Abstract
We studied the hole injection and transporting properties of four phenylamine-based
hole-transporters useful for organic light-emitting diodes. The hole-transporting
properties were examined in details by time-of-flight technique whereas their
hole-injecting properties by current–voltage measurements and dark-current
space-charge-limited-current technique (DI-SCLC). All materials were found
to exhibit essentially trap-free hole transports. We discovered that a conducting
polymeric anode, PEDOT:PSS, can act effectively as an Ohmic contact for hole
injection into the PA compounds for DI-SCLC experiments.
© 2007 IEEE
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