Exploiting ternary blends for improved photostability in high efficiency organic solar cells

Nicola Gasparini; Sri Harish Kumar Paleti; Jules Bertrandie; Guilong Cai; Guichuan Zhang; Andrew Wadsworth; Xinhui Lu; Hin-Lap Yip; Iain McCulloch; Derya Baran

doi:10.1021/acsenergylett.0c00604

Exploiting ternary blends for improved photostability in high efficiency organic solar cells

Nicola Gasparini, Sri Harish Kumar Paleti, Jules Bertrandie, Guilong Cai, Guichuan Zhang, Andrew Wadsworth, Xinhui Lu, Hin-Lap Yip, Iain McCulloch, Derya Baran

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

139 Scopus citations

Abstract

Ternary organic solar cells based on polymer donor and nonfullerene acceptors (NFAs) are delivering high power conversion efficiencies (PCE). Now, further improvement needs to be directed to enhance the operational lifetime of organic photovoltaics. Here, we selected three NFAs with different electron affinities and structural properties and found that the most crystalline third component, O-IDTBR, is selectively miscible within the acceptor phase. This reduced trap-assisted recombination and delivered a PCE of 16.6% and a fill factor of 0.76, compared to PM6:Y6 binary devices (15.2% PCE). Charge transport and recombination analyses revealed that O-IDTBR acts as a charge relay for improved charge transfer of both donor and acceptor materials leading to a more ordered transport. We find that minimizing traps formation in ternary devices deactivates light-induced traps upon full sun illumination (AM1.5G). As a result, ternary devices do not show any PCE drop in 225h, in comparison to binary cells which lose more than 60% of their initial performances

Original language	English (US)
Journal	ACS Energy Letters
DOIs	https://doi.org/10.1021/acsenergylett.0c00604
State	Published - Mar 31 2020

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10.1021/acsenergylett.0c00604

https://repository.kaust.edu.sa/bitstream/10754/662436/1/E_explointing.pdf

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@article{b5d32f41a97745b7861583660cef778e,

title = "Exploiting ternary blends for improved photostability in high efficiency organic solar cells",

abstract = "Ternary organic solar cells based on polymer donor and nonfullerene acceptors (NFAs) are delivering high power conversion efficiencies (PCE). Now, further improvement needs to be directed to enhance the operational lifetime of organic photovoltaics. Here, we selected three NFAs with different electron affinities and structural properties and found that the most crystalline third component, O-IDTBR, is selectively miscible within the acceptor phase. This reduced trap-assisted recombination and delivered a PCE of 16.6% and a fill factor of 0.76, compared to PM6:Y6 binary devices (15.2% PCE). Charge transport and recombination analyses revealed that O-IDTBR acts as a charge relay for improved charge transfer of both donor and acceptor materials leading to a more ordered transport. We find that minimizing traps formation in ternary devices deactivates light-induced traps upon full sun illumination (AM1.5G). As a result, ternary devices do not show any PCE drop in 225h, in comparison to binary cells which lose more than 60% of their initial performances",

author = "Nicola Gasparini and Paleti, {Sri Harish Kumar} and Jules Bertrandie and Guilong Cai and Guichuan Zhang and Andrew Wadsworth and Xinhui Lu and Hin-Lap Yip and Iain McCulloch and Derya Baran",

note = "KAUST Repository Item: Exported on 2020-10-01 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. H.-L. Yip acknowledges the Ministry of Science and Technology (No. 2019YFA0705900) for financial support. N.Gasparini and S.H.K. Paleti contributed equally in this work.",

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day = "31",

doi = "10.1021/acsenergylett.0c00604",

language = "English (US)",

journal = "ACS Energy Letters",

issn = "2380-8195",

publisher = "American Chemical Society",

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T1 - Exploiting ternary blends for improved photostability in high efficiency organic solar cells

AU - Gasparini, Nicola

AU - Paleti, Sri Harish Kumar

AU - Bertrandie, Jules

AU - Cai, Guilong

AU - Zhang, Guichuan

AU - Wadsworth, Andrew

AU - Lu, Xinhui

AU - Yip, Hin-Lap

AU - McCulloch, Iain

AU - Baran, Derya

N1 - KAUST Repository Item: Exported on 2020-10-01 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. H.-L. Yip acknowledges the Ministry of Science and Technology (No. 2019YFA0705900) for financial support. N.Gasparini and S.H.K. Paleti contributed equally in this work.

PY - 2020/3/31

Y1 - 2020/3/31

N2 - Ternary organic solar cells based on polymer donor and nonfullerene acceptors (NFAs) are delivering high power conversion efficiencies (PCE). Now, further improvement needs to be directed to enhance the operational lifetime of organic photovoltaics. Here, we selected three NFAs with different electron affinities and structural properties and found that the most crystalline third component, O-IDTBR, is selectively miscible within the acceptor phase. This reduced trap-assisted recombination and delivered a PCE of 16.6% and a fill factor of 0.76, compared to PM6:Y6 binary devices (15.2% PCE). Charge transport and recombination analyses revealed that O-IDTBR acts as a charge relay for improved charge transfer of both donor and acceptor materials leading to a more ordered transport. We find that minimizing traps formation in ternary devices deactivates light-induced traps upon full sun illumination (AM1.5G). As a result, ternary devices do not show any PCE drop in 225h, in comparison to binary cells which lose more than 60% of their initial performances

AB - Ternary organic solar cells based on polymer donor and nonfullerene acceptors (NFAs) are delivering high power conversion efficiencies (PCE). Now, further improvement needs to be directed to enhance the operational lifetime of organic photovoltaics. Here, we selected three NFAs with different electron affinities and structural properties and found that the most crystalline third component, O-IDTBR, is selectively miscible within the acceptor phase. This reduced trap-assisted recombination and delivered a PCE of 16.6% and a fill factor of 0.76, compared to PM6:Y6 binary devices (15.2% PCE). Charge transport and recombination analyses revealed that O-IDTBR acts as a charge relay for improved charge transfer of both donor and acceptor materials leading to a more ordered transport. We find that minimizing traps formation in ternary devices deactivates light-induced traps upon full sun illumination (AM1.5G). As a result, ternary devices do not show any PCE drop in 225h, in comparison to binary cells which lose more than 60% of their initial performances

UR - http://hdl.handle.net/10754/662436

UR - https://pubs.acs.org/doi/10.1021/acsenergylett.0c00604

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M3 - Article

SN - 2380-8195

JO - ACS Energy Letters

JF - ACS Energy Letters

ER -

Exploiting ternary blends for improved photostability in high efficiency organic solar cells

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