Sensitizing effect of Nd^(3+) on Tb^(3+) activated ZrP_(2)O_(7) long persistent phosphor materials  

作　　者：Meihua Wu Wen Chen Siyuan Liu Yichao Sun Lingfeng Huang Guoliang Chen Zishan Zheng 

机构地区：[1]School of Chemistry,Chemical Engineering&Environment,Minnan Normal University,Zhangzhou 363000,China

出　　处：《Journal of Rare Earths》2021年第7期757-764,I0001,共9页稀土学报（英文版）

基　　金：Project supported by the Guiding Project of Science and Technology Department of Fujian Province(2019N0016);Key Project of Advanced Industry of Science and Technology Department of Fujian Province(2017Y0067);the Foundation of Education Department of Fujian Province(JT180293);Natural Science Foundation of Zhangzhou Science&Technology Bureau(2017G02010028)。

摘　　要：The long persistent phosphors of Zr_(0.97)P_(2)O_(7):0.018 Tb^(3+),0.012 Nd^(3+)with Nd^(3+)as sensitized ions and Tb^(3+)as emission centers were synthesized using high temperature solid state reaction.The crystal structure and defects,excitation and emission spectra,decay curves and thermoluminescence(TL) curves of the phosphors were investigated.The synthesized Zr_(0.97)P_(2)O_(7):0.018 Tb^(3+),0.012 Nd^(3+)is essentially in line with the standard card PDF#49-1079.The emission band with main peak at 548 nm exhibits the characteristic transitions of ^(5)D_(3)-^(7)F_(j)(j=5,4) and ^(5)D_(3)-^(7)F_(j)(j=6,5,4,3) of Tb^(3+).The analysis of excitation and emission spectra shows that there exists the overlap between the emission peaks of Nd^(3+)at 466 and 485 nm and the excitation of Tb^(3+)at 443 and 485 nm,and the energy transfer from Nd^(3+)to Tb^(3+)plays an important role in the improvement of luminescence properties.The decay curves shows that Zr_(0.97)P_(2)O_(7):0.018 Tb^(3+),0.012 Nd^(3+)has longer afterglow time than ZrP_(2)O_(7) and Zr_(0.982)P_(2)O_(7):0.018 Tb^(3+).Additionally,the TL curves indicate that the trap depth at 0.72 eV in Zr_(0.97)P_(2)O_(7):0.018 Tb^(3+),0.012 Nd^(3+)is to the benefit of the afterglow time.The possible luminescence mechanism of ZrP_(2)O_(7):Tb^(3+),Nd^(3+)is proposed on the basis of the XPS spectra,EPR spectra,excitation and emission spectra,decay curves,TL curves and the analysis of defect equations.

关 键 词：ZrP_(2)O_(7) Tb^(3+) Nd^(3+) SENSITIZER Energy transfer Rare earths 

分 类 号：TQ422[化学工程]