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Photoluminescence of Polymethylmethacrylate/(Zn,Cu,Ag)S:Eu 3+ Compositions
Physics of the Solid State ( IF 0.6 ) Pub Date : 2020-07-02 , DOI: 10.1134/s1063783420070240
V. P. Smagin , L. V. Zatonskaya , E. G. Il’ina , E. P. Kharnutova

Abstract

Luminescent (Zn,Cu,Ag)S:Eu3+ nanoparticles (quantum dots, QDs) are synthesized upon decomposition of thioacetamide metal complexes in methylmethacrylate during block polymerization upon heating. The QD formation is confirmed by a corresponding band in the optical absorption spectrum of polymer compositions. Photoluminescence of polymethylmethacrylate/(Zn,Cu,Ag)S:Eu3+ compositions manifests itself as a complex band, related to crystal structure defects formed during doping of ZnS with copper and silver ions, and a set of narrow luminescence bands of Eu3+ ions. The luminescence is excited due to the interband transition and electronic transitions from the valence band to ZnS defect levels and intrinsic energy absorption by Eu3+ ions. The bond between Eu3+ ions and ZnS particles is confirmed by the dependence of the ZnS broadband luminescence intensity on the Eu3+ ion concentration and the increase in the intensity of the narrowband luminescence of Eu3+ ions as a result of energy transfer from the doped ZnS crystal levels to the energy levels of Eu3+ ions.


中文翻译:

聚甲基丙烯酸甲酯/(Zn,Cu,Ag)S:Eu 3+组合物的光致发光

摘要

发光(Zn,Cu,Ag)S:Eu 3+纳米粒子(量子点,量子点)是在加热时嵌段聚合过程中在甲基丙烯酸甲酯中硫代乙酰胺金属配合物分解后合成的。通过聚合物组合物的光吸收光谱中的相应带确认了QD的形成。聚甲基丙烯酸甲酯/(Zn,Cu,Ag)S:Eu 3+组合物的光致发光表现为复杂的能带,与铜和银离子掺杂ZnS期间形成的晶体结构缺陷以及一组窄的Eu 3发光带有关+离子。由于带间跃迁以及从价带到ZnS缺陷能级的电子跃迁以及Eu 3+的固有能量吸收,激发了发光离子。的Eu之间的键3+离子和ZnS颗粒是由硫化锌宽带发光强度对Eu的依赖证实3+离子浓度,并增加Eu的窄带发光的强度3+作为从能量转移的结果离子掺杂的ZnS晶体能级达到Eu 3+离子的能级。
更新日期:2020-07-02
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