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

A dendritic hexamer acceptor enables 19.4% efficiency with exceptional stability in organic solar cells DOI Creative Commons
Tao Jia, Tao Lin, Yang Yang

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 20, 2025

Language: Английский

Citations

2
Achieving 20% Toluene-Processed Binary Organic Solar Cells via Secondary Regulation of Donor Aggregation in Sequential Processing DOI Creative Commons
Yufei Wang,

Chuanlin Gao,

Wen Lei

et al.

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: April 1, 2025

Sequential processing (SqP) of the active layer offers independent optimization donor and acceptor with more targeted solvent design, which is considered most promising strategy for achieving efficient organic solar cells (OSCs). In SqP method, favorable interpenetrating network seriously depends on fine control bottom swelling. However, choice solvent(s) both have been mostly based a trial-and-error manner. A single often cannot achieve sufficient yet not excessive swelling, has long difficulty in high OSCs. Herein, two new isomeric molecules are introduced to fine-tune nucleation crystallization dynamics that allows judicious over swelling layer. The strong non-covalent interaction between molecule materials provides an excellent driving force optimize swelling-process. Among them, dipole moment promotes earlier PM6 extended time during SqP, improving bulk morphology vertical phase segregation. As result, champion efficiencies 17.38% 20.00% (certified 19.70%) achieved PM6/PYF-T-o (all-polymer) PM6/BTP-eC9 devices casted by toluene solvent.

Language: Английский

Citations

0
Triplet State Suppression for Energy Loss Reduction in 20% Nonhalogenated Solvent Processed Binary Organic Solar Cells DOI Creative Commons
Ruijie Ma, Bosen Zou, Yulong Hai

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract Boosting power conversion efficiency (PCE) of organic solar cells (OSCs) has been restricted by its undesirably high energy loss, especially for those nonhalogenated solvent‐processed ones. Here,a dichloro‐methoxylated terminal group in an asymmetric small molecular acceptor design, which realizes a significantly reduced non‐radiative loss (0.179 eV) compared to symmetric counterpart (0.202 eV), is reported. Consequently, the device improved up 20% PM6:BTP‐eC9‐4ClO, without sacrificing photon harvest or charge transport ability control system PM6:BTP‐eC9. Further characterizations reveal BTP‐eC9‐4ClO's blend film demonstrates suppressed triplet state formation, enabled enhanced electron delocalization. In addition, BTP‐eC9‐4ClO found be thermally stabler than BTP‐eC9, and thus providing stability, whose T80 value reaches > 7800 h under 80 °C anneal N 2 via linear extrapolation. This work represents state‐of‐the‐art performance binary OSCs with certified results (19.45%).

Language: Английский

Citations

0
Efficient Perovskite/Organic Tandem Photovoltaic Devices and Large‐area Modules Featuring Thick‐Film Organic Solar Cells DOI
Chen Xu, Ziyan Jia, Zeng Chen

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

Abstract Perovskite‐organic tandem solar cells (TSCs) possess significant potential due to their unique features, such as orthogonal processing solvents, tunable bandgap, and infinite molecular designs. However, device performance is often hindered by the limited series current density, which constrained absorption of rear organic cell (OSC). Here, a fine‐grained sub‐cell matching model has been developed that enables rapid screening material combinations based on practical parameters. The indicates increasing thickness OSC layer an effective approach boost efficiency, while also reducing manufacturing challenges for large‐scale production. To mitigate charge collection issues arising from excessive thickness, contact passivation technique self‐assembled monolayer developed, minimizes non‐radiative recombination reduces Schottky barrier at interface, enabling more balanced hole‐electron transport. As result, thick‐film (300 nm) achieved record‐high efficiency 18.08% (certified 17.80%), enhancing TSCs 24.31% 24.00%). Furthermore, large‐area photovoltaic module with exceeding 18.54% (18.48 cm 2 ) demonstrated. knowledge, this represents first demonstration perovskite‐organic TSCs.

Language: Английский

Citations

0
17.2% Efficiency for Completely Non‐Fused Acceptor Organic Solar Cells Via Re‐Intermixing Strategy in D/A Stratified Active Layer DOI Creative Commons

Xiyun Xie,

Ruijie Ma, Sen Zhang

et al.

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

Published: Sept. 9, 2024

Abstract Pursuing power conversion efficiency (PCE) is the priority of developing organic solar cells (OSCs) based on low‐cost completely non‐fused ring acceptors. Herein, a donor/acceptor re‐intermixing strategy to enhance photon capturing process, previously established well‐stratified active layer morphology reported. By adding 20 wt% PTQ10 (polymer donor) into acceptor's precursor, device PCE increased 16.03% from 15.11% D18/A4T‐16 control system, which attributed additional charge generation interface and suppressed bimolecular recombination. On contrary, using equal ratio PM6 leads significant loss, indicating importance considering vertical distribution perspective thermodynamics. Moreover, cutting‐edge level 17.21% for acceptor systems realized by altering PBQx‐TF/TBT‐26 PTQ11, via identical processing strategy. This work thus presents attractive engineering cell performance, as well in‐depth understanding.

Language: Английский

Citations

3
Blended solvent for tuning vertical phase separation in layer-by-layer processed thick-film organic solar cells DOI Creative Commons
Wenlong Liu,

Jieni Chen,

Xian Tang

et al.

Science China Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 25, 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