Self-Assembled Photochromic Molecular Dipoles for High-Performance Polymer Thin-Film Transistors

Satyaprasad P. Senanayak, Vinod K. Sangwan, Julian J. McMorrow, Ken Everaerts, Zhihua Chen, Antonio Facchetti, Mark C. Hersam, Tobin J. Marks, K. S. Narayan

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The development of high-performance multifunctional polymer-based electronic circuits is a major step toward future flexible electronics. Here, we demonstrate a tunable approach to fabricate such devices based on rationally designed dielectric super-lattice structures with photochromic azobenzene molecules. These nanodielectrics possessing ionic, molecular, and atomic polarization are utilized in polymer thin-film transistors (TFTs) to realize high-performance electronics with a p-type field-effect mobility (μFET) exceeding 2 cm2 V-1 s-1. A crossover in the transport mechanism from electrostatic dipolar disorder to ionic-induced disorder is observed in the transistor characteristics over a range of temperatures. The facile supramolecular design allows the possibility to optically control the extent of molecular and ionic polarization in the ultrathin nanodielectric. Thus, we demonstrate a 3-fold increase in the capacitance from 0.1 to 0.34 μF/cm2, which results in a 200% increase in TFT channel current.

Original languageEnglish
Pages (from-to)21492-21498
Number of pages7
JournalACS Applied Materials and Interfaces
Volume10
Issue number25
DOIs
Publication statusPublished - Jun 27 2018

Keywords

  • nanodielectrics
  • photochromism
  • phototransistors
  • polymer transistors
  • self-assembly

ASJC Scopus subject areas

  • Materials Science(all)

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