Please use this identifier to cite or link to this item:
http://hdl.handle.net/1942/32695
Title: | Efficient and readily tuneable near-infrared photodetection up to 1500 nm enabled by thiadiazoloquinoxaline-based push–pull type conjugated polymers | Authors: | VERSTRAETEN, Frederik GIELEN, Sam VERSTAPPEN, Pieter RAYMAKERS, Jorne PENXTEN, Huguette LUTSEN, Laurence VANDEWAL, Koen MAES, Wouter |
Issue Date: | 2020 | Publisher: | ROYAL SOC CHEMISTRY | Source: | JOURNAL OF MATERIALS CHEMISTRY C, 8 (29) , p. 10098 -10103 | Abstract: | The majority of bulk heterojunction near-infrared organic photodetectors (NIR-OPDs) have an absorption window up to 1000 nm (1.2 eV) due to the scarcity of suitable NIR-absorbing electron donor polymers and the challenging energy alignment and/or blend miscibility with electron acceptor materials, strongly complicating to move beyond this wavelength range. Nonetheless, extension of the detectivity further into the NIR is important for applications such as bio-imaging, pulse oximetry and industrial sorting. Herein, we illustrate that [1,2,5]thiadiazolo[3,4-g]quinoxaline (TQ) is an excellent building block for the development of ultra-low bandgap copolymers to achieve tuneable NIR photodetection beyond 1000 nm. Three TQ monomers with different side chain patterns are synthesized and combined with carefully selected electron rich subunits to yield push-pull type copolymers with an optical gap ranging from 1.14 to 0.87 eV. The highest gap material affords the best OPD performance, with a peak specific detectivity of 3 x 10(11)Jones at 960 nm (at -2 V bias). The other polymers show <1 eV optical gaps and specific detectivities exceeding 10(10)Jones up to 1400 nm (at -2 V bias). These values are among the highest reported so far for NIR-OPDs in the wavelength range beyond 1000 nm. | Notes: | Maes, W (corresponding author), UHasselt Hasselt Univ, Inst Mat Res IMO, Agoralaan 1 Bldg D, B-3590 Diepenbeek, Belgium.; Maes, W (corresponding author), IMEC, Associated Lab IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. wouter.maes@uhasselt.be |
Other: | Maes, W (corresponding author), UHasselt Hasselt Univ, Inst Mat Res IMO, Agoralaan 1 Bldg D, B-3590 Diepenbeek, Belgium ; IMEC, Associated Lab IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. wouter.maes@uhasselt.be | Keywords: | Donor-Acceptor Polymers;Organic Photodetectors;High-Detectivity;Performance;Morphology;Detectors;Electron | Document URI: | http://hdl.handle.net/1942/32695 | ISSN: | 2050-7526 | e-ISSN: | 2050-7534 | DOI: | 10.1039/d0tc01435d | ISI #: | WOS:000554788100030 | Rights: | The Royal Society of Chemistry 2020. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2021 |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Revised manuscript Verstraeten et al JMC C 2020.pdf | Peer-reviewed author version | 1.13 MB | Adobe PDF | View/Open |
d0tc01435d.pdf Restricted Access | Published version | 2.56 MB | Adobe PDF | View/Open Request a copy |
WEB OF SCIENCETM
Citations
46
checked on Oct 13, 2024
Page view(s)
232
checked on Sep 6, 2022
Download(s)
94
checked on Sep 6, 2022
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.