Identification of polymorphs of pentacene

CC Mattheus, J Baas, A Meetsma, JL de Boer, TTM Palstra*, Anne B. Dros, Gert T. Oostergetel

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

278 Citations (Scopus)
80 Downloads (Pure)

Abstract

Pentacene crystallizes in a layered structure with a herringbone arrangement within the layers. The electronic properties depend strongly on the stacking of the molecules within the layers [J. Phys. Chem. B. 106 (2002) 8288]. We have synthesized four different polymorphs of pentacene, identified by their layer periodicity, d(001): 14.1, 14.4, 15.0 and 15.4 Angstrom. Single crystals commonly adopt the 14.1 Angstrom structure, whereas all four polymorphs can be synthesized in thin film form, depending on growth conditions. We have identified part of the unit cell parameters of these polymorphs by X-ray and electron diffraction (ED). The 15.0 and 15.4 X polymorphs transform at elevated temperature to the 14.1 and 14.4 Angstrom polymorphs, respectively. Using SCLC measurements, we determined the mobility of the 14.1 Angstrom polymorph to be 0.2 cm(2)/V s at room temperature. (C) 2002 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Article numberPII S0379-6779(02)00467-8
Pages (from-to)475-481
Number of pages7
JournalSynthetic Metals
Volume138
Issue number3
DOIs
Publication statusPublished - 4-Jul-2003

Keywords

  • pentacene
  • thin film
  • single crystal
  • crystal structure
  • structural transition
  • SCLC
  • THIN-FILMS
  • MOLECULAR-CRYSTALS
  • VAPOR

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