On the role of moisture in the ageing and restoration processes in ZnS: Cu electroluminophores |
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| Authors: | S.V. Pakeva K.M. Kolentsov |
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| Affiliation: | Sofia University, Faculty of Physics, Anton Ivanov Prospect, 5, 1126 Sofia, Bulgaria;Institute of Solid State Physics, Bulgaria Academy of Sciences, Lenin Prospect 72, 1184 Sofia, Bulgaria |
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| Abstract: | An investigation is carried out on the simultaneous effect of wet atmosphere and exciting electric field on aged electroluminescent ZnS: Cu cells (ELC), due to which a better stability and an increase of brightness up to 30% were registered. A model is proposed for the ageing process in ELC in a dry atmosphere, based on the partial reduction of the second Cu2?xS (0 ? x ? 1) phase, and a model is suggested for the brightness restoration of ELC in wet atmosphere also, based on the partial oxidation of Cu2S. |
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