Enhanced mechanoluminescence of ZnS:Mn and red shift at low temperatures

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-02-08 DOI:10.1016/j.optmat.2026.117951

Debendra Timsina , Stephen W. Allison , William A. Hollerman , Firouzeh Sabri

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Abstract

Manganese-doped zinc sulfide (ZnS: Mn) is one of the brightest mechanoluminescing materials. While its mechanoluminescing properties at room-temperature have been widely studied, its behavior at cryogenic temperatures remains underexplored. Here, we report mechanoluminescence measurements of ZnS: Mn at 77 K and compare the results with room-temperature behavior. A ∼200 μm thick layer of ZnS:Mn powder mixed in Sylgard-184 was coated onto a RTV655 disc of 25 mm diameter and 3 mm thickness. Two different configurations were tested. In one case (C1), the impact force was applied directly to the ZnS: Mn coating while in the second configuration (C2) the force was applied to the RTV655 side of the sample. Results show up to a fivefold increase in emission intensity at 77K compared to room temperature behavior and a noticeable red shift in the emission band. When testing under C1, the fast and slow decay times reduced from 129.6 ± 4 μs to 55.5 ± 5.7 μs and from 890.6 ± 150.1 μs to 290.9 ± 25.4 μs, respectively. In C2 the fast decay increased from 38.3 ± 1.7 μs to 82.2 ± 16.1 μs, and the slow decay increased from 318.3 ± 12.8 μs to 357.8 ± 40.6 μs. Under C1, the rise time did not show any temperature dependency. However, under C2, the rise time decreased with decrease in temperature. This study paves the way for a better understanding of temperature dependent mechanoluminescence of ZnS: Mn and designing sensing devices for testing under extreme conditions.

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低温下ZnS:Mn机械发光增强和红移

锰掺杂硫化锌（ZnS: Mn）是最亮的机械发光材料之一。虽然其在室温下的机械发光特性已被广泛研究，但其在低温下的行为仍未得到充分研究。在这里，我们报告了77 K下ZnS: Mn的机械发光测量结果，并将结果与室温行为进行了比较。将混合在Sylgard-184中的ZnS:Mn粉末涂覆在直径25 mm、厚度3 mm的RTV655圆盘上，厚度约为200 μm。测试了两种不同的配置。在一种情况下（C1），冲击力被直接施加到ZnS: Mn涂层上，而在第二种情况下（C2），冲击力被施加到样品的RTV655侧。结果表明，与室温相比，在77K时的发射强度增加了五倍，并且在发射带中出现了明显的红移。在C1下测试时，快、慢衰减时间分别从129.6 ± 4 μs和890.6 ± 150.1 μs降低到55.5 ± 5.7 μs和290.9 ± 25.4 μs。C2的快速衰减从38.3 ± 1.7 μs增加到82.2 ± 16.1 μs，慢速衰减从318.3 ± 12.8 μs增加到357.8 ± 40.6 μs。在C1下，上升时间不表现出温度依赖性。而在C2下，上升时间随温度的降低而减小。该研究为更好地理解ZnS: Mn的温度依赖性机械发光和设计用于极端条件下测试的传感装置铺平了道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.