First observation of mutual energy transfer of Mn4+–Er3+via different excitation in Gd2ZnTiO6:Mn4+/Er3+ phosphors,Journal of Materials Chemistry C

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First observation of mutual energy transfer of Mn4+–Er3+via different excitation in Gd2ZnTiO6:Mn4+/Er3+ phosphors
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2017-08-16 00:00:00 , DOI: 10.1039/c7tc03045b
Jinsheng Liao _{1,

2,

3,

4} , Qi Wang _{1,

2,

3,

4} , He-Rui Wen _{1,

2,

3,

4} , Huali Yuan _{1,

2,

3,

4} , Sui-Jun Liu _{1,

2,

3,

4} , Junxiang Fu _{1,

2,

3,

4} , Bao Qiu _{5,

6,

7,

8,

9}

Affiliation

Mutual energy transfer between rare earth ions and transition metal ions in a single luminescence material easily achieves multifunctions by altering the excitation wavelength. In this study, we first observe the mutual energy transfer process between Mn⁴⁺ and Er³⁺via different excitations in Mn⁴⁺–Er³⁺ co-doped Gd₂ZnTiO₆ phosphors synthesized by a high temperature solid-state reaction. During the downshift energy transfer from Mn⁴⁺ to Er³⁺, the Gd₂ZnTiO₆:Mn⁴⁺/Er³⁺ phosphor exhibits a strong near-infrared emission around 1529 nm with a wide excitation band extending from 250 to 550 nm. Based on Dexter's theory, the energy transfer mechanism mainly contributes to a dipole–dipole interaction between Mn⁴⁺ and Er³⁺ ions, which is responsible for the greatly enhanced emission at 1529 nm. Upon the upconversion energy transfer from Er³⁺ to Mn⁴⁺, the Gd₂ZnTiO₆:Mn⁴⁺/Er³⁺ phosphor shows a deep red emission of Mn⁴⁺ under 980 nm laser excitation. The energy transfer process from Er³⁺ to Mn⁴⁺ is fully demonstrated by variations in excitation power as well as luminescence lifetimes of 551 nm emission of Er³⁺. Two-photon processes and resonance energy transfer from Er³⁺ to Mn⁴⁺ are required to populate the ²E emitting level of Mn⁴⁺.

中文翻译：

首次观察到Gd ₂ ZnTiO ₆：Mn ⁴⁺ / Er ³⁺荧光粉中通过不同激发引起的Mn ⁴⁺ –Er ³⁺相互能量转移

单一发光材料中稀土离子和过渡金属离子之间的相互能量转移可以通过改变激发波长轻松实现多功能。在这项研究中，我们首先观察了通过高温固态反应合成的Mn ⁴⁺ –Er ³⁺共掺杂的Gd ₂ ZnTiO ₆荧光粉中Mn ⁴⁺和Er ^3+之间通过不同激发而发生的相互能量转移过程。在从Mn ⁴⁺到Er ³⁺的降档能量转移过程中，Gd ₂ ZnTiO ₆：Mn ⁴⁺ / Er ³⁺磷光体在1529 nm附近表现出很强的近红外发射，并具有从250 nm到550 nm的宽激发带。根据德克斯特（Dexter）的理论，能量转移机制主要有助于Mn ⁴⁺和Er ³⁺离子之间的偶极-偶极相互作用，这是导致1529 nm处发射强度大大提高的原因。在从Er ³⁺到Mn ⁴⁺的上转换能量转移时，Gd ₂ ZnTiO ₆：Mn ⁴⁺ / Er ³⁺荧光粉在980 nm激光激发下显示出深红色发射的Mn ⁴⁺。从Er ³⁺到Mn ⁴⁺的能量转移过程激发功率的变化以及Er ³⁺的551 nm发射的发光寿命充分证明了这一点。双光子工艺和选自Er共振能量转移³⁺与Mn ⁴⁺需要填充²的Mn电子发射水平⁴⁺。

更新日期：2017-09-14

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