Sharp-Line Near-Infrared Emission from Tetrahedron-Occupied Ni2+ in Ca2GeO4

被引：20

作者：

Huang, Wenjing ^{[1
]}

Zhang, Jiahui ^{[1
]}

Fan, Jiaqi ^{[1
]}

Chen, Peican ^{[2
]}

Pang, Qi ^{[2
]}

Zhou, Liya ^{[2
]}

Wu, Zhan-chao ^{[3
]}

Hu, Yunrui ^{[1
]}

Zhang, Xinguo ^{[1
]}

机构：

[1] Southern Med Univ, Sch Pharmaceut Sci, Key Lab Drug Metab Res & Evaluat State Drug Adm, Guangdong Prov Key Lab New Drug Screening, Guangzhou 510515, Peoples R China

[2] Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China

[3] Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, Key Lab Opt Elect Sensing & Analyt Chem Life Sci, Key Lab Biochem Anal,Minist Educ, Qingdao 266042, Shandong, Peoples R China

来源：

INORGANIC CHEMISTRY | 2023年 / 62卷 / 33期

关键词：

LUMINESCENT PROPERTIES; PHOSPHOR; CE3+; TB3+; CR3+;

D O I：

10.1021/acs.inorgchem.3c01706

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

As far as we are concerned, the phenomenon of Ni2+ luminescencein tetrahedral coordination has not been reported. For the first time,a new NIR phosphor Ca2GeO4:Ni2+ isdeveloped in this work. It is found that the NIR emission from thisphosphor is a sharp peak attributed to the unusual Ni2+-occupied GeO4 site in the lattice, instead of the conventionalbroadband luminescence of Ni2+ in the octahedrally coordinatedsite. Crystal-field analysis has been applied, and the parameters Dq, B, and & UDelta; are calculated to revealthe relationship between the emission profile and the crystal fieldstrength. The optimal Ni2+ doping concentration is foundto be 1%. Ca2GeO4:Ni2+ provides anefficient sharp-line (fwhm = 16 nm) emission centered at 1164 nm whichoriginates from the (1) T (2) & RARR; (3) T (1) transition with an internalquantum efficiency of 23.1% and a decay lifetime of about 300 & mu;s.This work could provide some new insights to explore novel NIR luminescentmaterials based on transition-metal elements. A new NIR phosphor Ca2GeO4:Ni2+ was developed which provided an efficientsharp-line (fwhm= 16 nm) emission centered at 1164 nm from the (1) T (2) & RARR; (3) T (1) transition, attributed to the unusual Ni2+-occupiedGeO(4) site in the lattice.

引用

页码：13370 / 13377

页数：8

共 30 条

[1] Near-infrared emission Ba3(PO4)2:Mn5+ phosphor and potential application in vivo fluorescence imaging [J].