A degradation mechanism of organic light-emitting devices
By Aziz, H. & Xu, G.
Published in Synthetic Metals
NULL
1996
Abstract
A novel mechanism is revealed for the degradation and failure of the recently developed organic light-emitting device (OLED) made of indium-tin oxide (ITO)/poly(p-phenylenevinylene)/aluminum (or magnesium). A main obstacle to obtaining a long lifetime for these devices is found to be the electrochemical reaction on interfaces of both electron and hole injecting electrodes. As a result, the electrode materials are not only degraded, but they also form a complex with the bulk polymer which serves as a 'weak electrolyte’.
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