紫外线辐射化 (AlN) 的热发光特性
Rodrigo Martínez-Baltezar1, Juan Azorín-Nieto1, Ricardo Martinez-Baltazar2
1Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, Mexico City, Mexico.
概括
化 (AlN) 在紫外线辐射检测方面显示出有前途的热发光 (TL) 特性. 它的TL发光曲线受到碳和氧杂质的影响,表明它有可能成为TL剂量计.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 辐射检测检测器可以检测到辐射.
背景情况:
- 热发光 (Thermoluminescence,TL) 是一种现象,材料在暴露于辐射后被加热后会发光.
- 化 (AlN) 是一种宽带差半导体,在各种领域都有潜在的应用.
- 对AlN的热发光特性进行表征对于探索其剂量测量应用至关重要.
研究的目的:
- 通过化学蒸汽沉积 (CVD) 合成的化 (AlN) 的热发光 (TL) 特性.
- 评估AlN作为超紫外 (UV) 辐射热发光剂量计 (TLD) 的材料的潜力.
主要方法:
- 使用化学蒸汽沉积 (CVD) 合成AlN.
- 使用X射线衍射 (XRD),富里埃变换红外光谱 (FT-IR),光发光 (PL) 和能量分散式X射线光谱扫描电子显微镜 (EDS-SEM) 的表征.
- 使用 xenon (Xe) 灯进行紫外线 (UV) 照射后的热发光 (TL) 测量,然后进行光曲线解卷.
主要成果:
- XRD证实了AlN的六角晶体结构.
- EDS-SEM和FT-IR确定了碳 (C) 和氧 (O) 作为杂质,影响了TL的特性.
- 在450 K左右观察到一个突出的TL峰值,解卷显示了383 K到637 K之间的六个峰值.
- TL反应显示,随着紫外线剂量的增加,TL反应呈逻辑增长.
结论:
- 化 (AlN) 具有显著的热发光 (TL) 特性.
- 碳和氧等杂质的存在和分布会影响TL发光曲线.
- 是开发紫外线辐射剂量计的有希望的候选材料.
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