Modeling polymer dielectric/pentacene interfaces: On the role of electrostatic energy disorder on charge carrier mobility

Nicolas G. Martinelli, Matteo Savini, Luca Muccioli, Yoann Olivier, Frédéric Castet, Claudio Zannoni, David Beljonne, Jérôme Cornil

Research output: Contribution to journalArticlepeer-review

Abstract

Force-field and quantum-chemical calculations are combined to model the packing of pentacene molecules at the atomic level on two polymer dielectric layers (poly(methyl methacrylate) (PMMA) versus polystyrene (PS)) widely used in field-effect transistors and to assess the impact of electrostatic interactions at the interface on the charge mobility values in the pentacene layers. The results show unambiguously that the electrostatic interactions introduce a significant energetic disorder in the pentacene layer in contact with the polymer chains; a drop in the hole mobility by a factor of 5 is predicted with PS chains while a factor of 60 is obtained for PMMA due to the presence of polar carbonyl groups.

Original languageEnglish
Pages (from-to)3254-3261
Number of pages8
JournalAdvanced functional materials
Volume19
Issue number20
DOIs
Publication statusPublished - 23 Oct 2009
Externally publishedYes

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