Langmuir-Blodgett Thin Films of Diketopyrrolopyrrole-Based Amphiphiles

Chi Kin Lo, Cheng Yin Wang, Stefan D. Oosterhout, Zilong Zheng, Xueping Yi, Canek Fuentes-Hernandez, Franky So, Veaceslav Coropceanu, Jean Luc Brédas, Michael F. Toney, Bernard Kippelen, John R. Reynolds

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We report on two π-conjugated donor-acceptor-donor (D-A-D) molecules of amphiphilic nature, aiming to promote intermolecular ordering and carrier mobility in organic electronic devices. Diketopyrrolopyrrole was selected as the acceptor moiety that was disubstituted with nonpolar and polar functional groups, thereby providing the amphiphilic structures. This structural design resulted in materials with a strong intermolecular order in the solid state, which was confirmed by differential scanning calorimetry and polarized optical microscopy. Langmuir-Blodgett (LB) films of ordered mono- and multilayers were transferred onto glass and silicon substrates, with layer quality, coverage, and intermolecular order controlled by layer compression pressure on the LB trough. Organic field-effect transistors and organic photovoltaics devices with active layers consisting of the amphiphilic conjugated D-A-D-type molecules were constructed to demonstrate that the LB technique is an effective layer-by-layer deposition approach to fabricate self-assembled, ordered thin films.

Original languageEnglish (US)
Pages (from-to)11995-12004
Number of pages10
JournalACS Applied Materials and Interfaces
Volume10
Issue number14
DOIs
StatePublished - Apr 11 2018
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)

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