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Two different wall charge evolution models, i.e., reversion and accumulation models, were proposed incorporating the phenomenon of secondary electron emission during the glow discharges of alternating current-PDPs. Based on the wall charge evolution models, theoretical analyses on exoelectron emission kinetics were conducted, and the effects of initial electron concentration trapped and temperature on the exoelectron currents were predicted. The theoretical prediction was compared with the currents measured experimentally. The theoretical analyses and experimental observations suggest that wall charge evolution model and the first- and second-order reaction kinetics may represent the wall charge formation and exoelectron emission from MgO layer of ac-PDPs.