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光电变色器件用纳米晶氧化钛薄膜的微结构与特性 总被引:2,自引:2,他引:0
纳米晶TiO2薄膜在光电变色器件中具有很重要的作用。它的微结构直接影响染料的吸附、光的散射以及电荷输运的特性。因此,探索TiO2薄膜的微结构(如粒径、表面形貌和厚度等)及光电性能是非常有意义的。采用电子束蒸发工艺制备了光电变色器件用纳晶TiO2薄膜,利用原子力显微镜、X射线衍射、俄歇电子能谱等手段对纳米晶TiO2薄膜的表面形貌、结晶状态及组分进行了分析。从理论上研究和讨论了纳米晶TiO2薄膜晶粒尺寸对光电性能的影响,并用量子限制效应解释了吸收光谱峰值波长随粒径减小而发生蓝移的现象。 相似文献
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A hybrid model for the charging process of the amorphous SiO2 film in radio frequency microelectromechanical system capacitive switches 下载免费PDF全文
Charging is one of the most important reliability issues in radio frequency microelectro-mechanical systems(RF MEMS) capacitive switches since it makes the actuation voltage unstable.This paper proposes a hybrid model to describe the transient dielectric charging and discharging process in the defect-rich amorphous SiO 2 RF MEMS capacitive switches and verifies experimentally.The hybrid model contains two parts according to two different charging mechanisms of the amorphous SiO 2,which are the polarisation and charge injection.The models for polarisation and for charge injection are established,respectively.Analysis and experimental results show that polarisation is always effective,while the charge injection has a threshold electric field to the amorphous SiO 2 film.Under different control voltage conditions,the hybrid model can accurately describe the experimental data. 相似文献
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