Phosphorescence properties of sol–gel derived ruby measured as functions of temperature and Cr3+ content
Phosphorescence properties of sol–gel derived ruby measured as functions of temperature and Cr3+ content
复制标题
溶胶-凝胶衍生红宝石的磷光特性测量为温度和 Cr3+ 含量的函数
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
B. Atakan
中科院分区：
文献类型：
--
作者：
Christian Pflitsch;R. A. Siddiqui;B. Atakan
非接触式测量表面温度的一种新方法是评估铬掺杂氧化铝（红宝石）涂层的温度依赖性磷光性质，如磷光强度，光谱分布，或磷光寿命。然而，这些性能也受到膜中铬含量的影响。在本研究中的磷光寿命进行了研究的第一次作为铬含量的函数。我们用一种简单的溶胶-凝胶沉积技术在Si（100）衬底上制备了精确掺杂的红宝石涂层。这些涂层（Cr与Al的比率y在0%和6.8at. %之间）非常适合于研究铬浓度对磷光性质的影响：在室温（294 K）下，磷光强度受到铬掺杂的强烈影响（最大值在y = 1-1.5%），而光谱仅随着铬含量的变化而轻微偏移。在294 K下，磷光寿命τ随Cr ~（3+）含量的变化而保持不变，当Cr ~（3+）含量低于y ≤ 1.1%时，磷光寿命τ急剧下降。因此，掺杂钇1%的红宝石作为温度传感器似乎是最有前途的，因为它显示出最高的磷光强度和低的磷光寿命的变化。由于后一种性质，来自τ的温度评估受不精确掺杂的影响较小。测量了Si（100）衬底上几种溶胶-凝胶红宝石涂层（y=1.1%）的磷光寿命随温度的变化关系，在294 K时为2.7 ms，在833 K时为4 μs。
A novel approach for the contactless measurement of surface temperatures is to evaluate the temperature dependent phosphorescence properties of chromium doped aluminium oxide (ruby) coatings, such as phosphorescence intensity, spectral distribution, or the phosphorescence lifetime. However, these properties are also affected by the chromium content in the films. In the present study the phosphorescence lifetimes were studied for the first time as a function of the chromium content. We use a simple sol–gel depositing technique for the preparation of precisely doped ruby coatings in Si(100) substrates. These coatings (Cr-to-Al-ratios y between 0% and 6.8 at. %) are well suited for studying the influence of the chromium concentration on the phosphorescence properties: at room temperature (294 K), the phosphorescence intensity is strongly affected by the chromium doping (maximum at y∼1–1.5%) while the spectrum shifts only slightly with varying chromium content. The phosphorescence lifetime τ at 294 K remains constant with varying Cr3+ content below y∼1.1%, and decreases strongly above y∼1.1%. Thus, ruby doped with y∼1% seems to be most promising as a temperature sensor because it shows the highest phosphorescence intensity and a low variance in the phosphorescence lifetimes. Due to the latter property the temperature evaluation from τ is less affected by imprecise doping. The phosphorescence lifetimes of several sol–gel ruby coatings (y=1.1%) on Si(100) substrates were measured as a function of the temperature to be between 2.7 ms at 294 K and 4 μs at 833 K.
影响因子：
8.4
作者：
SZMACINSKI, H;LAKOWICZ, JR
通讯作者：
LAKOWICZ, JR