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Title: Langmuir–Blodgett Thin Films of Diketopyrrolopyrrole-Based Amphiphiles

Here, 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.
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  1. Georgia Inst. of Technology, Atlanta, GA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. North Carolina State Univ., Raleigh, NC (United States)
Publication Date:
Grant/Contract Number:
AC02-76SF00515; N00014-17-1-2243; N00014-17-1-2208; N00014-14-1-0580
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 10; Journal Issue: 14; Journal ID: ISSN 1944-8244
American Chemical Society (ACS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
Country of Publication:
United States
36 MATERIALS SCIENCE; amphiphilic molecules; diketopyrrolopyrrole; donor−acceptor−donor molecules; Langmuir−Blodgett; layer-by-layer deposition; monolayer; organic field-effect transistor
OSTI Identifier: