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Modeling space charge in alternating-current thin-film electroluminescent devices using a single-sheet charge model

TitleModeling space charge in alternating-current thin-film electroluminescent devices using a single-sheet charge model
Publication TypeJournal Article
Year of Publication1995
AuthorsKeir, P. D., W. M. Ang, and J. F. Wager
JournalJournal of Applied Physics
Volume78
Issue7
Pagination4668
Date Published1995
ISSN00218979
Keywordsalternating current, deep energy levels, display devices, electroluminescence, impact phenomena, ionization, manganese additions, simulation, space charge, thin films, zinc sulfides
Abstract

A simulation of alternating‐current thin‐film electroluminescent device operation with positive space charge present in the phosphor layer of the device is presented. The simulation is based on modeling the space‐charge distribution using a single‐sheet charge model. The simulation is performed for two cases of space‐charge creation: by impact ionization of deep levels in the phosphor or by field emission from traps in the phosphor. Results of the simulation show that space‐charge creation by either mechanism is capable of causing overshoot in both capacitance‐voltage and internal charge‐phosphor field (Q‐Fp) plots.

DOI10.1063/1.359814
Short TitleJ. Appl. Phys.