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Reversible post-breakdown conduction in aluminum oxide-polymer capacitors

Du, Qian Du ; Gomes, H.L.

Applied Physics Letters Vol. 102, Nº 15, pp. 153509 - 153509-4, May, 2013.

ISSN (print): 1077-3118
ISSN (online): 0003-6951

Scimago Journal Ranking: 2,15 (in 2013)

Digital Object Identifier: 10.1063/1.4802485

Abstract
luminum/Al 2 O 3/polymer/metal capacitors submitted to a low-power constant current stress undergo dielectric breakdown. The post-breakdown conduction is metastable, and over time the capacitors recover their original insulating properties. The decay of the
conduction with time follows a power law (1/t) α. The magnitude of the exponent α can be raised by application of an electric field and lowered to practically zero by optical excitation of the polyspirofluorene polymer. The metastable conduction is attributed to formation of