The effect of photoexcitation of the electrical properties of ZnS:Mn thin-film emitters

Significant distinctions have been observed in the current kinetics and current-voltage characteristics of ZnS: Mn electroluminescent thin-film emitters measured with pulsed photoexcitation in different (blue, red, and infrared) spectral intervals. The results show evidence that a recharge of deep centers related to the zinc and sulfur vacancies takes place in the course of the emitter operation, leading to the formation of space charges in the near-anode and near-cathode regions of the phosphor layer.