2D Metal–Organic Framework Cu3(HHTT)2 Films for Broadband Photodetectors from Ultraviolet to Mid-Infrared

Chun Ki Liu, Venkatesh Piradi, Jiajun Song, Ziru Wang, Lok Wing Wong, Eng Hao Louis Tan, Jiong Zhao, Xunjin Zhu*, Feng Yan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Cu3(HHTT)2 (HHTT: 2,3,7,8,12,13-hexahydroxytetraazanaphthotetraphene) is a novel 2D conjugated metal–organic framework (2D c-MOF) with efficient in-plane d–π conjugations and strong interlayer π–π interactions while the growth of Cu3(HHTT)2 thin films has never been reported until now. Here, the successful fabrication of highly oriented wafer-scale Cu3(HHTT)2 thin films with a layer-by-layer growth method on various substrates is presented. Its semiconducting behavior and carrier transport mechanisms are clarified through temperature and frequency-dependent conductivity measurements. Flexible photodetectors based on Cu3(HHTT)2 thin films exhibit reliable photoresponses at room temperature in a wavelength region from UV to mid-IR, which is much broader than those of solution-processed broadband photodetectors reported previously. Moreover, the photodetectors can show a typical synaptic behavior and excellent data recognition accuracy in artificial neural networks. This work opens a window for the exploration of high-performance and multifunctional optoelectronic devices based on 2D c-MOFs.

Original languageEnglish
Article number2204140
JournalAdvanced Materials
Volume34
Issue number32
Early online date28 Jun 2022
DOIs
Publication statusPublished - Aug 2022

Scopus Subject Areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Science(all)

User-Defined Keywords

  • 2D metal-organic framework
  • broadband photodetectors
  • conduction mechanism
  • flexible electronics
  • optical synapses

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