Alkaline-Earth-Metal-Ions Blending Enhanced Self-Activated and Bi3+-Activated Mechanoluminescence from Ca1-xBaxZnOS,Advanced Functional Materials

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Alkaline-Earth-Metal-Ions Blending Enhanced Self-Activated and Bi3+-Activated Mechanoluminescence from Ca1-xBaxZnOS
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-09-07 , DOI: 10.1002/adfm.202207881
Jingna Jia ₁ , Xuwen Gao ₁ , Guizheng Zou ₁

Affiliation

The self-activated mechanoluminescence (ML) of oxysulfides MZnOS (M = Ca, Sr, Ba) is very weak, and bright ML from these hosts is usually achieved with activator-doping strategy. Herein, a promising alkaline-earth-metal-ion blending strategy, instead of activator doping, is proposed to achieve intense and self-activated ML from MZnOS. Upon partially substituting the Ca²⁺ of CaZnOS with Ba²⁺ and vice versa, intense and eye-visible ML is achieved via exerting a small mechanical stimulus of 2 N onto the obtained Ca_1-xBa_xZnOS (0 < x < 1). The luminescence center for ML of Ca_1-xBa_xZnOS is intrinsic oxygen vacancy, so that Ca_1-xBa_xZnOS can give off efficient and self-activated ML. Under optimum conditions, the maximum ML emission of Ca_0.84Ba_0.16ZnOS is about 50-folds and 170-folds to that of CaZnOS and BaZnOS, respectively. Promisingly, Bi³⁺ can be incorporated into the lattice of Ca_1-xBa_xZnOS, transferring ML center from the oxygen defects of Ca_1-xBa_xZnOS to the activator of Ca_0.96-xBa_xZnOS:Bi_0.04, and eventually enable further enhanced ML by about twofolds. This alkaline-earth-metal-ion blending strategy can also enhance Bi³⁺-activated ML from M_0.96ZnOS:Bi_0.04, the maximum emission for ML of Ca_0.80Ba_0.16ZnOS:Bi_0.04 is 36-folds and 38 folds to that of Ca_0.96ZnOS:Bi_0.04 and Ba_0.96ZnOS:Bi_0.04, respectively. This work opens an avenue to develop new ML hosts and luminophores with efficient emission.

中文翻译：

碱土金属离子混合增强 Ca1-xBaxZnOS 的自激活和 Bi3+ 激活机械发光

氧硫化物 MZnOS (M = Ca, Sr, Ba) 的自激活机械发光 (ML) 非常弱，这些主体的明亮 ML 通常是通过激活剂掺杂策略实现的。在此，提出了一种有前途的碱土金属离子混合策略，而不是活化剂掺杂，以从 MZnOS 实现强烈的自活化 ML。^{在用 Ba 2+}部分取代CaZnOS的 Ca ²⁺后，通过在获得的 Ca _1-x Ba _x ZnOS (0 < x < 1 ）。_{Ca 1-x} Ba _x ZnOS ML 的发光中心是固有氧空位，因此 Ca _1-x Ba_x ZnOS 可以释放出高效和自激活的 ML。_{在最佳条件下，Ca 0.84} Ba _0.16 ZnOS的最大ML发射分别是CaZnOS和BaZnOS的50倍和170倍。很有希望的是，Bi ³⁺可以结合到 Ca _1-x Ba _x ZnOS 的晶格中，将 ML 中心从 Ca _1-x Ba _x ZnOS 的氧缺陷转移到 Ca _0.96-x Ba _x ZnOS:Bi _0.04的活化剂上，并最终使机器学习进一步增强约两倍。这种碱土金属离子混合策略还可以从 M _{0.96增强 Bi}^{3+活化的 ML}ZnOS:Bi _{0.04 ，Ca}_0.80 Ba _0.16 ZnOS:Bi _0.04 ML的最大发射分别是Ca _0.96 ZnOS:Bi _0.04和Ba _0.96 ZnOS:Bi _0.04的36倍和38倍。这项工作为开发新的具有高效发射的 ML 主体和发光体开辟了道路。

更新日期：2022-09-07

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