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

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Listed:
  • Jun Yan

    (Imperial College London)

  • Elham Rezasoltani

    (Imperial College London)

  • Mohammed Azzouzi

    (Imperial College London)

  • Flurin Eisner

    (Imperial College London)

  • Jenny Nelson

    (Imperial College London)

Abstract

Spectroscopic 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.

Suggested Citation

  • Jun Yan & Elham Rezasoltani & Mohammed Azzouzi & Flurin Eisner & Jenny Nelson, 2021. "Influence of static disorder of charge transfer state on voltage loss in organic photovoltaics," Nature Communications, Nature, vol. 12(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23975-3
    DOI: 10.1038/s41467-021-23975-3
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    Cited by:

    1. Zhenrong Jia & Qing Ma & Zeng Chen & Lei Meng & Nakul Jain & Indunil Angunawela & Shucheng Qin & Xiaolei Kong & Xiaojun Li & Yang (Michael) Yang & Haiming Zhu & Harald Ade & Feng Gao & Yongfang Li, 2023. "Near-infrared absorbing acceptor with suppressed triplet exciton generation enabling high performance tandem organic solar cells," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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