研究目的

Investigating the luminescence mechanism of Nd3+ ions in borate aluminum glass based on their electron paramagnetic resonance spectra and luminescence properties.

研究成果

The luminescence mechanism of Nd3+: B2O3-Al2O3-CaO glasses was investigated using EPR. The EDEPR exhibited two different resonance positions, indicating a change in the Nd3+ coordination environment. The HYSCORE exhibited 27Al and 11B signals, which were found in the (+, +) quadrant. This indicates that the electron-nuclei interaction satisfies the weak coupling condition. Thus, these nuclei are located in the second or higher order Nd3+ coordination shell (4?8 ? range distance). The 27Al peak amplitude changed only slightly for all samples, whereas the 11B peak amplitude increased for the 1D HYSCORE projection, which suggests that the fraction of B atoms in the Nd3+ coordination sphere increased with the addition of B2O3 to the glass. The continuous changes in the HST intensity and luminescence (J-O parameters, σems, Δλeff, and τrad) are strong indicators of the changes in the Nd3+ coordination shell, which are influenced by the amount of B2O3.

研究不足

The study is limited to the investigation of the luminescence mechanism of Nd3+ ions in borate aluminum glass with varying amounts of B2O3. The natural abundance of 17O is only 0.038%, which could not be probed.