Abstract
Controlling carrier transport in light emitting polymers is a crucial factor for their efficient use in any organic opto-electronic device. In this work, we demonstrate a novel method of utilizing the interactions between single wall carbon nanotubes (SWNTs) and conjugated polymers to modify the overall mobility of charge carriers within nanotube- polymer nanocomposites. Using a unique, double emitting- organic light emitting diode (DE-OLED) structure, we characterize the hole transport within electroluminescent nanocomposites (nanotubs in poly (m-phenylene vinylene-co- 2,5-dioctoxy-p-phenylene) (PmPV)) and show that devices with chromic tunability can be achieved. This leads naturally to a model for hole transport in SWNT - PmPV blends that provides fundamental insights into the formation of discrete hole traps and the modification to hole mobility. Perhaps more importantly however, these results are suggestive of the significant role that SWNT nanocomposites can play in future organic-based photonic systems such as fully organic optical amplifiers, transistors, and color displays.
Published Version
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