Abstract
Role of photo-generated space charges on the memory effect, observed in an iodine-doped conductive polymer / poly(N-vinylcarbazole) (PVK)-trinitrofluorenone (TNF) double-layered system, was investigated by means off voltage-current measurements. The results were consistent with the previous conclusion obtained by the xerographic technique. The memory effect was found to come from space charges formed at the electrode-photoreceptor interface containing iodine. The space charge formation induced apparent barrier height lowering against carrier injection and the magnitude of lowering was about 60 meV. It was also found that injected charges from polymer electrode per unit space charge was more than 2×103.
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