We have prepared several enamine compounds as carrier transport material. These enamine compounds doped in a polymer binder show much higher hole drift mobility compared with common hole transport materials such as triphenylamines and hydrazones. The electric-field and temperature dependences of the hole drift mobility have been analyzed in the framework of Gill's expression and Borsenberger's expression. The enamines show lower activation energy (E_0), narrower distribution of hopping site energy (σ) and hopping distance (∑) compared with those of amine derivatives which are of similar chemical structure. This results successfully explain the difference of drift mobility between the two series of carrier transport materials, amines and enamines.
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