Thin-Film Organic Heteroepitaxy

Jordan T. Dull, Xu He, Jonathan Viereck, Qianxiang Ai, Ritika Ramprasad, Maria Clara Otani, Jeni Sorli, Jason W. Brandt, Brad P. Carrow, Arthur D. Tinoco, Yueh Lin Loo, Chad Risko, Sylvie Rangan, Antoine Kahn, Barry P. Rand

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Incorporating crystalline organic semiconductors into electronic devices requires understanding of heteroepitaxy given the ubiquity of heterojunctions in these devices. However, while rules for commensurate epitaxy of covalent or ionic inorganic material systems are known to be dictated by lattice matching constraints, rules for heteroepitaxy of molecular systems are still being written. Here, it is found that lattice matching alone is insufficient to achieve heteroepitaxy in molecular systems, owing to weak intermolecular forces that describe molecular crystals. It is found that, in addition, the lattice matched plane also must be the lowest energy surface of the adcrystal to achieve one-to-one commensurate molecular heteroepitaxy over a large area. Ultraviolet photoelectron spectroscopy demonstrates the lattice matched interface to be of higher electronic quality than a disordered interface of the same materials.

Original languageEnglish (US)
Article number2302871
JournalAdvanced Materials
Volume35
Issue number35
DOIs
StatePublished - Sep 1 2023

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • General Materials Science

Keywords

  • crystal growth
  • heteroepitaxy
  • organic materials
  • small molecules

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