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Liquid Nitrogen Temperature Mechanoluminescence and Persistent Luminescence
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-08-03 , DOI: 10.1002/adfm.202305275 Xueqing Liu 1, 2 , Liangliang Zhang 1 , Dandan Wang 3 , Dengkui Wang 4 , He Shen 3 , Hao Wu 1 , Huajun Wu 1 , Guohui Pan 1 , Zhendong Hao 1 , Feng Liu 2 , Jiahua Zhang 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-08-03 , DOI: 10.1002/adfm.202305275 Xueqing Liu 1, 2 , Liangliang Zhang 1 , Dandan Wang 3 , Dengkui Wang 4 , He Shen 3 , Hao Wu 1 , Huajun Wu 1 , Guohui Pan 1 , Zhendong Hao 1 , Feng Liu 2 , Jiahua Zhang 1
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As novel stress-sensing materials, the reported mechanoluminescence (ML) phosphors work only at or above room temperature. Herein, the ML response to low temperatures (77 K) is extended by employing ultra-shallow traps. Strong ML stimulated by handwriting force followed by persistent luminescence is observed in BaSi2O2N2:Eu2+ (BSON) at 77 K. The UV pre-irradiated BSON can still keep the characteristics of ML with 45% intensity after 300 min. Abundant ultra-shallow traps with depth of ≈0.19 eV are found and revealed to be responsible for the low-temperature ML and persistent luminescence. Manipulation of the ultra-shallow traps is realized by doping Ge, Er, and Ce ions in BSON, leading to significant ML enhancement at 77 K. Together with ML, the ultra-shallow traps also exhibit force memory ability to replicate the pre-applied force pattern simply by afterglow. The finding advances the state-of-the-art in force sensing under low temperature conditions.
中文翻译：
液氮温度机械发光和持续发光
作为新型应力传感材料，所报道的机械致发光（ML）磷光体仅在室温或高于室温下工作。在此，通过采用超浅陷阱延长了 ML 对低温 (77 K) 的响应。在BaSi 2 O 2 N 2 :Eu 2+ (BSON)中在77 K下观察到手写力刺激下的强ML并持续发光。UV预照射的BSON在300分钟后仍能保持45%强度的ML特性。大量深度约为 0.19 eV 的超浅陷阱被发现并被揭示是造成低温 ML 和持久发光的原因。通过在 BSON 中掺杂 Ge、Er 和 Ce 离子来实现对超浅陷阱的操控，从而在 77 K 下显着增强 ML。与 ML 一起，超浅陷阱还表现出力记忆能力，可以复制预先施加的力简单地通过余辉来施加力图案。这一发现推进了低温条件下力传感的最先进技术。
更新日期：2023-08-03
中文翻译：
液氮温度机械发光和持续发光
作为新型应力传感材料，所报道的机械致发光（ML）磷光体仅在室温或高于室温下工作。在此，通过采用超浅陷阱延长了 ML 对低温 (77 K) 的响应。在BaSi 2 O 2 N 2 :Eu 2+ (BSON)中在77 K下观察到手写力刺激下的强ML并持续发光。UV预照射的BSON在300分钟后仍能保持45%强度的ML特性。大量深度约为 0.19 eV 的超浅陷阱被发现并被揭示是造成低温 ML 和持久发光的原因。通过在 BSON 中掺杂 Ge、Er 和 Ce 离子来实现对超浅陷阱的操控，从而在 77 K 下显着增强 ML。与 ML 一起，超浅陷阱还表现出力记忆能力，可以复制预先施加的力简单地通过余辉来施加力图案。这一发现推进了低温条件下力传感的最先进技术。
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