A Rational Design of Isoindigo-Based Conjugated Microporous n-Type Semiconductors for High Electron Mobility and Conductivity: Advanced Science

K.C. Ranjeesh, A. Rezk, J.I. Martinez, S. Gaber, A. Merhi, T. Skorjanc, M. Finšgar, G.E. Luckachan, A. Trabolsi, B.R. Kaafarani, A. Nayfeh, D. Shetty

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The development of n-type organic semiconductors has evolved significantly slower in comparison to that of p-type organic semiconductors mainly due to the lack of electron-deficient building blocks with stability and processability. However, to realize a variety of organic optoelectronic devices, high-performance n-type polymer semiconductors are essential. Herein, conjugated microporous polymers (CMPs) comprising isoindigo acceptor units linked to benzene or pyrene donor units (BI and PI) showing n-type semiconducting behavior are reported. In addition, considering the challenges of deposition of a continuous and homogeneous thin film of CMPs for accurate Hall measurements, a plasma-assisted fabrication technique is developed to yield uniform thin films. The fully conjugated 2D networks in PI- and BI-CMP films display high electron mobility of 6.6 and 3.5 cm2 V−1 s−1, respectively. The higher carrier concentration in PI results in high conductivity (5.3 mS cm−1). Both experimental and computational studies are adequately combined to investigate structure–property relations for this intriguing class of materials in the context of organic electronics. © 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.
Original languageBritish English
JournalAdv. Sci.
Volume10
Issue number29
DOIs
StatePublished - 2023

Keywords

  • 2D-polymers
  • conjugated microporous polymers
  • electron-conducting materials
  • isoindigo
  • n-type organic semiconductors
  • Carrier concentration
  • Conjugated polymers
  • Deposition
  • Electron mobility
  • Electrons
  • Microporous materials
  • Optoelectronic devices
  • Thin films
  • 2-d polymers
  • Conducting materials
  • Conjugated microporous polymers
  • Electron conducting
  • Electron-conducting material
  • High electron mobility
  • Isoindigo
  • Microporous
  • N-type organic semiconductor
  • Rational design
  • Microporosity

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