金属离子Bi^(3+)掺杂Lu_(1-x)O_(3):x%Ho^(3+)荧光粉的发光性能  

Luminescence properties of Bi^(3+)doped Lu_(1-x)O_(3):x%Ho^(3+) metal ion phosphors

作　　者：赵海琴 王林香[1,2,3] 庹娟 叶颖 ZHAO Hai-qin;WANG Lin-xiang;TUO Juan;Ye Ying(College of Physics and Electronic Engineering-Xinjiang Normal University,Urumqi 830054,China;Key Laboratory of Mineral Luminescence and Microstructures-Xinjiang Normal University,Urumqi 830054,China;Laboratory of Novel Light Sources and Micro/Nano-Optics-Xinjiang Normal University,Urumqi 830054,China)

机构地区：[1]新疆师范大学物理与电子工程学院,新疆乌鲁木齐830054 [2]新疆师范大学矿物发光及其微结构重点实验室,新疆乌鲁木齐830054 [3]新疆师范大学新型光源与微纳米光学实验室,新疆乌鲁木齐830054

出　　处：《中国光学》2021年第3期528-535,共8页Chinese Optics

基　　金：新疆维吾尔自治区自然科学基金(No.2017D01A60);新疆维吾尔自治区高校科研计划(No.XJEDU2018Y032)。

摘　　要：采用高温固相法制备了金属离子Bi^(3+)掺杂Lu_(1-x)O_(3):x%Ho^(3+)系列荧光粉,研究了不同浓度Bi^(3+)掺杂Lu_(1-x)O_(3):x%Ho^(3+)荧光粉的晶体结构、Lu_(2)O_(3)基质中Bi^(3+)→Ho^(3+)的能量传递规律及合成粉体的发光性质。X射线衍射结果表明Bi^(3+)、Ho^(3+)掺杂对Lu_(2)O_(3)的立方相结构没有影响。在322 nm激发波长下发射出位于551 nm处Ho^(3+)的~5S_(2)→^(5)I_8跃迁;在551 nm监测下,合成的Ho^(3+)、Bi^(3+)共掺杂Lu_(2)O_(3)荧光粉出现Bi^(3+)的322 nm特征激发峰以及Ho^(3+)的448 nm处的^(5)I_8→^(5)F_1跃迁。当Bi^(3+)掺杂浓度为1.5%时,Bi^(3+)对Ho^(3+)的能量传递最有效,比单掺Ho^(3+)样品发射强度提高了34.8倍。Lu_(98.5%-y)O_(3):1.5%Ho^(3+),y%Bi^(3+)(y=1,1.5,2)样品,随着Bi^(3+)掺杂浓度增加,用980 nm激发比322 nm激发在551 nm处获得的光强分别提高了13.3倍、16.8倍、14.2倍。通过计算得到Bi^(3+)和Ho^(3+)之间的能量传递临界距离为2.979 nm,且Bi^(3+)与Ho^(3+)之间的能量传递是通过偶极-四极相互作用实现的。Bi^(3+)doped Lu1-xO_(3):x%Ho^(3+)metal ion phosphors were prepared using the high-temperature solidphase method.The crystal structures of Bi^(3+)doped Lu1-xO_(3):x%Ho^(3+)phosphors,the Bi^(3+)→Ho^(3+)energy transfer rule in Lu2O_(3) matrix and the luminescent properties of synthetic powders with different doping concentrations were investigated.X-ray diffraction results showed that Bi^(3+)and Ho^(3+)doping had no effect on the cubic phase structure of Lu2O_(3).Lu2O_(3):Ho^(3+),Bi^(3+)phosphor emitted ^(5)S2→^(5)I8 transition of Ho^(3+)at 551 nm under an excitation wavelength of 322 nm,and exhibited ^(1)S_(0)→^(3)P_(1) characteristic transition of Bi^(3+)at 322 nm and ^(5)I8→5F1 transition of Ho^(3+)at 448 nm under an emission wavelength of 551 nm.When the doping concentration of Bi^(3+)was 1.5%,the effect was most effective for the energy transfer of Ho^(3+),which increased by a factor of 34.8 compared to that of the single-doped Ho^(3+)sample.For Lu_(98.5%-y)O_(3):1.5%Ho^(3+),y%Bi^(3+)(y=1,1.5,2),with the increase of Bi^(3+)ions concentration,the luminescence intensity at 551 nm under 980-nm excitation increased by a factor of 13.3,16.8 and 14.2,respectively,compared to that of under 322-nm excitation.The energy transfer critical distance between Bi^(3+)and Ho^(3+)was calculated to be 2.979 nm,and the energy transfer between Bi^(3+)and Ho^(3+)was achieved by dipole-quadrupole interaction.

关 键 词：荧光粉 发光性能 能量传递 多极相互作用 

分 类 号：O482.31[理学—固体物理]