Effect of impurities on pentacene island nucleation

B. R. Conrad, Elba Gomar-Nadal, W. G. Cullen, A. Pimpinelli, T. L. Einstein, E. D. Williams

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

Pentacenequinone (PnQ) impurities have been introduced into a pentacene source material in a controlled manner to quantify the relative effects of the impurity content on the grain boundary structure and thin film nucleation. Atomic force microscopy has been employed to directly characterize by weight films grown by using 0.0%-7.5% PnQ in the source material. Analysis of the distribution of capture zone areas of submonolayer islands as a function of impurity content shows that for a large PnQ content, the critical nucleus size for forming a Pn island is smaller than for a low PnQ content. This result indicates a favorable energy for the formation of Pn-PnQ complexes, which, in turn, suggests that the primary effect of PnQ on Pn mobility may arise from the homogeneous distribution of PnQ defects.

Original languageEnglish (US)
Article number205328
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number20
DOIs
StatePublished - May 27 2008

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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