n-Type Glycolated Imide-Fused Polycyclic Aromatic Hydrocarbons with High Capacity for Liquid/Solid-Electrolyte-based Electrochemical Devices

Yaping Yu, Genming Zhu, Liuyuan Lan, Junxin Chen, Xiuyuan Zhu, Jiayao Duan, Shengyu Cong, Zhengke Li, Yunxia Wang, Zhaohui Wang, Iain McCulloch, Wan Yue

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Currently, n-type small-molecule mixed ionic-electronic conductors remain less explored and their molecular design rules are not mature enough. Herein, two n-type glycolated imide-fused polycyclic aromatic hydrocarbons (IPAHs), d-gdiPDI and t-gdiPDI, are developed to probe the effects of molecular conformation on the electronic, electrochemical, morphological, and coupled ionic-electronic transport properties. It is found that the highly twisted scaffold in d-gdiPDI, compared to the nearly planar one of t-gdiPDI, has a strong positive effect on the charge storage properties and thus the performance of organic electrochemical transistors (OECTs). d-gdiPDI exhibits a volumetric capacitance of 657 F cm−3, obviously outperforming that of t-gdiPDI (261 F cm−3), which is the highest value reported to date for small-molecule OECT materials. Moreover, a high charge-storage capacity of up to 479 F g−1 is observed for d-gdiPDI. Arising from such high ionic-electronic coupling characteristic, d-gdiPDI-based OECTs present a ≈2 × times higher geometry-normalized transconductance (gm,norm) of 105.3 mS cm−1 relative to that of t-gdiPDI counterparts. Significantly, further application of d-gdiPDI in solid-electrolyte OECTs delivers a gm,norm of 142.4 mS cm−1. These findings indicate that IPAHs are very promising candidates for n-type small-molecule OECTs and highlight the superiority of twisting conformation manipulation in materials design toward high-performance electrochemical devices.

Original languageEnglish (US)
Article number2300012
JournalAdvanced Functional Materials
Volume33
Issue number22
DOIs
StatePublished - May 25 2023
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Biomaterials
  • General Materials Science
  • Condensed Matter Physics
  • Electrochemistry

Keywords

  • high capacities
  • imide-fused polycyclic aromatic hydrocarbons
  • ionic-electronic conductors
  • n-types
  • organic electrochemical transistors

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