Martin, S. J. and Kambili, Agapi and Walker, A. (2003) Temperature and Field Dependence of the Mobility of Highly-Ordered Conjugated Polymer Films. Physical Review B 67 (16), p. 165214.
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Other URL: http://link.aps.org/abstract/PRB/v67/e165214
The transport properties of organic light-emitting diodes in which the emissive layer is composed of highly ordered conjugated polymers have been investigated. We have performed simulations of the current transient response to an illumination pulse via the Monte Carlo approach, and from the transit times we have extracted the mobility of the charge carriers as a function of both the electric field and the temperature. The transport properties of such films are different from their disordered counterparts, with charge carrier mobilities exhibiting only a weak dependence on both the electric field and temperature. We show that for spatially ordered polymer films, this weak dependence arises for thermal energy being comparable to the energetic disorder, due to the combined effect of the electrostatic and thermal energies. The inclusion of spatial disorder, on the other hand, does not alter the qualitative behavior of the mobility, but results in decreasing its absolute value.
|Institutions:||Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||20 Jul 2011 20:58|