论文标题
在紫外线激发下H-BN纳米牛的长寿命发光的光谱表征
Spectral characterization of long-lived luminescence in h-BN nanopowder under UV excitation
论文作者
论文摘要
纳米结构的H-BN粉末的光致发光（PL）特征在毫秒时窗口的200-600 nm范围内进行了研究。发现四个PL激发带为4.58、5.01、5.29和5.77 eV是手头光谱区域的特征。结果表明，可以通过三个高斯形峰的叠加来定量描述PL发射光谱：2.6、3.1和3.7 eV。可观察到的发光是由于涉及中心的重组过程而建立的，这些中心的能量水平是由氧气和碳杂质以及氮的空位和相关复合物形成的。
Photoluminescence (PL) features of nanostructured h-BN powder are studied in the range of 200-600 nm in millisecond time window. It is found that four PL excitation bands of 4.58, 5.01, 5.29, and 5.77 eV are characteristic of the spectral region at hand. It is shown that the PL emission spectra can be quantitatively described through a superposition of three Gaussian-shaped peaks: 2.6, 3.1, and 3.7 eV. The observable luminescence is established to be due to recombination processes involving centers whose energy levels in the bandgap are formed by oxygen and carbon impurities, as well as nitrogen vacancies and related complexes.
