Ultra-Narrowband Near-Infrared Responsive J-Aggregates of Fused Quinoidal Tetracyanoindacenodithiophene

Qiao He, Aniruddha Basu, Hyojung Cha, Matyas Daboczi, Julianna Panidi, Luxi Tan, Xiantao Hu, Chi Cheng Huang, Bowen Ding, Andrew J. P. White, Ji-Seon Kim, James R. Durrant, Thomas D. Anthopoulos, Martin Heeney

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Narrowband photoresponsive molecules are highly coveted in high-resolution imaging, sensing and monochromatic photodetection, especially those extending into the near-infrared (NIR) spectral range. Here we report a new class of J-aggregating materials based on quinoidal indacenodithiophenes (IDT) which exhibit an ultra-narrowband (full width half maxima of 22 nm) NIR absorption peak centered at 770 nm. The spectral width is readily tuned by the length of the solubilising alkyl group, with longer chains resulting in significant spectral narrowing. The J-aggregate behaviour is confirmed by a combination of excited state lifetime measurements and single-crystal X-ray diffraction measurements. Their utility as electron transporting materials is demonstrated in both transistor and phototransistor devices, with the latter demonstrating good response at NIR wavelengths (780 nm) over a range of intensities.
Original languageEnglish (US)
Pages (from-to)2209800
JournalAdvanced Materials
DOIs
StatePublished - Dec 23 2022

Bibliographical note

KAUST Repository Item: Exported on 2022-12-26
Acknowledged KAUST grant number(s): OSR-2020-CRG8-4095
Acknowledgements: We would like to thank the Engineering and Physics Science Research Council (EPSRC) (EP/V048686/1 and EP/T028513/1), the Royal Society and Wolfson Foundation, and the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OSR-2020-CRG8-4095 for financial support.

ASJC Scopus subject areas

  • Mechanics of Materials
  • General Materials Science
  • Mechanical Engineering

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