Answers are grounded in this paper and cite their sources.
The effects of treatments such as annealing and the application of copper surface coatings on phosphor grains on the electroluminescent behaviour of quenched ZnS-Cu phosphors have been studied. The brightness-voltage dependence and the brightness waveforms of the quenched phosphors having yellow and red emissions are quite different from those obtained from the usual blue and green ZnS-Cu phosphors and more closely resemble those of the ZnS/Cu-Mn system, with the red centre as the characteristic ion level. D.C. electroluminescence was found to occur only through the red centre.
No takes yet. Share an insight, caveat, or question.
Marshall et al. (1964) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: