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{Kosco:2021:10.1002/adma.202105007,
author = {Kosco, J and Gonzalez-Carrero, S and Howells, CT and Zhang, W and Moser, M and Sheelamanthula, R and Zhao, L and Willner, B and Hidalgo, TC and Faber, H and Purushothaman, B and Sachs, M and Cha, H and Sougrat, R and Anthopoulos, TD and Inal, S and Durrant, JR and McCulloch, I},
doi = {10.1002/adma.202105007},
journal = {Advanced Materials},
pages = {1--9},
title = {Oligoethylene glycol side chains increase charge generation in organic semiconductor nanoparticles for enhanced photocatalytic hydrogen evolution},
url = {http://dx.doi.org/10.1002/adma.202105007},
volume = {34},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Organic semiconductor nanoparticles (NPs) composed of an electron donor/acceptor (D/A) semiconductor blend have recently emerged as an efficient class of hydrogen-evolution photocatalysts. It is demonstrated that using conjugated polymers functionalized with (oligo)ethylene glycol side chains in NP photocatalysts can greatly enhance their H2-evolution efficiency compared to their nonglycolated analogues. The strategy is broadly applicable to a range of structurally diverse conjugated polymers. Transient spectroscopic studies show that glycolation facilitates charge generation even in the absence of a D/A heterojunction, and further suppresses both geminate and nongeminate charge recombination in D/A NPs. This results in a high yield of photogenerated charges with lifetimes long enough to efficiently drive ascorbic acid oxidation, which is correlated with greatly enhanced H2-evolution rates in the glycolated NPs. Glycolation increases the relative permittivity of the semiconductors and facilitates water uptake. Together, these effects may increase the high-frequency relative permittivity inside the NPs sufficiently, to cause the observed suppression of exciton and charge recombination responsible for the high photocatalytic activities of the glycolated NPs.
AU  - Kosco,J
AU  - Gonzalez-Carrero,S
AU  - Howells,CT
AU  - Zhang,W
AU  - Moser,M
AU  - Sheelamanthula,R
AU  - Zhao,L
AU  - Willner,B
AU  - Hidalgo,TC
AU  - Faber,H
AU  - Purushothaman,B
AU  - Sachs,M
AU  - Cha,H
AU  - Sougrat,R
AU  - Anthopoulos,TD
AU  - Inal,S
AU  - Durrant,JR
AU  - McCulloch,I
DO  - 10.1002/adma.202105007
EP  - 9
PY  - 2021///
SN  - 0935-9648
SP  - 1
TI  - Oligoethylene glycol side chains increase charge generation in organic semiconductor nanoparticles for enhanced photocatalytic hydrogen evolution
T2  - Advanced Materials
UR  - http://dx.doi.org/10.1002/adma.202105007
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000722551100001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://onlinelibrary.wiley.com/doi/10.1002/adma.202105007
UR  - http://hdl.handle.net/10044/1/94444
VL  - 34
ER  -
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