Improving Molecular Arrangement and Alleviating Nonradiative Energy Loss Using a Chlorinated Pyrido[3,4‐b]Quinoxaline‐Core‐Based Acceptor for High‐Performance Organic Solar Cells DOI
Tian Han, Yongmin Luo, Zhanxiang Chen

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

Abstract The electron‐deficient A 1 unit in A‐DA D‐A structured acceptors is critical for optimizing the efficiency of organic solar cells (OSCs). Drawing inspiration from high performance previously reported pyrido[2,3‐ b ]quinoxaline‐core acceptors, Py6, an isomer Py1 designed with a repositioned pyridine nitrogen atom, and further modified it by chlorinating Py6 to create Py7. Theoretical calculations show that chlorine incorporation strengthens intermolecular non‐covalent interactions promotes tighter molecular stacking, as confirmed grazing‐incidence wide‐angle X‐ray scattering. Consequently, D18/Py7 device delivers enhanced fill factor short‐circuit current density, compared D18/Py1 D18/Py6 device. Notably, also yields higher open‐circuit voltage 0.871 V, significantly outperforming (0.764 V) (0.723 V), due low nonradiative energy losses. Further studies reveal introducing Cl directs hole density toward central pyrido[3,4‐ ]quinoxaline decreases charge transfer state ratio D18/acceptor. This prompts triplet‐to‐singlet conversion reduces non‐radiative recombination Additionally, using mutual donor–acceptor dilution strategy, (D18:1wt.% Py7)/(Py7:1wt.% D18) achieves impressive 19.60%. work emphasizes great potential Py‐series demonstrates effectively

Language: Английский

Asymmetric fluorinated 2,3-bis(5-arylthiophen-2-yl)quinoxalines: Synthesis and photophysical properties DOI

Alexandra E. Kopotilova,

Marya A. Ivan’kina,

Еkaterina S. Starnovskaya

et al.

Journal of Photochemistry and Photobiology A Chemistry, Journal Year: 2024, Volume and Issue: unknown, P. 116161 - 116161

Published: Nov. 1, 2024

Language: Английский

Citations

0
Improving Molecular Arrangement and Alleviating Nonradiative Energy Loss Using a Chlorinated Pyrido[3,4‐b]Quinoxaline‐Core‐Based Acceptor for High‐Performance Organic Solar Cells DOI
Tian Han, Yongmin Luo, Zhanxiang Chen

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

Abstract The electron‐deficient A 1 unit in A‐DA D‐A structured acceptors is critical for optimizing the efficiency of organic solar cells (OSCs). Drawing inspiration from high performance previously reported pyrido[2,3‐ b ]quinoxaline‐core acceptors, Py6, an isomer Py1 designed with a repositioned pyridine nitrogen atom, and further modified it by chlorinating Py6 to create Py7. Theoretical calculations show that chlorine incorporation strengthens intermolecular non‐covalent interactions promotes tighter molecular stacking, as confirmed grazing‐incidence wide‐angle X‐ray scattering. Consequently, D18/Py7 device delivers enhanced fill factor short‐circuit current density, compared D18/Py1 D18/Py6 device. Notably, also yields higher open‐circuit voltage 0.871 V, significantly outperforming (0.764 V) (0.723 V), due low nonradiative energy losses. Further studies reveal introducing Cl directs hole density toward central pyrido[3,4‐ ]quinoxaline decreases charge transfer state ratio D18/acceptor. This prompts triplet‐to‐singlet conversion reduces non‐radiative recombination Additionally, using mutual donor–acceptor dilution strategy, (D18:1wt.% Py7)/(Py7:1wt.% D18) achieves impressive 19.60%. work emphasizes great potential Py‐series demonstrates effectively

Language: Английский

Citations

0