High pressure induced disappearing 5D0 → 7F2 and broadening 5D0 → 7F1 transitions from Y2Hf2O7:Eu3+ nanoparticles
High pressure induced disappearing 5D0 → 7F2 and broadening 5D0 → 7F1 transitions from Y2Hf2O7:Eu3+ nanoparticles
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DOI：
10.1016/j.matlet.2021.130560
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发表时间：
2021-11
影响因子：
3
通讯作者：
S. Gupta;Yuanbing Mao
中科院分区：
文献类型：
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作者：
S. Gupta;Yuanbing Mao
可调谐荧光粉作为压力传感器的设计引起了人们极大的关注。高压下Y2 Hf 2 O 7：Eu 3+发光纳米粒子的声子频率降低，晶场增强，局域位置交换效应增强，表现为出现5D 1/5D2能级发射，磁偶极跃迁宽度增加（达~ 11.43GPa），在5.7GPa以上，Eu 3+离子周围对称性增强，5D 0 → 7 F2跃迁消失。我们的研究结果表明，潜在的Y2 Hf 2 O 7：Eu 3+纳米颗粒作为中等范围的压力传感器与可调发光从红色到橙子黄色的压力范围为0-49.4 GPa。
Design of color tunable phosphors as pressure sensors has drawn immense attention. In this work, luminescent Y2Hf2O7:Eu3+nanoparticles upon high pressure demonstrate lowered phonon frequency, enhanced crystal field, and increased local site swapping effect as manifested with appearing emission of5D1/5D2levels, increasing width of magnetic dipole transition (up to ~11.43 GPa), and increased symmetry around Eu3+ion with disappeared5D0→7F2transition beyond 5.7 GPa. Our results indicate the potential of the Y2Hf2O7:Eu3+nanoparticles as medium range pressure sensors with tunable luminescence from red to orange to yellow in the pressure range of 0–49.4 GPa.