journal article·2024-07-01

Photography-Inspired Patterned Vapor Phase Polymerization of Conductive PEDOT on Rigid and Stretchable Substrates

Samuel J. Edmunds, Armando D. Urbina, Hannah E. Fishman, Yi Qie, Rafael A. Montalvo, Noel Sebastien D. Mallari, Marc N. Levy, Rachel Blau, Abdulhameed Abdal, Andrea M. Armani, Tse Nga Ng, Nathan A. Romero, Darren J. Lipomi

ACS Materials Letters· Volume 6· Issue 7
Publisher page

Abstract

The conductive polymers poly(3,4-ethylenedioxythiophene) (PEDOT) and polypyrrole are widely used in organic optoelectronic, bioelectronic, and electrochromic applications. However, a general process for forming highly conductive films with high spatial resolution on various substrates is lacking. This work describes a technique for forming PEDOT and polypyrrole films with high spatial resolution using vapor-phase polymerization (VPP). The process, reminiscent of classical black-and-white photography, employs a photosensitive VPP initiating film. UV light selectively deactivates the film, allowing oxidative polymerization in unexposed regions. Substrates are modified with N-[3-(trimethoxysilyl)propyl]aniline to enhance adhesion. Optimizing the initiating film composition and exposure conditions achieves conductive lines as narrow as 15 μm with PEDOT conductivities over 1000 S cm –1 . Mechanistic studies using X-ray photoelectron spectroscopy, UV–visible spectroscopy, and Fourier transform infrared spectroscopy suggest a critical role of oxidative decomposition by photoinitiated ligand-to-metal charge transfer. The resulting conductive patterns exhibit abrasion resistance on glass, retain conductivity when stretched on elastomers, and enable two-color electrochromic displays.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Conducting polymers and applications · Advanced Sensor and Energy Harvesting Materials · Organic Electronics and Photovoltaics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Electrical Engineering, University of California, San Diego, 9500 Gilman Drive Mail Code 0448, La Jolla, California 92093-0448, United States

Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, United States

Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive Mail Code 0448, La Jolla, California 92093-0448, United States

Department of Mechanical and Aerospace Engineering, University of California, San Diego, 9500 Gilman Drive Mail Code 0448, La Jolla, California 92093-0448, United States

Ellison Institute of Technology, Los Angeles, California 90064, United States

Program in Materials Science and Engineering, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States

Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr. Mail Code 0309, La Jolla, California 92093-0309 United States

Funding

National Science Foundation Graduate Research Fellowship Program · Air Force Office of Scientific Research · Kuwait Foundation for the Advancement of Sciences · National Institute of General Medical Sciences

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