Influence of static disorder of charge transfer state on voltage loss in organic photovoltaics

Jun Yan; Elham Rezasoltani; Mohammed Azzouzi; Flurin Eisner; Jenny Nelson

doi:10.1038/s41467-021-23975-3

Influence of static disorder of charge transfer state on voltage loss in organic photovoltaics

Jun Yan, Elham Rezasoltani, Mohammed Azzouzi, Flurin Eisner, Jenny Nelson

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

47 Scopus citations

Abstract

AbstractSpectroscopic measurements of charge transfer (CT) states provide valuable insight into the voltage losses in organic photovoltaics (OPVs). Correct interpretation of CT-state spectra depends on knowledge of the underlying broadening mechanisms, and the relative importance of molecular vibrational broadening and variations in the CT-state energy (static disorder). Here, we present a physical model, that obeys the principle of detailed balance between photon absorption and emission, of the impact of CT-state static disorder on voltage losses in OPVs. We demonstrate that neglect of CT-state disorder in the analysis of spectra may lead to incorrect estimation of voltage losses in OPV devices. We show, using measurements of polymer:non-fullerene blends of different composition, how our model can be used to infer variations in CT-state energy distribution that result from variations in film microstructure. This work highlights the potential impact of static disorder on the characteristics of disordered organic blend devices.

Original language	English (US)
Journal	Nature Communications
Volume	12
Issue number	1
DOIs	https://doi.org/10.1038/s41467-021-23975-3
State	Published - Jun 15 2021
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2021-06-21
Acknowledgements: J.N., J.Y., E.R., M.A. and F.D.E. thank the European Research Council for support under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 742708). E.R. is grateful to the Fonds de Recherche du Quebec-Nature et technologies (FRQNT) for a postdoctoral fellowship and acknowledges financial support from the European Cooperation in Science and Technology. M.A. thanks the Engineering and Physical Sciences Research Council (EPSRC) for support via doctoral studentships. F.E. thanks the Engineering and Physical Sciences Research Council (EPSRC) for support via the Post-Doctoral Prize Fellowship. We thank Dr. Andrew Wadsworth from Department of Chemistry at Imperial College London and Prof. Iain McCulloch from KAUST Solar Center (KSC) at King Abdullah University of Science and Technology, for providing materials O-IDTBR and O-IDTBR, and extra support of O-IDFBR by Joel Luke from Department of Physics at Imperial College London. J.Y. thank Beverly Ge for her support.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

General Biochemistry, Genetics and Molecular Biology
General Chemistry
General Physics and Astronomy

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10.1038/s41467-021-23975-3

Cite this

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title = "Influence of static disorder of charge transfer state on voltage loss in organic photovoltaics",

abstract = "AbstractSpectroscopic measurements of charge transfer (CT) states provide valuable insight into the voltage losses in organic photovoltaics (OPVs). Correct interpretation of CT-state spectra depends on knowledge of the underlying broadening mechanisms, and the relative importance of molecular vibrational broadening and variations in the CT-state energy (static disorder). Here, we present a physical model, that obeys the principle of detailed balance between photon absorption and emission, of the impact of CT-state static disorder on voltage losses in OPVs. We demonstrate that neglect of CT-state disorder in the analysis of spectra may lead to incorrect estimation of voltage losses in OPV devices. We show, using measurements of polymer:non-fullerene blends of different composition, how our model can be used to infer variations in CT-state energy distribution that result from variations in film microstructure. This work highlights the potential impact of static disorder on the characteristics of disordered organic blend devices.",

author = "Jun Yan and Elham Rezasoltani and Mohammed Azzouzi and Flurin Eisner and Jenny Nelson",

note = "KAUST Repository Item: Exported on 2021-06-21 Acknowledgements: J.N., J.Y., E.R., M.A. and F.D.E. thank the European Research Council for support under the European Union{\textquoteright}s Horizon 2020 research and innovation program (Grant Agreement No. 742708). E.R. is grateful to the Fonds de Recherche du Quebec-Nature et technologies (FRQNT) for a postdoctoral fellowship and acknowledges financial support from the European Cooperation in Science and Technology. M.A. thanks the Engineering and Physical Sciences Research Council (EPSRC) for support via doctoral studentships. F.E. thanks the Engineering and Physical Sciences Research Council (EPSRC) for support via the Post-Doctoral Prize Fellowship. We thank Dr. Andrew Wadsworth from Department of Chemistry at Imperial College London and Prof. Iain McCulloch from KAUST Solar Center (KSC) at King Abdullah University of Science and Technology, for providing materials O-IDTBR and O-IDTBR, and extra support of O-IDFBR by Joel Luke from Department of Physics at Imperial College London. J.Y. thank Beverly Ge for her support. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

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AU - Nelson, Jenny

N1 - KAUST Repository Item: Exported on 2021-06-21 Acknowledgements: J.N., J.Y., E.R., M.A. and F.D.E. thank the European Research Council for support under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 742708). E.R. is grateful to the Fonds de Recherche du Quebec-Nature et technologies (FRQNT) for a postdoctoral fellowship and acknowledges financial support from the European Cooperation in Science and Technology. M.A. thanks the Engineering and Physical Sciences Research Council (EPSRC) for support via doctoral studentships. F.E. thanks the Engineering and Physical Sciences Research Council (EPSRC) for support via the Post-Doctoral Prize Fellowship. We thank Dr. Andrew Wadsworth from Department of Chemistry at Imperial College London and Prof. Iain McCulloch from KAUST Solar Center (KSC) at King Abdullah University of Science and Technology, for providing materials O-IDTBR and O-IDTBR, and extra support of O-IDFBR by Joel Luke from Department of Physics at Imperial College London. J.Y. thank Beverly Ge for her support. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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N2 - AbstractSpectroscopic measurements of charge transfer (CT) states provide valuable insight into the voltage losses in organic photovoltaics (OPVs). Correct interpretation of CT-state spectra depends on knowledge of the underlying broadening mechanisms, and the relative importance of molecular vibrational broadening and variations in the CT-state energy (static disorder). Here, we present a physical model, that obeys the principle of detailed balance between photon absorption and emission, of the impact of CT-state static disorder on voltage losses in OPVs. We demonstrate that neglect of CT-state disorder in the analysis of spectra may lead to incorrect estimation of voltage losses in OPV devices. We show, using measurements of polymer:non-fullerene blends of different composition, how our model can be used to infer variations in CT-state energy distribution that result from variations in film microstructure. This work highlights the potential impact of static disorder on the characteristics of disordered organic blend devices.

AB - AbstractSpectroscopic measurements of charge transfer (CT) states provide valuable insight into the voltage losses in organic photovoltaics (OPVs). Correct interpretation of CT-state spectra depends on knowledge of the underlying broadening mechanisms, and the relative importance of molecular vibrational broadening and variations in the CT-state energy (static disorder). Here, we present a physical model, that obeys the principle of detailed balance between photon absorption and emission, of the impact of CT-state static disorder on voltage losses in OPVs. We demonstrate that neglect of CT-state disorder in the analysis of spectra may lead to incorrect estimation of voltage losses in OPV devices. We show, using measurements of polymer:non-fullerene blends of different composition, how our model can be used to infer variations in CT-state energy distribution that result from variations in film microstructure. This work highlights the potential impact of static disorder on the characteristics of disordered organic blend devices.

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Influence of static disorder of charge transfer state on voltage loss in organic photovoltaics

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