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Infrared organic photodetectors employing ultralow bandgap polymer and non-fullerene acceptors for biometric monitoring

Title: Infrared organic photodetectors employing ultralow bandgap polymer and non-fullerene acceptors for biometric monitoring
Authors: Jacoutot, P
Scaccabarozzi, AD
Zhang, T
Qiao, Z
Anies, F
Neophytou, M
Bristow, H
Kumar, R
Moser, M
Nega, AD
Schiza, A
Dimitrakopoulou-Strauss, A
Gregoriou, VG
Anthopoulos, TD
Heeney, M
McCulloch, I
Bakulin, AA
Chochos, CL
Gasparini, N
Item Type: Journal Article
Abstract: 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.
Issue Date: 14-Apr-2022
Date of Acceptance: 1-Mar-2022
URI: http://hdl.handle.net/10044/1/96294
DOI: 10.1002/smll.202200580
ISSN: 1613-6810
Publisher: Wiley
Start Page: 1
End Page: 10
Journal / Book Title: Small
Volume: 18
Issue: 15
Copyright Statement: © 2022 The Authors. Small published by Wiley-VCH GmbH 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.
Sponsor/Funder: The Royal Society
Funder's Grant Number: UF130178
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
biometric sensors
NIR sensors
non-fullerene photodetectors
organic photodetectors
very low bandgap polymers
CHARGE-TRANSFER
PHOTODIODES
STATES
NIR sensors
biometric sensors
non-fullerene photodetectors
organic photodetectors
very low bandgap polymers
Infrared Rays
Monitoring, Physiologic
Polymers
Solar Energy
Polymers
Monitoring, Physiologic
Solar Energy
Infrared Rays
Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
biometric sensors
NIR sensors
non-fullerene photodetectors
organic photodetectors
very low bandgap polymers
CHARGE-TRANSFER
PHOTODIODES
STATES
Nanoscience & Nanotechnology
Publication Status: Published
Open Access location: https://onlinelibrary.wiley.com/doi/full/10.1002/smll.202200580
Article Number: ARTN 2200580
Online Publication Date: 2022-03-04
Appears in Collections:Physics
Chemistry
Experimental Solid State
Faculty of Natural Sciences



This item is licensed under a Creative Commons License Creative Commons