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{Jamieson:2012,
author = {Jamieson, FC and Domingo, EB and McCarthy-Ward, T and Heeney, M and Stingelin, N and Durrant, JR},
journal = {Chemical Science},
pages = {485--492},
title = {Fullerene crystallisation as a key driver of charge separation in polymer/fullerene bulk heterojunction solar cells},
url = {http://dx.doi.org/10.1039/C1SC00674F},
volume = {3},
year = {2012}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Solution processed polymer/fullerene blend films are receiving extensive attention as the photoactive layer of organic solar cells. In this paper we report a range of photophysical, electrochemical, physicochemical and structural data which provide evidence that formation of a relatively pure, molecularly ordered phase of the fullerene component, phenyl-C61-butyric acid methyl ester (PCBM), may be the key factor driving the spatial separation of photogenerated electrons and holes in many of these devices. PCBM crystallisation is shown to result in an increase in its electron affinity, providing an energetic driving force for spatial separation of electrons and holes. Based upon our observations, we propose a functional model applicable to many organic bulk heterojunction devices based upon charge generation in a finely intermixed polymer/fullerene phase followed by spatial separation of electrons and holes at the interface of this mixed phase with crystalline PCBM domains. This model has significant implications for the design of alternative acceptor materials to PCBM for organic solar cells.
AU - Jamieson,FC
AU - Domingo,EB
AU - McCarthy-Ward,T
AU - Heeney,M
AU - Stingelin,N
AU - Durrant,JR
EP - 492
PY - 2012///
SN - 2041-6520
SP - 485
TI - Fullerene crystallisation as a key driver of charge separation in polymer/fullerene bulk heterojunction solar cells
T2 - Chemical Science
UR - http://dx.doi.org/10.1039/C1SC00674F
VL - 3
ER -