Intense red photoluminescence and mechanoluminescence from Mn2+-activated SrZnSO with a layered structure†,Journal of Materials Chemistry C

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Intense red photoluminescence and mechanoluminescence from Mn2+-activated SrZnSO with a layered structure†
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2019-05-31 00:00:00 , DOI: 10.1039/c9tc02504a
Yu Zhou _{1,

2,

3,

4} , Yun-Ling Yang _{1,

2,

3,

4} , Yu-Ting Fan _{1,

2,

3,

4} , Woochul Yang _{5,

6,

7,

8} , Wei-Bin Zhang _{4,

9,

10,

11} , Jian-Feng Hu _{1,

2,

3,

4} , Zhi-Jun Zhang _{1,

2,

3,

4,

5} , Jing-Tai Zhao _{1,

2,

3,

4}

Affiliation

A series of novel red emitting Mn²⁺-activated SrZnSO phosphors were successfully synthesized by solid-state reaction at high temperature. The photoluminescence (PL) and mechanoluminescence (ML) properties of these Mn²⁺-activated SrZnSO phosphors with different Mn²⁺ concentrations were investigated. With increasing the concentration of Mn²⁺ from x = 0 to 0.04, the unit cell volume increased from 153.82 to 154.19 Å³ while the optical band gap decreased from 3.74 to 3.43 eV. The site occupation of Mn²⁺ in the host lattice was demonstrated by Rietveld refinement, the electron paramagnetic resonance (EPR) spectrum, and the spectroscopic properties. A broad band emission peak at 603 nm of SrZn_1−xMn_xSO (0.001 ≤ x ≤ 0.04) with an excitation wavelength of 318 nm was attributed to electronic transitions of Mn²⁺ from the ⁴T₁(⁴G) level to the ⁶A₁(⁶S) level. The lifetime of SrZn_1−xMn_xSO (0.001 ≤ x ≤ 0.04) decreased monotonously from 2.97 to 0.82 ms with increasing Mn²⁺ concentration. In particular, intense emission of red light from SrZn_1−xMn_xSO (0.001 ≤ x ≤ 0.04) under compressive load could be observed even with the naked eye, indicating that SrZn_1−xMn_xSO could be used for stress sensors or stress imaging. There was a linear correlation between the ML intensity and external load in SrZn_1−xMn_xSO, and the ML intensity could be recovered under UV light irradiation. Considering its advantages of non-destruction, reproducibility, and high ML intensity, SrZn_1−xMn_xSO might be useful for non-destructive detection of stress.

中文翻译：

Mn ²⁺激活的具有层状结构的SrZnSO的强烈红色光致发光和机械致发光†

通过高温固相反应成功地合成了一系列新型的发红光的Mn ²⁺激活的SrZnSO荧光粉。研究了这些具有不同Mn ²⁺浓度的Mn ²⁺激活的SrZnSO荧光粉的光致发光（PL）和机械致发光（ML）特性。随着Mn的浓度²⁺从X = 0至0.04，晶胞体积从153.82增加至154.19埃³，而光学带隙从3.74下降到3.43电子伏特。Mn ^2+的占位Rietveld精炼，电子顺磁共振（EPR）光谱和光谱性质证明了主晶格中的碳原子。在603纳米的宽波段发射峰SrZn _{1- X}的Mn _X SO（0.001≤ X ≤0.04），用318纳米的激发波长是由于锰的电子跃迁²⁺从⁴ Ť ₁（⁴ G）电平，以的⁶阿₁（⁶ S）水平。的SrZn寿命_{1- X}的Mn _X SO（0.001≤ X ≤0.04）从2.97到0.82毫秒单调减少随着锰²⁺专注。在从红色光的特定的，激烈的发射SrZn _{1- X}的Mn _X SO（0.001≤ X ≤0.04）压缩负载下甚至可以用肉眼观察到，这表明SrZn _{1- X}锰_X可用于应力传感器SO或压力成像。SrZn _{1- x} Mn _x SO中的ML强度与外部负荷之间存在线性关系，并且在UV光照射下可以恢复ML强度。考虑到其无损，可重复性和高ML强度的优势，SrZn _{1- x} Mn _x SO可能对应力的无损检测有用。

更新日期：2019-05-31

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