A Simple n-Dopant Derived from Diquat Boosts the Efficiency of Organic Solar Cells to 18.3%

Yuanbao Lin; Mohamad Insan Nugraha; Yuliar Firdaus; Alberto Davide Scaccabarozzi; Filip Aniés; Abdul-Hamid M. Emwas; Emre Yengel; Xiaopeng Zheng; Jiakai Liu; Wandi Wahyudi; Emre Yarali; Hendrik Faber; Osman Bakr; Leonidas Tsetseris; Martin Heeney; Thomas D. Anthopoulos

doi:10.1021/acsenergylett.0c01949

A Simple n-Dopant Derived from Diquat Boosts the Efficiency of Organic Solar Cells to 18.3%

Yuanbao Lin, Mohamad Insan Nugraha, Yuliar Firdaus, Alberto Davide Scaccabarozzi, Filip Aniés, Abdul-Hamid M. Emwas, Emre Yengel, Xiaopeng Zheng, Jiakai Liu, Wandi Wahyudi, Emre Yarali, Hendrik Faber, Osman Bakr, Leonidas Tsetseris, Martin Heeney, Thomas D. Anthopoulos

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258 Scopus citations

Abstract

Molecular doping has recently been shown to improve the operating characteristics of organic photovoltaics (OPVs). Here, we prepare neutral Diquat (DQ) and use it as n-dopant to improve the performance of state-of-the-art OPVs. Adding DQ in ternary bulk-heterojunction (BHJ) cells based of PM6:Y6:PC71BM is found to consistently increase their power conversion efficiency (PCE) from 16.7 to 17.4%. Analyses of materials and devices reveal that DQ acts as n-type dopant and morphology modifier for the BHJ leading to observable changes in its surface topography. The resulting n-doped BHJs exhibit higher optical absorption coefficients, balanced ambipolar transport, longer carrier lifetimes and suppressed bimolecular recombination, which are ultimately responsible for the increased PCE. The use of DQ was successfully extended to OPVs based on PM6:BTP-eC9:PC71BM for which a maximum PCE of 18.3% (uncertified) was achieved. Our study highlights DQ as a promising dopant for application in next generation organic solar cells.

Original language	English (US)
Pages (from-to)	3663-3671
Number of pages	9
Journal	ACS Energy Letters
DOIs	https://doi.org/10.1021/acsenergylett.0c01949
State	Published - Oct 30 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-11-02
Acknowledged KAUST grant number(s): CRG, OSR2018-CARF/CCF-3079
Acknowledgements: This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OSR2018-CARF/CCF-3079, No. OSR-2019-CRG8-4095.3, and No. OSR-2020-CRG8-4095.2. GIWAXS experiments were performed at the BL11 NCD-SWEET beamline at the ALBA Synchrotron (Spain) with the collaboration of ALBA staff. L.T.
acknowledges support for the computational time granted from GRNET in the National HPC facility -ARIS - under project FRAME.

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10.1021/acsenergylett.0c01949

https://repository.kaust.edu.sa/bitstream/10754/665740/1/simple%20and.pdf

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Lin, Y., Nugraha, M. I., Firdaus, Y., Scaccabarozzi, A. D., Aniés, F., Emwas, A.-H. M., Yengel, E., Zheng, X., Liu, J., Wahyudi, W., Yarali, E., Faber, H., Bakr, O., Tsetseris, L., Heeney, M., & Anthopoulos, T. D. (2020). A Simple n-Dopant Derived from Diquat Boosts the Efficiency of Organic Solar Cells to 18.3%. ACS Energy Letters, 3663-3671. https://doi.org/10.1021/acsenergylett.0c01949

@article{3813b3945f3e4ccdbb9c85074433546c,

title = "A Simple n-Dopant Derived from Diquat Boosts the Efficiency of Organic Solar Cells to 18.3%",

abstract = "Molecular doping has recently been shown to improve the operating characteristics of organic photovoltaics (OPVs). Here, we prepare neutral Diquat (DQ) and use it as n-dopant to improve the performance of state-of-the-art OPVs. Adding DQ in ternary bulk-heterojunction (BHJ) cells based of PM6:Y6:PC71BM is found to consistently increase their power conversion efficiency (PCE) from 16.7 to 17.4%. Analyses of materials and devices reveal that DQ acts as n-type dopant and morphology modifier for the BHJ leading to observable changes in its surface topography. The resulting n-doped BHJs exhibit higher optical absorption coefficients, balanced ambipolar transport, longer carrier lifetimes and suppressed bimolecular recombination, which are ultimately responsible for the increased PCE. The use of DQ was successfully extended to OPVs based on PM6:BTP-eC9:PC71BM for which a maximum PCE of 18.3% (uncertified) was achieved. Our study highlights DQ as a promising dopant for application in next generation organic solar cells.",

author = "Yuanbao Lin and Nugraha, {Mohamad Insan} and Yuliar Firdaus and Scaccabarozzi, {Alberto Davide} and Filip Ani{\'e}s and Emwas, {Abdul-Hamid M.} and Emre Yengel and Xiaopeng Zheng and Jiakai Liu and Wandi Wahyudi and Emre Yarali and Hendrik Faber and Osman Bakr and Leonidas Tsetseris and Martin Heeney and Anthopoulos, {Thomas D.}",

note = "KAUST Repository Item: Exported on 2020-11-02 Acknowledged KAUST grant number(s): CRG, OSR2018-CARF/CCF-3079 Acknowledgements: This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OSR2018-CARF/CCF-3079, No. OSR-2019-CRG8-4095.3, and No. OSR-2020-CRG8-4095.2. GIWAXS experiments were performed at the BL11 NCD-SWEET beamline at the ALBA Synchrotron (Spain) with the collaboration of ALBA staff. L.T. acknowledges support for the computational time granted from GRNET in the National HPC facility -ARIS - under project FRAME.",

year = "2020",

month = oct,

day = "30",

doi = "10.1021/acsenergylett.0c01949",

language = "English (US)",

pages = "3663--3671",

journal = "ACS Energy Letters",

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Lin, Y, Nugraha, MI, Firdaus, Y, Scaccabarozzi, AD, Aniés, F, Emwas, A-HM, Yengel, E, Zheng, X, Liu, J, Wahyudi, W, Yarali, E, Faber, H , Bakr, O, Tsetseris, L, Heeney, M & Anthopoulos, TD 2020, 'A Simple n-Dopant Derived from Diquat Boosts the Efficiency of Organic Solar Cells to 18.3%', ACS Energy Letters, pp. 3663-3671. https://doi.org/10.1021/acsenergylett.0c01949

TY - JOUR

T1 - A Simple n-Dopant Derived from Diquat Boosts the Efficiency of Organic Solar Cells to 18.3%

AU - Lin, Yuanbao

AU - Nugraha, Mohamad Insan

AU - Firdaus, Yuliar

AU - Scaccabarozzi, Alberto Davide

AU - Aniés, Filip

AU - Emwas, Abdul-Hamid M.

AU - Yengel, Emre

AU - Zheng, Xiaopeng

AU - Liu, Jiakai

AU - Wahyudi, Wandi

AU - Yarali, Emre

AU - Faber, Hendrik

AU - Bakr, Osman

AU - Tsetseris, Leonidas

AU - Heeney, Martin

AU - Anthopoulos, Thomas D.

N1 - KAUST Repository Item: Exported on 2020-11-02 Acknowledged KAUST grant number(s): CRG, OSR2018-CARF/CCF-3079 Acknowledgements: This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OSR2018-CARF/CCF-3079, No. OSR-2019-CRG8-4095.3, and No. OSR-2020-CRG8-4095.2. GIWAXS experiments were performed at the BL11 NCD-SWEET beamline at the ALBA Synchrotron (Spain) with the collaboration of ALBA staff. L.T. acknowledges support for the computational time granted from GRNET in the National HPC facility -ARIS - under project FRAME.

PY - 2020/10/30

Y1 - 2020/10/30

N2 - Molecular doping has recently been shown to improve the operating characteristics of organic photovoltaics (OPVs). Here, we prepare neutral Diquat (DQ) and use it as n-dopant to improve the performance of state-of-the-art OPVs. Adding DQ in ternary bulk-heterojunction (BHJ) cells based of PM6:Y6:PC71BM is found to consistently increase their power conversion efficiency (PCE) from 16.7 to 17.4%. Analyses of materials and devices reveal that DQ acts as n-type dopant and morphology modifier for the BHJ leading to observable changes in its surface topography. The resulting n-doped BHJs exhibit higher optical absorption coefficients, balanced ambipolar transport, longer carrier lifetimes and suppressed bimolecular recombination, which are ultimately responsible for the increased PCE. The use of DQ was successfully extended to OPVs based on PM6:BTP-eC9:PC71BM for which a maximum PCE of 18.3% (uncertified) was achieved. Our study highlights DQ as a promising dopant for application in next generation organic solar cells.

AB - Molecular doping has recently been shown to improve the operating characteristics of organic photovoltaics (OPVs). Here, we prepare neutral Diquat (DQ) and use it as n-dopant to improve the performance of state-of-the-art OPVs. Adding DQ in ternary bulk-heterojunction (BHJ) cells based of PM6:Y6:PC71BM is found to consistently increase their power conversion efficiency (PCE) from 16.7 to 17.4%. Analyses of materials and devices reveal that DQ acts as n-type dopant and morphology modifier for the BHJ leading to observable changes in its surface topography. The resulting n-doped BHJs exhibit higher optical absorption coefficients, balanced ambipolar transport, longer carrier lifetimes and suppressed bimolecular recombination, which are ultimately responsible for the increased PCE. The use of DQ was successfully extended to OPVs based on PM6:BTP-eC9:PC71BM for which a maximum PCE of 18.3% (uncertified) was achieved. Our study highlights DQ as a promising dopant for application in next generation organic solar cells.

UR - http://hdl.handle.net/10754/665740

UR - https://pubs.acs.org/doi/10.1021/acsenergylett.0c01949

U2 - 10.1021/acsenergylett.0c01949

DO - 10.1021/acsenergylett.0c01949

M3 - Article

SN - 2380-8195

SP - 3663

EP - 3671

JO - ACS Energy Letters

JF - ACS Energy Letters

ER -

A Simple n-Dopant Derived from Diquat Boosts the Efficiency of Organic Solar Cells to 18.3%

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