Effect of fullerene acceptor on the performance of solar cells based on PffBT4T-2OD

Yiwei Zhang; Andrew J. Parnell; Oskar Blaszczyk; Andrew J. Musser; Ifor D.W. Samuel; David G. Lidzey; Gabriel Bernardo

doi:10.1039/c8cp02195c

Effect of fullerene acceptor on the performance of solar cells based on PffBT4T-2OD

Yiwei Zhang, Andrew J. Parnell, Oskar Blaszczyk, Andrew J. Musser, Ifor D.W. Samuel^*, David G. Lidzey, Gabriel Bernardo

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We have studied bulk-heterojunction (BHJ) solar cells composed of the polymer PffBT4T-2OD as electron donor and three different electron accepting fullerenes, namely PC₇₁BM, PC₆₁BM and indene-C₆₀-bis-adduct (ICBA) in order to understand the impact of different fullerenes on the morphology and efficiency of the corresponding photovoltaic devices. Despite PffBT4T-2OD:ICBA devices being characterised by higher values of V_oc, they display the lowest power conversion efficiency (PCE) due to their lower J_sc and FF values. We find that although all blend films have similar morphologies, X-ray scattering indicates a reduced degree of order within the fullerene domains in the ICBA-based film. Due to the high LUMO level of ICBA, the corresponding blends are characterised by a lower initial exciton dissociation and this associated with the reduced ordering within the ICBA domains results in increased geminate recombination of the photogenerated electrons in the fullerene-rich domains and a consequently reduced PCE of the corresponding devices.

Original language	English
Pages (from-to)	19023-19029
Number of pages	7
Journal	Physical Chemistry Chemical Physics
Volume	20
Issue number	28
Early online date	26 Jun 2018
DOIs	https://doi.org/10.1039/c8cp02195c
Publication status	Published - 28 Jul 2018

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Zhang_2018_PCCP_Fullereneacceptor_AAM
© 2018 The Author(s). This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at: https://doi.org/10.1039/C8CP02195C
Accepted author manuscript, 2.29 MB

Hybrid Polaritonics: Hybrid Polaritonics
Samuel, I. D. W. (PI), Höfling, S. (CoI), Keeling, J. M. J. (CoI) & Turnbull, G. (CoI)
EPSRC
1/09/15 → 31/08/20
Project: Standard
ERC Advanced Grant EXCITON: EU FP7 ERC Advanced Grant 2012 EXCITON
Samuel, I. D. W. (PI)
European Research Council
1/04/13 → 30/03/19
Project: Standard

Effect of fullerene acceptor on the performance of solar cells based on PffBT4T-2OD (dataset)
Zhang, Y. (Data Collector), Parnell, A. J. (Creator), Blaszczyk, O. (Creator), Musser, A. J. (Creator), Samuel, I. D. W. (Data Collector), Lidzey, D. G. (Creator) & Bernardo, G. (Creator), University of St Andrews, 7 Sept 2018
DOI: 10.17630/ab9cb624-b975-4939-85a5-7893d8f1cf52
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title = "Effect of fullerene acceptor on the performance of solar cells based on PffBT4T-2OD",

abstract = "We have studied bulk-heterojunction (BHJ) solar cells composed of the polymer PffBT4T-2OD as electron donor and three different electron accepting fullerenes, namely PC71BM, PC61BM and indene-C60-bis-adduct (ICBA) in order to understand the impact of different fullerenes on the morphology and efficiency of the corresponding photovoltaic devices. Despite PffBT4T-2OD:ICBA devices being characterised by higher values of Voc, they display the lowest power conversion efficiency (PCE) due to their lower Jsc and FF values. We find that although all blend films have similar morphologies, X-ray scattering indicates a reduced degree of order within the fullerene domains in the ICBA-based film. Due to the high LUMO level of ICBA, the corresponding blends are characterised by a lower initial exciton dissociation and this associated with the reduced ordering within the ICBA domains results in increased geminate recombination of the photogenerated electrons in the fullerene-rich domains and a consequently reduced PCE of the corresponding devices.",

author = "Yiwei Zhang and Parnell, {Andrew J.} and Oskar Blaszczyk and Musser, {Andrew J.} and Samuel, {Ifor D.W.} and Lidzey, {David G.} and Gabriel Bernardo",

note = "Y. Z., O. B., and I. D. W. S. acknowledge financial support from the European Research Council (EXCITON grant 321305). I. D. W. S. acknowledges a Royal Society Wolfson Research Merit Award. G. B. thanks the European Commission for a Marie Sklodowska Curie Individual Fellowship (FP7/H2020 – Grant agreement number: 658391). We thank the EPSRC for financial support via grants EP/I028641/1 “Polymer/fullerene photovoltaic devices: new materials and innovative processes for high-volume manufacture”, EP/J017361/1 “Supergen Supersolar Hub”, EP/M025020/1 “High resolution mapping of performance and degradation mechanisms in printable photovoltaic devices” and EP/M025330/1, “Hybrid Polaritonics”. ",

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AU - Zhang, Yiwei

AU - Parnell, Andrew J.

AU - Blaszczyk, Oskar

AU - Musser, Andrew J.

AU - Samuel, Ifor D.W.

AU - Lidzey, David G.

AU - Bernardo, Gabriel

N1 - Y. Z., O. B., and I. D. W. S. acknowledge financial support from the European Research Council (EXCITON grant 321305). I. D. W. S. acknowledges a Royal Society Wolfson Research Merit Award. G. B. thanks the European Commission for a Marie Sklodowska Curie Individual Fellowship (FP7/H2020 – Grant agreement number: 658391). We thank the EPSRC for financial support via grants EP/I028641/1 “Polymer/fullerene photovoltaic devices: new materials and innovative processes for high-volume manufacture”, EP/J017361/1 “Supergen Supersolar Hub”, EP/M025020/1 “High resolution mapping of performance and degradation mechanisms in printable photovoltaic devices” and EP/M025330/1, “Hybrid Polaritonics”.

PY - 2018/7/28

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N2 - We have studied bulk-heterojunction (BHJ) solar cells composed of the polymer PffBT4T-2OD as electron donor and three different electron accepting fullerenes, namely PC71BM, PC61BM and indene-C60-bis-adduct (ICBA) in order to understand the impact of different fullerenes on the morphology and efficiency of the corresponding photovoltaic devices. Despite PffBT4T-2OD:ICBA devices being characterised by higher values of Voc, they display the lowest power conversion efficiency (PCE) due to their lower Jsc and FF values. We find that although all blend films have similar morphologies, X-ray scattering indicates a reduced degree of order within the fullerene domains in the ICBA-based film. Due to the high LUMO level of ICBA, the corresponding blends are characterised by a lower initial exciton dissociation and this associated with the reduced ordering within the ICBA domains results in increased geminate recombination of the photogenerated electrons in the fullerene-rich domains and a consequently reduced PCE of the corresponding devices.

AB - We have studied bulk-heterojunction (BHJ) solar cells composed of the polymer PffBT4T-2OD as electron donor and three different electron accepting fullerenes, namely PC71BM, PC61BM and indene-C60-bis-adduct (ICBA) in order to understand the impact of different fullerenes on the morphology and efficiency of the corresponding photovoltaic devices. Despite PffBT4T-2OD:ICBA devices being characterised by higher values of Voc, they display the lowest power conversion efficiency (PCE) due to their lower Jsc and FF values. We find that although all blend films have similar morphologies, X-ray scattering indicates a reduced degree of order within the fullerene domains in the ICBA-based film. Due to the high LUMO level of ICBA, the corresponding blends are characterised by a lower initial exciton dissociation and this associated with the reduced ordering within the ICBA domains results in increased geminate recombination of the photogenerated electrons in the fullerene-rich domains and a consequently reduced PCE of the corresponding devices.

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JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

IS - 28

ER -

Effect of fullerene acceptor on the performance of solar cells based on PffBT4T-2OD

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Projects

Hybrid Polaritonics: Hybrid Polaritonics

ERC Advanced Grant EXCITON: EU FP7 ERC Advanced Grant 2012 EXCITON

Datasets

Effect of fullerene acceptor on the performance of solar cells based on PffBT4T-2OD (dataset)

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