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Enhancing the Photoluminescence Property of Pr3+ Ions by Understanding the Polymorphous Influence of the K3Lu(PO4)2 Host
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-09-23 , DOI: 10.1021/acs.inorgchem.1c02368
Xiangyu Han 1 , Jiaming Wu 1 , Changqing Hu 1 , Qingchun Yang 1 , Chengrui Xin 1 , Shuxian Wang 1 , Zhengmao Ye 1
Affiliation  

Adjusting the local coordination environment of lanthanide luminescent ions is a useful method to manipulate the relevant photoluminescence (PL) property. K3Lu(PO4)2 is a phase-change material, and according to the stable temperature range from low to high, the related polymorphs are phase I [P21/m, coordination number (CN) of Lu3+ = 7], phase II (P21/m, CN = 6), and phase III (P3̅, CN = 6), respectively. Based on the temperature-dependent PL analysis of K3Lu(PO4)2:Pr3+, we find that Pr3+ ions occupy the noninversion sites (Cs) in the two low-temperature phases but preferentially enter into the inversion ones (C3i) in phase III. Compared to Pr3+-doped phase I (78 K), Pr3+ ions in phase III (300 K) manifest a weaker fluorescence intensity (170-fold lower). To enhance the room-temperature PL property of K3Lu(PO4)2:Pr3+, a polymorphous adjustment strategy was proposed by the use of the ion-doping method. By introducing the Gd3+ ions into the lattice, Pr3+-doped phase I is successfully stabilized to room temperature, manifesting a 27-fold fluorescence increase in comparison to K3Lu(PO4)2:Pr3+ (0.1 at. %). The finding discussed in this study highlights the significance of site engineering for luminescent ions and also presents the application value of phase-change hosts in the development of high-performance luminescent materials.

中文翻译:

通过了解 K3Lu(PO4)2 主体的多晶型影响来增强 Pr3+ 离子的光致发光特性

调整镧系发光离子的局部配位环境是操纵相关光致发光 (PL) 特性的有用方法。K 3 Lu(PO 4 ) 2是一种相变材料,根据稳定的温度范围从低到高,相关的多晶型为I相[ P 2 1 / m,Lu 3+ 的配位数(CN) = 7],阶段II(P 2 1 / m,CN = 6)和阶段III(P 3̅,CN = 6)分别。基于 K 3 Lu(PO 4 ) 2 :Pr的温度相关 PL 分析3+,我们发现Pr 3+离子在两个低温相中占据非反转位点(C s),但在相III 中优先进入反转位点(C 3 i)。与 Pr 3+掺杂的 I 相 (78 K) 相比,III 相 (300 K) 中的Pr 3+离子表现出较弱的荧光强度(低 170 倍)。为了提高K 3 Lu(PO 4 ) 2 :Pr 3+的室温PL性能,提出了一种采用离子掺杂方法的多晶型调整策略。通过将 Gd 3+离子引入晶格,Pr 3+掺杂的 I 相成功地稳定到室温,与 K 3 Lu(PO 4 ) 2 :Pr 3+ (0.1 at. %)相比,显示出 27 倍的荧光增加。本研究讨论的发现突出了发光离子位点工程的重要性,也展示了相变主体在高性能发光材料开发中的应用价值。
更新日期:2021-10-04
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