Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Infrared Organic Photodetectors Employing Ultralow Bandgap Polymer and Non-Fullerene Acceptors for Biometric Monitoring
Δημιουργός/Συγγραφέας:	Jacoutot, Polina Scaccabarozzi, Alberto D Zhang, Tianyi Qiao, Zhuoran Aniés, Filip Neophytou, Marios Bristow, Helen Kumar, Rhea Moser, Maximilian Nega, Alkmini D. Schiza, Andriana Dimitrakopoulou-Strauss, Antonia [EL] Γρηγορίου, Βασίλης Γ.[EN] Gregoriou, Vasilis G. Anthopoulos, Thomas D Heeney, Martin McCulloch, Iain Bakulin, Artem A [EL] Χώχος, Χρήστος[EN] Chochos, Christos Gasparini, Nicola
Ημερομηνία:	2022-04
Γλώσσα:	Αγγλικά
ISSN:	1613-6810 1613-6829
DOI:	10.1002/smll.202200580
Άλλο:	35246948
Περίληψη:	Recent efforts in the field of organic photodetectors (OPD) have been focused on extending broadband detection into the near-infrared (NIR) region. Here, two blends of an ultralow bandgap push-pull polymer TQ-T combined with state-of-the-art non-fullerene acceptors, IEICO-4F and Y6, are compared to obtain OPDs for sensing in the NIR beyond 1100 nm, which is the cut off for benchmark Si photodiodes. It is observed that the TQ-T:IEICO-4F device has a superior IR responsivity (0.03 AW-1 at 1200 nm and -2 V bias) and can detect infrared light up to 1800 nm, while the TQ-T:Y6 blend shows a lower responsivity of 0.01 AW-1 . Device physics analyses are tied with spectroscopic and morphological studies to link the superior performance of TQ-T:IEICO-4F OPD to its faster charge separation as well as more favorable donor-acceptor domains mixing. In the polymer blend with Y6, the formation of large agglomerates that exceed the exciton diffusion length, which leads to high charge recombination, is observed. An application of these devices as biometric sensors for real-time heart rate monitoring via photoplethysmography, utilizing infrared light, is demonstrated.
Τίτλος πηγής δημοσίευσης:	Small (Weinheim an der Bergstrasse, Germany)
Τόμος/Κεφάλαιο:	18
Τεύχος:	15
Θεματική Κατηγορία:	[EL] Φασματοσκοπία[EN] Spectroscopy [EL] Βιοιατρική μηχανική. Ηλεκτρονική. Ενοργάνιση[EN] Biomedical engineering. Electronics. Instrumentation [EL] Οργανική χημεία[EN] Organic chemistry [EL] Χημική τεχνολογία[EN] Chemical technolgy
Λέξεις-Κλειδιά:	Biometric sensors NIR sensors Non-fullerene photodetectors Organic photodetectors Very low bandgap polymers
EU Grant identifier:	OSR-2019-CRG8-4086 OSR-2018-CRG7-3749 SC2 (610115) n°952911 n°862474
Κάτοχος πνευματικών δικαιωμάτων:	© 2022 The Authors. Small published by Wiley-VCH GmbH
Όροι και προϋποθέσεις δικαιωμάτων:	This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://onlinelibrary.wiley.com/doi/epdf/10.1002/smll.202200580
Σημειώσεις:	A.A.B and P.J. would like to thank the Royal Society for financial support. M.N, H.B, M.M., and I.M. acknowledge financial support from KAUST, including Office of Sponsored Research (OSR) awards no. OSR-2019-CRG8-4086 and OSR-2018-CRG7-3749. The authors acknowledge funding from ERC Synergy Grant SC2 (610115), the European Union’s Horizon 2020 research and innovation programme under grant agreement n°952911, project BOOSTER and grant agreement n°862474, project RoLA-FLEX, as well as EPSRC Project EP/T026219/1. The authors A.D.S and T.D.A would like to thank the ALBA synchrotron and staff for their help with the GIWAXS measurements. The authors acknowledge the King Abdullah University of Science and Technology (KAUST) for financial support.
Εμφανίζεται στις συλλογές:	Ινστιτούτο Χημικής Βιολογίας - Επιστημονικό έργο