Electroluminescent composites have considerable potential for applications in photoelectric display, electric field measurement and other fields due to their advantages of simple preparation and uniform luminescence. However, high voltage required by the operation of electroluminescent composites hinders their applications in the electric domain, and research on the relationship between electroluminescence principle of composites and filler intrinsic attributes is insufficient. In this paper, the effects of electric field strength, filler mass fraction and voltage frequency on the electroluminescence intensity of ZnS:Cu/epoxy composites are studied, which are majorly used as the luminescent layer of electroluminescent devices. To enhance the electroluminescence intensity of composites, high-temperature sintered BaTiO₃ and zinc oxide whiskers (ZnOw) particles are introduced in the base matrix. The finite element method is applied to verify that the matrix of high dielectric constant is in favour of improving the electroluminescence intensity of composites. The band structure of the ZnS:Cu particle is calculated based on the density functional theory + U method to analyse the intrinsic relationship between electroluminescence and particle electronic structure. This paper provides a basis for the research of high electroluminescence intensity devices and will be conducive to better understanding on the relationship between electroluminescence principle and filler intrinsic attributes.

中文翻译：

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通过探索电致发光强度与填料本征属性之间的关系优化 ZnS: Cu/环氧复合材料的电致发光性能

电致发光复合材料以其制备简单、发光均匀等优点在光电显示、电场测量等领域具有相当大的应用潜力。然而，电致发光复合材料运行所需的高电压阻碍了其在电学领域的应用，复合材料的电致发光原理与填料本征属性之间的关系研究不足。本文研究了电场强度、填料质量分数和电压频率对主要用作电致发光器件发光层的ZnS:Cu/环氧树脂复合材料电致发光强度的影响。为提高复合材料的电致发光强度，高温烧结BaTiO ₃和氧化锌晶须 (ZnOw) 颗粒被引入基础基质中。应用有限元法验证高介电常数基体有利于提高复合材料的电致发光强度。基于密度泛函理论+U法计算ZnS:Cu粒子的能带结构，分析电致发光与粒子电子结构的内在关系。该论文为高电致发光强度器件的研究提供了基础，将有助于更好地理解电致发光原理与填料本征属性之间的关系。