Imperial College London
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ProfessorMartinHeeney

Faculty of Natural Sciences, Department 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{Ye:2019:10.1002/adma.201808153,
author = {Ye, L and Xiong, Y and Chen, Z and Zhang, Q and Fei, Z and Henry, R and Heeney, M and O'Connor, BT and You, W and Ade, H},
doi = {10.1002/adma.201808153},
journal = {Adv Mater},
pages = {e1808153--e1808153},
title = {Sequential Deposition of Organic Films with Eco-Compatible Solvents Improves Performance and Enables Over 12%-Efficiency Nonfullerene Solar Cells.},
url = {http://dx.doi.org/10.1002/adma.201808153},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Casting of a donor:acceptor bulk-heterojunction structure from a single ink has been the predominant fabrication method of organic photovoltaics (OPVs). Despite the success of such bulk heterojunctions, the task ofcontrolling the microstructure in a single casting process has been arduous and alternative approaches are desired. To achieve OPVs with a desirable microstructure, a facile and eco-compatible sequential deposition approach is demonstrated for polymer/small-molecule pairs. Using a nominally amorphous polymer as the model material, the profound influence of casting solvent is shown on the molecular ordering of the film, and thus the device performance and mesoscale morphology of sequentially deposited OPVs can be tuned. Static and in situ X-ray scattering indicate that applying (R)-(+)-limonene is able to greatly promote the molecular order of weakly crystalline polymers and form the largest domain spacing exclusively, which correlates well with the best efficiency of 12.5% in sequentially deposited devices. The sequentially cast device generally outperforms its control device based on traditional single-ink bulk-heterojunction structure. More crucially, a simple polymer:solvent interaction parameter χ is positively correlated with domain spacing in these sequentially deposited devices. These findings shed light on innovative approaches to rationally create environmentally friendly and highly efficient electronics.
AU  - Ye,L
AU  - Xiong,Y
AU  - Chen,Z
AU  - Zhang,Q
AU  - Fei,Z
AU  - Henry,R
AU  - Heeney,M
AU  - O'Connor,BT
AU  - You,W
AU  - Ade,H
DO  - 10.1002/adma.201808153
EP  - 1808153
PY  - 2019///
SP  - 1808153
TI  - Sequential Deposition of Organic Films with Eco-Compatible Solvents Improves Performance and Enables Over 12%-Efficiency Nonfullerene Solar Cells.
T2  - Adv Mater
UR  - http://dx.doi.org/10.1002/adma.201808153
UR  - https://www.ncbi.nlm.nih.gov/pubmed/30873701
ER  -
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