Abstract
From experimental time dependences of the instantaneous brightness and the total current passing through a ZnS: Mn thin-film electroluminescent device, capacitance-voltage, charge-voltage, and current-voltage characteristics of the device are calculated. Conditions for negative differential resistance (NDR) of S and N types are found. An NDR mechanism that exploits the ionization and the recharge of deep donors and acceptors (zinc and sulfur vacancies) with the formation of space charge at the cathodic and anodic interfaces of the phosphor is suggested.
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