Speaker
Dr
Souleymane Diallo
(Oak Ridge National Laboratory)
Description
MEH-PPV (poly[2-methoxy-5-(2_-ethylhexyloxy)-1,4-phenylenevinylene] is one of the most common conjugated polymers which continues to be of high interest in the area of polymer-based solar cells research, because of its good thermo-mechanical properties, stability, ease of processing, low-costs etc... We present recent quasi-elastic neutron scattering measurements of this electroluminescent active model system, which document the temperature evolution of the polymer dynamics. The data reveals a highly anharmonic side chain dynamics, which can be described by a stretched exponential function. The possible effects of this non-Debye dynamical behavior on the materials properties will be discussed.
Primary author
Dr
Souleymane Diallo
(Oak Ridge National Laboratory)
