Modeling of Actual-Size Organic Electronic Devices from Efficient Molecular-Scale Simulations

Haoyuan Li, Jean Luc Bredas

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Rational development of organic electronic devices requires a molecular insight into the structure–performance relationships that can be established for the organic active layers. However, the current molecular-scale simulations of these devices are limited to nanometer sizes, well below the micrometer-sized systems that are needed in order to consider actual-scale morphologies and to reliably model low dopant concentrations and trap densities. Here, by enabling descriptions of both the short-range and the long-range electrostatic interactions in master equation simulations, it is demonstrated that reliable molecular-scale simulations can be applied to systems 100 times larger than those previously accessible. This quantum leap in the modeling capability allows us to uncover large inhomogeneities in the charge-carrier distributions. Furthermore, in the case of a blend morphology, charge transport in an actual-scale device is found to behave differently as a function of applied voltage, compared to the case of a uniform film. By including these features in realistic-scale descriptions, this methodology represents a major step into a deeper understanding of the operation of organic electronic devices.

Original languageEnglish (US)
Article number1801460
JournalAdvanced Functional Materials
Volume28
Issue number29
DOIs
StatePublished - Jul 18 2018
Externally publishedYes

Keywords

  • GPU computing
  • kinetic Monte Carlo
  • master equation
  • organic semiconductors
  • self-interaction errors

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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