摘要
为了探究稀土离子Er^(3+)在弛豫铁电晶体0.91Pb(Zn_(1/3)Nb_(2/3))O_(3)-0.09PbTiO_(3)中的光谱特性,采用高温溶液法生长了Er^(3+)掺杂0.91Pb(Zn_(1/3)Nb_(2/3))O_(3)-0.09PbTiO_(3)弛豫铁电单晶。测试了样品晶体的紫外-可见-近红外吸收光谱,利用Judd-Ofelt理论计算了吸收光谱中Er^(3+)的7个特征吸收峰的理论振子强度与实验振子强度以及振子强度参数Ω_(t)(t=2,4,6)。分析了Er^(3+)在0.91Pb(Zn_(1/3)Nb_(2/3))O_(3)-0.09PbTiO_(3)弛豫铁电晶体场中的自发辐射跃迁几率A与荧光分支比β,以及理论能级寿命τ。通过计算获得的振子强度参数为:Ω_(2)=1.18×10^(-20) cm^(2),Ω_(4)=0.55×10^(-20) cm^(2),Ω_(6)=0.42×10^(-20) cm^(2),^(4)I_(13/2)与^(4)I_(11/2)的理论能级寿命分别为4.367 ms与3.903 ms。研究结果表明:0.91Pb(Zn_(1/3)Nb_(2/3))O_(3)-0.09PbTiO_(3):Er^(3+)是一种性能优异的发光晶体,结合该晶体原有的电学特性,它有望成为集电-机-光为一体的新型多功能晶体。
The study aims to explore the spectral properties of the rare earth ions Er^(3+) in the ferroelectric crystals 0.91Pb(Zn_(1/3)Nb_(2/3))O_(3)-0.09PbTiO_(3)[abbreviation:PZN-9PT].The analysis was made of the spectral properties of Er^(3+) doped PZN-9PT ferroelectric crystal prepared by the flux method.Its absorption spectra were investigated by using the Judd-Ofelt theory,with the Judd-Ofelt intensity parameters and spectroscopic properties of Er^(3+) in relaxor ferroelectric single crystal PZN-9PT obtained.The main spectroscopic characteristics,including optical transition probabilities,branching ratio and radiative lifetime of Er^(3+) in the crystal PZN-9PT,were determined.The obtained J-O intensity parametersΩ_(t)(t=2,4 and 6)were as follows:Ω_(2)=1.18×10^(-20) cm^(2),Ω_(4)=0.55×10^(-20) cm^(2),Ω_(6)=0.42×10^(-20) cm^(2).The calculated radiative lifetime of ^(4)I_(13/2) and ^(4)I_(11/2 )was 4.367 ms and 3.903 ms,respectively.The results suggest that the Er^(3+):PZN-9PT ferroelectric single crystal proves a new promising luminescent crystal.Combined wtih the excellent electromechanical properties of the host crystals PZN-9PT,it is expected to become a new type of quality multifunctional electrical-mechanical-optical crystal.
作者
张锦
惠增哲
王信哲
韩阿敏
ZHANG Jin;XI Zengzhe;WANG Xinzhe;HAN Amin(School of Material Science and Chemical Engineering,Xi’an Technological University,Xi’an 710021,China;Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices,Xi’an Technological University,Xi’an 710021,China)
出处
《西安工业大学学报》
CAS
2021年第6期621-627,共7页
Journal of Xi’an Technological University
基金
国家自然科学基金(51472197)
西安工业大学校长基金(XAGDXJ16020)。
