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Impurity induced mechano-luminescence under different pressure impacts for Mn doped ZnS microcrystals
Optical Materials ( IF 3.8 ) Pub Date : 2021-11-25 , DOI: 10.1016/j.optmat.2021.111798
Pallavi Sharma 1, 2, 3 , Ritu Daipuriya 3 , Alpana Bhagatji 3 , Sachin Tyagi 1, 2 , Sudipta Sarkar Pal 1, 2
Affiliation  

Mechano-luminescence (ML) phenomenon is a non-destructive light generation mechanism with the effect of applied dynamic pressure on the materials. Here in present work, Mechano-luminescence response of Manganese (Mn) doped ZnS microcrystal is measured as a function of applied pressure and Mn concentration. First, ZnS is doped with three concentrations of Mn (0.5 M%, 1.0 M% and 1.5 M%) using solid state reaction mechanism at 1000 °C in an inert Argon atmosphere. The obtained material is characterized with Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and Photo-luminescence (PL) techniques. The core mechano-luminescence (ML) signature of all samples is obtained using a custom designed dynamic vertical pressure impact setup. The pressure range for the experiments is kept from 10 to 400 bar with a gap of 50 bar for each measurement. It has been found that for ZnS:Mn with 1 M% doping concentration shows the highest ML emission intensity in comparison to 0.5 M% and 1.5 M%. It is also observed that ML intensity increases linearly with applied pressure for all three doping concentrations. Author has also discussed the decay time of signal with applied pressure. Results obtained show decrease in decay time for each drop height for all the samples. The current study clearly shows that ZnS:Mn has the ability to be used as an optical pressure sensor matrix material for impact sensor application.



中文翻译:

Mn掺杂ZnS微晶在不同压力冲击下的杂质诱导机械发光

机械发光 (ML) 现象是一种非破坏性的发光机制,其作用是对材料施加动态压力。在目前的工作中,锰 (Mn) 掺杂的 ZnS 微晶的机械发光响应被测量为施加的压力和 Mn 浓度的函数。首先,在惰性氩气氛中,在 1000 °C 下,使用固态反应机制,将 ZnS 掺杂三种浓度的 Mn(0.5 M%、1.0 M% 和 1.5 M%)。获得的材料用扫描电子显微镜 (SEM)、X 射线衍射 (XRD) 和光致发光 (PL) 技术表征。所有样品的核心机械发光 (ML) 特征都是使用定制设计的动态垂直压力冲击设置获得的。实验的压力范围保持在 10 到 400 巴之间,每次测量的间隙为 50 巴。已经发现,与 0.5 M% 和 1.5 M% 相比,掺杂浓度为 1 M% 的 ZnS:Mn 显示出最高的 ML 发射强度。还观察到对于所有三种掺杂浓度,ML 强度随施加的压力线性增加。作者还讨论了信号在施加压力下的衰减时间。获得的结果显示所有样品的每个落差的衰减时间减少。目前的研究清楚地表明,ZnS:Mn 有能力用作冲击传感器应用的光学压力传感器基质材料。作者还讨论了信号在施加压力下的衰减时间。获得的结果显示所有样品的每个落差的衰减时间减少。目前的研究清楚地表明,ZnS:Mn 有能力用作冲击传感器应用的光学压力传感器基质材料。作者还讨论了信号在施加压力下的衰减时间。获得的结果显示所有样品的每个落差的衰减时间减少。目前的研究清楚地表明,ZnS:Mn 有能力用作冲击传感器应用的光学压力传感器基质材料。

更新日期:2021-11-25
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