Hydrophenazine-linked two-dimensional ladder-type crystalline fused aromatic network with high charge transport

Hyuk Jun Noh, Sein Chung, Mahmut Sait Okyay, Yoon Kwang Im, Seong Wook Kim, Do Hyung Kweon, Jong Pil Jeon, Jeong Min Seo, Na Hyun Kim, Soo Young Yu, Youjin Reo, Yong Young Noh, Boseok Kang, Noejung Park, Javeed Mahmood*, Kilwon Cho*, Jong Beom Baek*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Since the advent of graphene, the development of crystalline two-dimensional (2D) organic materials with semiconducting features has been extensively explored for their potential optoelectronic applications. Despite extensive progress in this field, it is still challenging to realize laterally extended organic materials with high electrical transport properties. Here, we report a 2D ladder-type fused aromatic network (FAN) in which backbones are composed of hydrophenazine (HP) linkage (designated HP-FAN). Consequently, its 2D extended delocalization of π-molecular orbitals imparts a semiconducting band gap and facilitates fast intra-chain charge transport. The as-prepared HP-FAN exhibits semiconducting features with calculated and experimental band gaps of approximately 1.44 and 1.54 eV, respectively, with an unusual flat band. The HP-FAN thin flakes, isolated by polydimethylsiloxane stamping, exhibit remarkable performance in a p-type field-effect transistor (FET) and a Hall effect device. Given its laterally extended ladder-type π-conjugated structure, the HP-FAN has extensive potential for applications in thin-film optoelectronic devices.

Original languageEnglish (US)
Pages (from-to)3130-3144
Number of pages15
Issue number11
StatePublished - Nov 10 2022

Bibliographical note

Funding Information:
This research was supported by the Creative Research Initiative ( CRI , 2014R1A3A2069102 ), Science Research Center ( SRC , 2016R1A5A1009405 ), and Young Researcher ( 2019R1C1C1006650 ) programs, 2020R1A2C3004477 and 2019R1A2C2089332 , through the National Research Foundation (NRF) of Korea and the U-K brand project ( 1.200096.01 ) of UNIST .

Publisher Copyright:
© 2022 Elsevier Inc.


  • charge carrier mobility
  • fused aromatic network
  • Hall effect
  • SDG9: Industry, innovation, and infrastructure
  • semiconducting
  • two-dimensional

ASJC Scopus subject areas

  • General Chemistry
  • Biochemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Biochemistry, medical
  • Materials Chemistry


Dive into the research topics of 'Hydrophenazine-linked two-dimensional ladder-type crystalline fused aromatic network with high charge transport'. Together they form a unique fingerprint.

Cite this