Interfacial Interaction Enables Enhanced Mobility in Hybrid Perovskite-Conjugated Polymer Transistors with High-k Fluorinated Polymer Dielectrics

Vivian Nketia-Yawson, Benjamin Nketia-Yawson, Jea Woong Jo

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The charge carrier mobility of organic field-effect transistors (OFETs) has been remarkably improved through several engineering approaches and techniques by targeting pivotal parts. Herein, an ultrathin perovskite channel layer that boosts the field-effect mobility of conjugated polymer OFETs by forming perovskite-conjugated polymer hybrid semiconducting channel is introduced. The optimized lead-iodide-based perovskite-conjugated polymer hybrid channel transistors show enhanced hole mobility of over 4 cm2 V–1 s–1 (average = 2.10 cm2 V–1 s–1) with high reproducibility using a benchmark poly(3-hexylthiophene) (P3HT) polymer and employing high-k fluorinated polymer dielectrics. A significant hole carrier mobility enhancement of ≈200–400% in benzo[1,2-b:4,5:b′]dithiophene (BDT)-based conjugated polymers is also demonstrated by exploring certain interactive groups with perovskite. This significant enhancement in the transistor performance is attributed to the increased charge carrier density in the hybrid semiconducting channel and the perovskite–polymer interactions. The findings of this paper demonstrate an exceptional engineering approach for carrier mobility enhancement in hybrid perovskite-conjugated-polymer-based electronic devices.

Original languageEnglish
Article number2200954
JournalMacromolecular Rapid Communications
Volume44
Issue number8
DOIs
StatePublished - Apr 2023

Keywords

  • conjugated polymers
  • high-k polymer dielectrics
  • hybrid perovskite-conjugated polymer transistors
  • lead-iodide perovskite

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