On the luminescence of Ti4+ and Eu3+ in monoclinic ZrO2: high performance optical thermometry derived from energy transfer
On the luminescence of Ti4+ and Eu3+ in monoclinic ZrO2: high performance optical thermometry derived from energy transfer
复制标题
单斜晶系 ZrO2 中 Ti4 和 Eu3 的发光：源自能量转移的高性能光学测温
DOI：
10.1039/c9tc06992e
复制
发表时间：
2020-04
影响因子：
6.4
通讯作者：
Zhang Jiahua
中科院分区：
文献类型：
--
作者：
Pan Guo-Hui;Zhang Liangliang;Wu Huajun;Qu Xuesong;Wu Hao;Hao Zhendong;Zhang Ligong;Zhang Xia;Zhang Jiahua
单斜晶系ZrO_2（m-ZrO_2）由于其低的格位对称性和声子能量而在光子学应用中具有很大的吸引力。在本文中，我们提出了详细的研究在m-ZrO 2中的Ti 4+和Eu 3+的发光性质。鉴于对原始m-ZrO 2中“本征”蓝白发光起源的持续争议，通过表征有意掺杂Ti 4+的m-ZrO 2获得更多光谱信息，通过对Ti 3+等金属离子的发光过程的分析和讨论，证明了[Ti（IV）O 7]中Ti 3 + → O−的电荷转移跃迁是发光的主要原因。10−络合物，因为ZrO 2试剂中含有微量Ti4+杂质。在主体激子和氧-金属电荷转移过程（O2−-Ti4+，O2−-Eu 3+）之间观察到竞争吸收，甚至在两种类型的电荷转移过程之间也观察到竞争吸收，因为在价带顶部共享电子，这极大地影响了吸收和激发过程。确定了不同荧光粉中O2−-Ti4+白蓝或Eu 3+红色发射的宽激发带的光谱分量，并解释了它们随掺杂浓度的演变。以Eu ~（3+）为发光探针，计算出m-ZrO_2：Eu ~（3+）中由本征电荷补偿产生的氧缺陷的能态位置在价带顶以上约2.41 eV。首次在m-ZrO 2：Ti4+，Eu 3+磷光体中观察到从[Ti（IV）O 7]10−络合物到Eu 3+的有效能量转移，这被证明是基于双发射组合策略的高性能比率自参考光学测温材料，其相对灵敏度为1.84%K −1。通过适当的掺杂，不仅可以实现覆盖生理温度范围的光学测温，而且还可以实现高相对灵敏度的光学测温。
Monoclinic ZrO2 (m-ZrO2) is an attractive material for photonic applications due to its low site symmetry and phonon energy. In this paper, we present detailed studies on the luminescence properties of Ti4+ and Eu3+ in m-ZrO2. In view of the continuing controversy over the origin of “intrinsic” white-blue luminescence in pristine m-ZrO2, more spectroscopic information obtained by characterizing m-ZrO2 intentionally doped with Ti4+, Ti3+ and other metal ions and extensive discussions on the general characteristics of different luminescence processes were provided to evidence the luminescence as the Ti3+ → O− charge transfer transition in the [Ti(IV)O7]10− complex due to the trace amount of Ti4+ impurity in ZrO2 reagent. Competitive absorption was observed between host exciton and oxygen–metal charge transfer processes (O2−–Ti4+, O2−–Eu3+), and even between the two types of charge transfer process because of the sharing of electrons at the top of the valence band, which greatly influenced the absorption and excitation processes. The spectral components comprising the broad excitation band of O2−–Ti4+ white-blue or Eu3+ red emissions in different phosphors were identified, and their evolutions with doping concentration were explained. The energy state locations of oxygen defects produced by intrinsic charge compensation in m-ZrO2:Eu3+ were proposed to be ∼2.41 eV above the top of the valence band by using Eu3+ for the luminescent probe. Efficient energy transfer from the [Ti(IV)O7]10− complex to Eu3+ was first observed in m-ZrO2:Ti4+,Eu3+ phosphors, which were demonstrated to be high performance ratiometric self-referencing optical thermometric materials based on the dual-emitting combination strategy, with the relative sensitivity amounting to ∼3.84% K−1. Optical thermometry not only covering the physiological temperature range but also with high relative sensitivity could be achieved upon appropriate doping.
登录
查看更多内容
影响因子：
4.4
作者：
BLASSE, G;BRIL, A
通讯作者：
BRIL, A
影响因子：
3.3
作者：
Shaopeng Wang;S. L. Westcott;Wei Chen
通讯作者：
Shaopeng Wang;S. L. Westcott;Wei Chen
影响因子：
3.3
作者：
G.A.M. Dalhoeven;G. Blasse
通讯作者：
G.A.M. Dalhoeven;G. Blasse
影响因子：
3.5
作者：
A. Foster;V. Sulimov;F. Gejo;A. Shluger;R. Nieminen
通讯作者：
A. Foster;V. Sulimov;F. Gejo;A. Shluger;R. Nieminen
影响因子：
3.9
作者：
J. F. Sarver
通讯作者：
J. F. Sarver