ZnS:Cu,X(X = Cl,Br,I) ACEL 荧光粉的性质主要决定于 Cu 发光中心的电子发光复合、ZnS 点阵中电子的注入效率、诱捕电子和逃逸电子的比率.热致发光中的电子陷阱依赖于掺杂剂以及荧光粉制备方法.文章描述了 ACEL 荧光粉的退火过程对其电致发光性质的深远影响.从热释光发光曲线上,我们可以看到烧结条件对电子陷阱特征的作用.由于荧光粉的 ACEL 性质与电子陷阱有关,为了提高荧光粉的性能,对电子陷阱的成因和所起的作用的了解就显得尤为重要.%The performance of ZnS: Cu, X (X = Cl, Br, I) ACEL phosphor powders is critically dependent on the efficient injection of charge and the rates of trapping and de-trapping of these charges in the ZnS lat- tice, in addition to radiative recombination of the charges at luminescent Cu centres. The characterisation of the charge traps using thermoluminescence is reported and it is shown how these charge traps depend on the identities of the dopant ions and the synthetic route used in the phosphor preparation. We describe how the thermal annealing history of ACEL phosphor powders critically affects their electroluminescence per- formance. This is shown to be due to the dependence of the characteristics of the electron traps on the fir-ing conditions, as is made evident from their thermally stimulated luminescence curves. As the ACEL per-formance of the phosphors is related to the charge traps (that are characterised by the thermoluminescence experiments) a full understanding of their origin and role is of fundamental importance if the aim is to im-prove phosphor performance.
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