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Interface-Mediated Mechanoluminescence Enhancement from Heterojunction Phosphors: Experiment and Theory
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-06-12 , DOI: 10.1021/acsami.3c01282 Ci Wang 1 , Hai-Zheng Shi 1 , Wen-Hao Li 1 , Qing-Miao Hu 2 , Lu Liu 1 , Jing Ren 1 , Jianzhong Zhang 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-06-12 , DOI: 10.1021/acsami.3c01282 Ci Wang 1 , Hai-Zheng Shi 1 , Wen-Hao Li 1 , Qing-Miao Hu 2 , Lu Liu 1 , Jing Ren 1 , Jianzhong Zhang 1
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Mechanoluminescence (ML) phosphors have made significant progress in various fields, such as artificial intelligence, the Internet of Things, and biotechnology. However, enhancing their weak ML intensity still remains a challenge. Here, we report a new series of Na1–xMgxNbO3:Pr3+ (x = 0.00, 0.10, 0.20, 0.40, 0.60, 0.80, and 1.00 mol %) heterojunction systems, which exhibit significant ML enhancement as compared with either the Pr3+-doped NaNbO3 or MgNbO3, and the physical mechanisms behind the ML enhancement have been explored comprehensively from both the experiment and theory points of view. Experimental tests, including thermoluminescence and positron annihilation lifetime measurements, combined with first-principles calculations, consistently indicate that the ML enhancement observed in these newly reported systems is due to the formation of heterojunctions, which plays a crucial role in modulating the defect configuration of the phosphors and facilitating efficient charge transfer. By controlling the Na/Mg ratio in conjunction with Pr3+ doping, continuous changes in the band offset and the concentrations of certain types of traps in the forbidden gap are achieved, leading to the optimum conditions in the 8/2 ratio samples. These findings demonstrate a novel type of ML phosphor and provide a theoretical basis for the design of high-performance ML phosphor.
中文翻译：
异质结荧光粉界面介导的机械发光增强：实验与理论
机械发光（ML）荧光粉在人工智能、物联网和生物技术等各个领域取得了重大进展。然而，增强其较弱的机器学习强度仍然是一个挑战。在这里，我们报告了一系列新的 Na 1 –x Mg x NbO 3 :Pr 3+ ( x = 0.00、0.10、0.20、0.40、0.60、0.80 和 1.00 mol %) 异质结系统，与相比，该系统表现出显着的ML增强与 Pr 3+掺杂的 NaNbO 3或 MgNbO 3，并且从实验和理论的角度全面探讨了机器学习增强背后的物理机制。包括热释光和正电子湮灭寿命测量在内的实验测试，与第一性原理计算相结合，一致表明，在这些新报道的系统中观察到的ML增强是由于异质结的形成，异质结在调节缺陷构型方面发挥着至关重要的作用。荧光粉并促进有效的电荷转移。通过与 Pr 3+结合控制 Na/Mg 比例掺杂、能带偏移的连续变化以及禁带中某些类型陷阱的浓度得以实现，从而在 8/2 比例样品中达到最佳条件。这些发现展示了一种新型的ML荧光粉，并为高性能ML荧光粉的设计提供了理论基础。
更新日期：2023-06-12
中文翻译：
异质结荧光粉界面介导的机械发光增强：实验与理论
机械发光（ML）荧光粉在人工智能、物联网和生物技术等各个领域取得了重大进展。然而，增强其较弱的机器学习强度仍然是一个挑战。在这里，我们报告了一系列新的 Na 1 –x Mg x NbO 3 :Pr 3+ ( x = 0.00、0.10、0.20、0.40、0.60、0.80 和 1.00 mol %) 异质结系统，与相比，该系统表现出显着的ML增强与 Pr 3+掺杂的 NaNbO 3或 MgNbO 3，并且从实验和理论的角度全面探讨了机器学习增强背后的物理机制。包括热释光和正电子湮灭寿命测量在内的实验测试，与第一性原理计算相结合，一致表明，在这些新报道的系统中观察到的ML增强是由于异质结的形成，异质结在调节缺陷构型方面发挥着至关重要的作用。荧光粉并促进有效的电荷转移。通过与 Pr 3+结合控制 Na/Mg 比例掺杂、能带偏移的连续变化以及禁带中某些类型陷阱的浓度得以实现，从而在 8/2 比例样品中达到最佳条件。这些发现展示了一种新型的ML荧光粉，并为高性能ML荧光粉的设计提供了理论基础。
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