Luminescence modulation of the Eu3+ doped Srn+1SnnO3n+1 (n=1, 2, 5, ∞) ceramics based on photochromism and its application in anti-counterfeiting technology
Luminescence modulation of the Eu3+ doped Srn+1SnnO3n+1 (n=1, 2, 5, ∞) ceramics based on photochromism and its application in anti-counterfeiting technology
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DOI：
10.1016/j.ceramint.2020.01.235
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发表时间：
2020-06
影响因子：
5.2
通讯作者：
Jin Tang;Yuexuan Mu;Peng Du;L. Luo
中科院分区：
文献类型：
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作者：
Jin Tang;Yuexuan Mu;Peng Du;L. Luo
Srn+1 SnnO 3 n +1陶瓷的结构和光学性能与n值密切相关。制备了Srn+1 SnnO 3 n +1：Eu ~（3+）（n = 1，2，5，∞）四组份陶瓷，并研究了它们的晶体结构、光致发光、光致变色和发光调制特性。结果表明，Sr_2SnO_4：Eu ~（3+）和Sr_3Sn_2O_7：Eu ~（3+）陶瓷具有良好的光致变色和发光调制性能。经280 nm光照射后，Sr 2SnO 4：Eu 3+陶瓷由最初的白色转变为灰紫色。同时，在优化的辐照波长下，着色Sr 2SnO 4：Eu 3+的发光强度衰减率Δ Idec达到80.8%。通过450 nm的光照射，Eu ~（3+）的发光强度可以完全恢复。Sr_3Sn_2O_7：Eu ~（3+）陶瓷的ΔIdecof达到53.1%，发光强度的降低不能被光照射所弥补，只能被400 °C的高温刺激所弥补。最后，我们成功地制作了一个灵活的膜使用Sr 2SnO 4：Eu 3+和PDMS防伪应用。
The structure and optical properties of Srn+1SnnO3n+1ceramics greatly depend on the n value. Thus, we fabricated four compositions, namely Srn+1SnnO3n+1:Eu3+(n = 1, 2, 5, ∞) ceramics, and their crystal structure, photoluminescence, photochromism and luminesce modulation properties have been investigated. It is found that excellent photochromism and luminesce modulation properties are found in Sr2SnO4:Eu3+and Sr3Sn2O7:Eu3+ceramics. After 280-nm light irradiation, the Sr2SnO4:Eu3+ceramics transform into gray purple from primal white. Meanwhile, luminescence intensity decrement ratio ΔIdecof the colored Sr2SnO4:Eu3+reaches a high value of 80.8% under optimized irradiation wavelength. The decreased luminescence intensity of Eu3+can be completely recovered via 450-nm light irradiation. The ΔIdecof Sr3Sn2O7:Eu3+ceramic reaches 53.1%, and the decreased luminesce intensity can not be covered by light irradiation, only can be covered by a high temperature stimulus at 400 °C. Finally, we successfully fabricated a flexible membrane using Sr2SnO4:Eu3+and PDMS for anti-counterfeiting applications.