Imperial College London
Alternate

ProfessorIainMcCulloch

Faculty of Natural Sciences, Department of Chemistry

Visiting Professor
 
 
 
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Contact

 

+44 (0)20 7594 5669i.mcculloch

 
 
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Location

 

Molecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Jacoutot:2022:10.1002/smll.202200580,
author = {Jacoutot, P and Scaccabarozzi, AD and Zhang, T and Qiao, Z and Anies, F and Neophytou, M and Bristow, H and Kumar, R and Moser, M and Nega, AD and Schiza, A and Dimitrakopoulou-Strauss, A and Gregoriou, VG and Anthopoulos, TD and Heeney, M and McCulloch, I and Bakulin, AA and Chochos, CL and Gasparini, N},
doi = {10.1002/smll.202200580},
journal = {Small},
pages = {1--10},
title = {Infrared organic photodetectors employing ultralow bandgap polymer and non-fullerene acceptors for biometric monitoring},
url = {http://dx.doi.org/10.1002/smll.202200580},
volume = {18},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - 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.
AU  - Jacoutot,P
AU  - Scaccabarozzi,AD
AU  - Zhang,T
AU  - Qiao,Z
AU  - Anies,F
AU  - Neophytou,M
AU  - Bristow,H
AU  - Kumar,R
AU  - Moser,M
AU  - Nega,AD
AU  - Schiza,A
AU  - Dimitrakopoulou-Strauss,A
AU  - Gregoriou,VG
AU  - Anthopoulos,TD
AU  - Heeney,M
AU  - McCulloch,I
AU  - Bakulin,AA
AU  - Chochos,CL
AU  - Gasparini,N
DO  - 10.1002/smll.202200580
EP  - 10
PY  - 2022///
SN  - 1613-6810
SP  - 1
TI  - Infrared organic photodetectors employing ultralow bandgap polymer and non-fullerene acceptors for biometric monitoring
T2  - Small
UR  - http://dx.doi.org/10.1002/smll.202200580
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000764622400001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://onlinelibrary.wiley.com/doi/10.1002/smll.202200580
UR  - http://hdl.handle.net/10044/1/96294
VL  - 18
ER  -
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