Morphology and molecular orientation of thin-film bis(triisopropylsilylethynyl) pentacene

Jihua Chen, David C. Martin, John E. Anthony

Research output: Contribution to journalArticlepeer-review

91 Scopus citations


As a modification to the insoluble and herringbone-structured pentacene, bis(triisopropylsilylethynyl) (TIPS) pentacene has two bulky side groups, leading to good solubility in common organic solvents and regular π-π stacking arrangements in the crystalline state. Solution processing of TIPS-pentacene thin films was investigated as a function of various process parameters in this work. Electron diffraction results suggested that TIPS-pentacene molecules tended to align with the acene unit edge on to the substrate, touching down with their bulky side groups. In a TIPS-pentacene polycrystalline film, the long axis of individual crystallite is [2 1 0], while the shorter axis is [1 2̄ 0]. High-resolution electron microscopy was used to study the local crystal structure and characteristic defects of TIPS-pentacene thin films. Due to the nonaromatic side groups, TIPS-pentacene was found to be significantly more sensitive to the electron beam (critical dose Jc = 0.05 C/cm2 at 300 kV) than pentacene itself (Jc = 0.2 C/cm2 at 100 kV).

Original languageEnglish
Pages (from-to)1701-1709
Number of pages9
JournalJournal of Materials Research
Issue number6
StatePublished - Jun 2007

ASJC Scopus subject areas

  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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