Substrate-Induced and Thin-Film Phases: Polymorphism of Organic Materials on Surfaces

Andrew Owen Fletcher Jones, Basab Chattopadhyay, Yves H. Geerts*, Roland Resel

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

An increase or modification of structural order in the vicinity of a solid substrate is known for a wide range of materials. For molecular materials crystallizing on a solid surface it has been observed that new polymorphic forms may exist near the interface with the substrate, which have structures different to those observed in the bulk. Such phases are termed as substrate-induced phases (SIPs). The presence of an SIP in a compound or a class of materials can be of crucial significance in terms of their physical properties. However, the factors that drive such a process are not clearly understood or studied in depth. In this feature article, we review the current state of understanding concerning SIPs, giving examples of systems where SIPs have been observed, discussing their origins, and which questions remain to be answered. The role of the substrate in controlling the growth and subsequent structural order has been discussed in detail and the impact of polymorphism on organic electronic device properties has been addressed. Finally, the origin of SIPs has been correlated with their crystal structures and the differences with respect to the bulk structure are highlighted.

Original languageEnglish
Pages (from-to)2233-2255
JournalAdvanced Functional Materials
Volume26
Issue number14
DOIs
Publication statusPublished - 2016

Keywords

  • Organic electronics
  • Organic thin films
  • Pentacene
  • Polymorphism
  • Substrate-induced phase

ASJC Scopus subject areas

  • Biomaterials
  • Electrochemistry
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Fingerprint Dive into the research topics of 'Substrate-Induced and Thin-Film Phases: Polymorphism of Organic Materials on Surfaces'. Together they form a unique fingerprint.

Cite this