Imperial College London

ProfessorMartinHeeney

Faculty of Natural SciencesDepartment of Chemistry

Professor of Organic Materials
 
 
 
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Contact

 

+44 (0)20 7594 1248m.heeney Website

 
 
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Location

 

401GMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{He:2020:10.1021/acsami.0c00981,
author = {He, Q and Shahid, M and Jiao, X and Gann, E and Eisner, F and Wu, T and Fei, Z and Anthopoulos, TD and McNeill, CR and Heeney, MJ},
doi = {10.1021/acsami.0c00981},
journal = {ACS Applied Materials and Interfaces},
pages = {9555--9562},
title = {The crucial role of fluorine in fully alkylated ladder type carbazole based non-fullerene organic solar cells},
url = {http://dx.doi.org/10.1021/acsami.0c00981},
volume = {12},
year = {2020}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Two fused ladder type non-fullerene acceptors, DTCCIC and DTCCIC-4F, based on an electron-donating alkylated dithienocyclopentacarbazole core flanked by electron-withdrawing non-fluorinated or fluorinated 1,1-dicyanomethylene-3-indanone (IC or IC-4F), are prepared and utilized in organic solar cells (OSCs). The two new molecules reveal planar structures and strong aggregation behavior, and fluorination is shown to red shift the optical band gap and down shift energy levels. OSCs based on DTCCIC-4F exhibit a power conversion efficiency of 12.6 %, much higher than that of DTCCIC based devices (6.2 %). Microstructural studies reveal that while both acceptors are highly crystalline, bulk heterojunction blends based on the non-fluorinated DTCCIC result in overly coarse domains, while blends based on the fluorinated DTCCIC-4F exhibit a more optimal nanoscale morphology. These results highlight the importance of end group fluorination in controlling molecular aggregation and miscibility.
AU - He,Q
AU - Shahid,M
AU - Jiao,X
AU - Gann,E
AU - Eisner,F
AU - Wu,T
AU - Fei,Z
AU - Anthopoulos,TD
AU - McNeill,CR
AU - Heeney,MJ
DO - 10.1021/acsami.0c00981
EP - 9562
PY - 2020///
SN - 1944-8244
SP - 9555
TI - The crucial role of fluorine in fully alkylated ladder type carbazole based non-fullerene organic solar cells
T2 - ACS Applied Materials and Interfaces
UR - http://dx.doi.org/10.1021/acsami.0c00981
UR - https://www.ncbi.nlm.nih.gov/pubmed/31999092
UR - https://pubs.acs.org/doi/10.1021/acsami.0c00981
UR - http://hdl.handle.net/10044/1/76747
VL - 12
ER -