technique of high-temperature melting, a new Er3+/Yb3+ co-doped fluorophosphate glass was prepared. The absorption and fluorescence spectra were investigated in depth. The effect of Er3+ and Yb3+ concentration on the spectroscopic properties of the glass sample was also discussed. According to the Judd Ofelt theory, the oscillator strength was computed. The lifetime of 4113/2 level (t-m) of Er3+ ions was 8.23 ms, and the full width at half maximum of the dominating emission peak was 68 nm at 1.53 μm. The large stimulated emission cross section of the Er3+ was calculated by the McCumher theory. The spectroscopic properties of Er3+ ion were compared with those in different glasses. The full width at half maximum and σe are larger than those of other glass hosts, indicating this studied glass may be a potentially useful candidate for high-gain erbium-doped fiber amplifier. 相似文献
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Spectroscopic properties in Er<sup>3+</sup>/Yb<sup>3+</sup> Co-doped fluorophosphate glass 下载免费PDF全文
Using the technique of high-temperature melting, a new Er 3+ /Yb 3+ co-doped fluorophosphate glass was prepared. The absorption and fluorescence spectra were investigated in depth. The effect of Er 3+ and Yb 3+ concentration on the spectroscopic properties of the glass sample was also discussed. According to the Judd–Ofelt theory, the oscillator strength was computed. The lifetime of 4 I 13/2 level (τ m ) of Er 3+ ions was 8.23 ms, and the full width at half maximum of the dominating emission peak was 68 nm at 1.53 μm. The large stimulated emission cross section of the Er 3+ was calculated by the McCumber theory. The spectroscopic properties of Er 3+ ion were compared with those in different glasses. The full width at half maximum and σ e are larger than those of other glass hosts, indicating this studied glass may be a potentially useful candidate for high-gain erbium-doped fiber amplifier. 相似文献
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本文利用金属有机气相沉积法(MOCVD)生长单一立方相Mg0.57Zn0.43O (记作立方MZO)合金薄膜, 以及该合金薄膜在后期热处理过程中质量和热稳定性的关系. 通过X射线衍射等测试发现, 后期热处理对于立方MZO合金薄膜质量具有较大的影响. 其中在500–850℃的条件下, 合金薄膜的结晶质量和表面形貌随温度的增加得到明显的改善, 吸收截止边逐渐蓝移,带隙展宽, 但仍保持单一立方结构. 当温度达到950℃时立方MZO合金薄膜出现混合相. 通过对立方MZO合金薄膜制备的MSM型单元器件进行光响应的测试表明, 在外加15 V的偏压下, 器件的响应峰值在260 nm附近,紫外/可见抑制比大约为4个数量级, 饱和响应度为3.8 mA/W, 暗电流值为5 pA左右.
关键词:
MOCVD
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热处理
光响应 相似文献