Blue Emission by Interstitial Site Occupation of Ce3+ in AlN
Blue Emission by Interstitial Site Occupation of Ce3+ in AlN
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DOI：
10.1021/cm301979y
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发表时间：
2012-08
影响因子：
8.6
通讯作者：
Tzu-Chen Liu;H. Kominami;H. Greer;Wuzong Zhou;Y. Nakanishi;Ru‐Shi Liu
中科院分区：
文献类型：
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作者：
Tzu-Chen Liu;H. Kominami;H. Greer;Wuzong Zhou;Y. Nakanishi;Ru‐Shi Liu
通过在 0.92 MPa 氮气气氛中、2050 ℃下气压烧结 (GPS) 4 h 合成了 Ce3+ 和 Si4+ 离子共活化的 AlN 荧光粉。该荧光粉发射蓝色，国际照明委员会（CIE）色度坐标为（0.15，0.07），接近国家电视标准委员会（NTSC）蓝色坐标。通过 Rietveld 精修和高分辨率透射电子显微镜 (HRTEM) 研究了样品的结晶和细胞参数。由于Ce3+离子的离子尺寸远大于Al3+离子的离子尺寸，因此稀土（RE）离子在AlN晶格中的位置尚不清楚。纤锌矿结构内的八面体间隙位点被认为是稀土离子的位点。通过能量色散X射线光谱（EDX）和固态核磁共振（ssNMR）验证了Si取代的效果。在不同加速电压下的电子轰击下检查阴极发光（CL）。尼...
An AlN phosphor that was coactivated by Ce3+ and Si4+ ions was synthesized by gas pressure sintering (GPS) at 2050 °C for 4 h in a 0.92 MPa nitrogen atmosphere. The phosphor emits blue color with the Commission International de l’Eclairage (CIE) chromaticity coordinate of (0.15, 0.07), which is close to the National Television Standard Committee (NTSC) blue coordinate. The crystallization and cell parameters of the samples were investigated by Rietveld refinement and high-resolution transmission electron microscopy (HRTEM). Since the ionic size of Ce3+ ions are much larger than that of Al3+ ions, the locations of rare earth (RE) ions in the AlN lattice are unclear. An octahedral interstitial site inside the wurtzite structure is proposed to be the site for RE ions. The effect of Si substitution was verified by energy-dispersive X-ray spectroscopy (EDX) and solid-state nuclear magnetic resonance (ssNMR). Cathodoluminescence (CL) was examined under electron bombardment at different accelerating voltages. Ni...