Imperial College London
Portrait Picture

Professor James Durrant, CBE, FRS

Faculty of Natural Sciences, Department of Chemistry

Professor of Photochemistry
 
 
 
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Contact

 

+44 (0)20 7594 5321j.durrant Website

 
 
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Assistant

 

Miss Lisa Benbow +44 (0)20 7594 5883

 
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Location

 

G22CMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Kosco:2022:10.1038/s41560-022-00990-2,
author = {Kosco, J and Gonzalez, Carrero S and Howells, CT and Fei, T and Dong, Y and Sougrat, R and Harrison, GT and Firdaus, Y and Sheelamanthula, R and Purushothaman, B and Moruzzi, F and Xu, W and Zhao, L and Basu, A and De, Wolf S and Anthopoulos, TD and Durrant, JR and McCulloch, I},
doi = {10.1038/s41560-022-00990-2},
journal = {Nature Energy},
pages = {340--351},
title = {Generation of long-lived charges in organic semiconductor heterojunction nanoparticles for efficient photocatalytic hydrogen evolution},
url = {http://dx.doi.org/10.1038/s41560-022-00990-2},
volume = {7},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Organic semiconductor photocatalysts for the production of solar fuels are attractive as they can be synthetically tuned to absorb visible light while simultaneously retaining suitable energy levels to drive a range of processes. However, a greater understanding of the photophysics that determines the function of organic semiconductor heterojunction nanoparticles is needed to optimize performance. Here, we show that such materials can intrinsically generate remarkably long-lived reactive charges, enabling them to efficiently drive sacrificial hydrogen evolution. Our optimized hetereojunction photocatalysts comprise the conjugated polymer PM6 matched with Y6 or PCBM electron acceptors, and achieve external quantum efficiencies of 1.0% to 5.0% at 400 to 900 nm and 8.7% to 2.6% at 400 to 700 nm, respectively. Employing transient and operando spectroscopies, we find that the heterojunction structure in these nanoparticles greatly enhances the generation of long-lived charges (millisecond to second timescale) even in the absence of electron/hole scavengers or Pt. Such long-lived reactive charges open potential applications in water-splitting Z-schemes and in driving kinetically slow and technologically desirable oxidations.
AU  - Kosco,J
AU  - Gonzalez,Carrero S
AU  - Howells,CT
AU  - Fei,T
AU  - Dong,Y
AU  - Sougrat,R
AU  - Harrison,GT
AU  - Firdaus,Y
AU  - Sheelamanthula,R
AU  - Purushothaman,B
AU  - Moruzzi,F
AU  - Xu,W
AU  - Zhao,L
AU  - Basu,A
AU  - De,Wolf S
AU  - Anthopoulos,TD
AU  - Durrant,JR
AU  - McCulloch,I
DO  - 10.1038/s41560-022-00990-2
EP  - 351
PY  - 2022///
SN  - 2058-7546
SP  - 340
TI  - Generation of long-lived charges in organic semiconductor heterojunction nanoparticles for efficient photocatalytic hydrogen evolution
T2  - Nature Energy
UR  - http://dx.doi.org/10.1038/s41560-022-00990-2
UR  - http://hdl.handle.net/10044/1/95619
VL  - 7
ER  -
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