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Article Dans Une Revue Materials Horizons Année : 2023

Additive-free molecular acceptor organic solar cells processed from a biorenewable solvent approaching 15% efficiency

Zhifang Du
  • Fonction : Auteur
Hoang Mai Luong
  • Fonction : Auteur
Sina Sabury
  • Fonction : Auteur
Pattarawadee Therdkatanyuphong
  • Fonction : Auteur
Sangmin Chae
  • Fonction : Auteur
Austin L. Jones
  • Fonction : Auteur
Junxiang Zhang
  • Fonction : Auteur
Zhengxing Peng
  • Fonction : Auteur
Ziyue Zhu
  • Fonction : Auteur
Sadisha Nanayakkara
  • Fonction : Auteur
Veaceslav Coropceanu
  • Fonction : Auteur
Dylan G. Choi
  • Fonction : Auteur
Steven Xiao
  • Fonction : Auteur
Ahra Yi
  • Fonction : Auteur
Hyo Jung Kim
  • Fonction : Auteur
Jean-Luc Bredas
  • Fonction : Auteur
Harald Ade
  • Fonction : Auteur
Seth R. Marder
  • Fonction : Auteur
John R. Reynolds
  • Fonction : Auteur
Thuc-Quyen Nguyen
  • Fonction : Auteur

Résumé

We report on the use of molecular acceptors (MAs) and donor polymers processed with a biomass-derived solvent (2-methyltetrahydrofuran, 2-MeTHF) to facilitate bulk heterojunction (BHJ) organic photovoltaics (OPVs) with power conversion efficiency (PCE) approaching 15%. Our approach makes use of two newly designed donor polymers with an opened ring unit in their structures along with three molecular acceptors (MAs) where the backbone and sidechain were engineered to enhance the processability of BHJ OPVs using 2-MeTHF, as evaluated by an analysis of donor–acceptor (D–A) miscibility and interaction parameters. To understand the differences in the PCE values that ranged from 9–15% as a function of composition, the surface, bulk, and interfacial BHJ morphologies were characterized at different length scales using atomic force microscopy, grazing-incidence wide-angle X-ray scattering, resonant soft X-ray scattering, X-ray photoelectron spectroscopy, and 2D solid-state nuclear magnetic resonance spectroscopy. Our results indicate that the favorable D–A intermixing that occurs in the best performing BHJ film with an average domain size of ∼25 nm, high domain purity, uniform distribution and enhanced local packing interactions – facilitates charge generation and extraction while limiting the trap-assisted recombination process in the device, leading to high effective mobility and good performance.
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Dates et versions

hal-04530907 , version 1 (03-04-2024)

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Citer

Zhifang Du, Hoang Mai Luong, Sina Sabury, Pattarawadee Therdkatanyuphong, Sangmin Chae, et al.. Additive-free molecular acceptor organic solar cells processed from a biorenewable solvent approaching 15% efficiency. Materials Horizons, 2023, Materials Horizons, 10 (12), pp.5564-5576. ⟨10.1039/d3mh01133j⟩. ⟨hal-04530907⟩
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