Chiral Steric Effect for Improved Phase Transition and Exciton Dynamics in Efficient and Stable All‐Polymer Solar Cells DOI
Wenqing Zhang, Renjie Hu,

Zhen Fu

et al.

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

Published: Dec. 6, 2024

Abstract Chiral materials exhibit distinctive properties that improve the performance of organic solar cells (OSCs). In this study, chiral PM6 is integrated into PM6:PY‐IT blends to fabricate quasi‐binary OSCs (cOSCs). The produced devices displayed an increased short‐circuit current and fill factor, achieving a peak efficiency 16.60% compared 15.96% for standard cell. Additionally, incorporation significantly enhanced thermal stability, with cOSCs retaining over 80% their initial after 1000 h operation. steric effect altered molecular packing, thereby improving overall crystallinity. optimized nanoscale domain morphology resulted in more effective blend film, leading superior device performance. Moreover, chirality‐induced orbital angular momentum ratio triplet states, which key factor increasing photocurrent OSCs. delocalization electron wavefunctions driven by effects, it diminished Coulomb attraction between interfacial electron–hole pairs, efficient charge generation. This study provides valuable insights role chirality optimizing both stability

Language: Английский

Precisely Controlling Polymer Acceptors with Weak Intramolecular Charge Transfer Effect and Superior Coplanarity for Efficient Indoor All‐Polymer Solar Cells with over 27% Efficiency DOI Creative Commons
Bosen Zou,

Ho Ming Ng,

Han Yu

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(32)

Published: May 28, 2024

Abstract Indoor photovoltaics (IPVs) are garnering increasing attention from both the academic and industrial communities due to pressing demand of ecosystem Internet‐of‐Things. All‐polymer solar cells (all‐PSCs), emerging as a sub‐type organic photovoltaics, with merits great film‐forming properties, remarkable morphological light stability, hold promise simultaneously achieve high efficiency long‐term operation in IPV's application. However, dearth polymer acceptors medium‐bandgap has impeded rapid development indoor all‐PSCs. Herein, highly efficient acceptor (PYFO‐V) is reported through synergistic effects side chain engineering linkage modulation applied for all‐PSCs operation. As result, PM6:PYFO‐V‐based all‐PSC yields highest 27.1% under LED condition, marking value binary date. More importantly, blade‐coated devices using non‐halogenated solvent ( o ‐xylene) maintain an over 23%, demonstrating potential industry‐scale fabrication. This work not only highlights importance fine‐tuning intramolecular charge transfer effect intrachain coplanarity developing high‐performance but also provides strategy

Language: Английский

Citations

20
Coplanar Dimeric Acceptors with Bathochromic Absorption and Torsion‐Free Backbones through Precise Fluorination Enabling Efficient Organic Photovoltaics with 18.63% Efficiency DOI Creative Commons
Wei Liu, Weiwei Wu, Aleksandr A. Sergeev

et al.

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

Published: Jan. 20, 2025

Abstract Giant dimeric acceptors (GDAs), a sub‐type of acceptor materials for organic solar cells (OSCs), have garnered much attention due to the synergistic advantages their monomeric and polymeric acceptors, forming well‐defined molecular structure with giant weight high efficiency stability. In this study, first time, two new GDAs, DYF‐V DY2F‐V are designed synthesized OSC operation, by connecting one vinylene linker mono‐/di‐fluorinated end group on Y‐series monomers, respectively. After fluorination, both exhibit bathochromic absorption denser packing modes stronger intramolecular charge transfer effect torsion‐free backbones. Through precise DYF‐V‐based devices highest performance 18.63% among GDA‐based OSCs, outperforming its non‐fluorinated counterpart, DY‐V‐based ones (16.53%). Theoretical morphological results demonstrate that proper fluorination in strengthens intra/intermolecular interactions enhanced crystallinity, superior phase segregation, less energy disorder, which is beneficial fast exciton dissociation, rapid carrier transport, suppressed recombination. The work demonstrates GDAs rigid coplanar backbones effective broader photon harvesting, packing, robust stability OSCs.

Language: Английский

Citations

2
Recent developments in polymer semiconductors with excellent electron transport performances DOI
Yunchao Zhang, Weifeng Zhang, Zhihui Chen

et al.

Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This review describes the design considerations, bonding modes between monomers, structural modification strategies, and applications of polymer semiconductors with excellent electron transport performances.

Language: Английский

Citations

2
Layered All‐Polymer Solar Cells with Efficiency of 18.34% by Employing Alloyed Polymer Donors DOI Open Access
Hang Zhou, Lu Zhang,

Hongyue Tian

et al.

Small, Journal Year: 2025, Volume and Issue: 21(11)

Published: Feb. 7, 2025

Abstract A series of layered all‐polymer solar cells (LA‐PSCs) with the normal or inverted structure are prepared by employing a sequential spin‐coating method PBQx‐TCl, PM1 as polymer donor, and PY‐DT acceptor. The power conversion efficiency (PCE) LA‐PSCs can be improved from 17.20% to 18.34% incorporating 30 wt.% into PBQx‐TCl layer, resulting simultaneously increased J SC 25.35 mA cm −2 , V OC 0.971 FF 74.49%. PCE improvement also achieved PBQx‐TCl:PM1 donor layers. mixed prefer form alloyed states in LA‐PSCs, which confirmed gradually s more content Meanwhile, photogenerated excitons layers dissociated at interface between PM1, especially for located near ITO electrode. exciton dissociation provide an additional channel improving utilization efficiency, positive external quantum spectral difference (∆EQE) values Over 6.6% realized using layer.

Language: Английский

Citations

2
Tailoring small-molecule acceptors through asymmetric side-chain substitution for efficient organic solar cells DOI Creative Commons

Lan Xie,

Dingding Qiu,

Xianghao Zeng

et al.

Science China Materials, Journal Year: 2025, Volume and Issue: 68(3), P. 860 - 867

Published: Feb. 13, 2025

Language: Английский

Citations

1
Rational Design of Two Well‐Compatible Dimeric Acceptors Through Regulating Chalcogen‐Substituted Conjugated Backbone Enable Ternary Organic Solar Cells with 19.4% Efficiency DOI

Wanying Feng,

Yuyang Bai, Jia Wang

et al.

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

Published: Nov. 12, 2024

Abstract To enhance the performance of dimeric acceptors (DMAs) based organic solar cells (OSCs), two new DMAs, designated as DC9‐HD and DYSe‐3, are rationally developed employed to fabricate ternary OSCs. The substitution sulfur atom on outer ring fused‐ring core with a selenium resultes in red‐shifted DYSe‐3. Despite these minor differences, DYSe‐3 possess nearly identical conjugated skeletons, which contribute their similar packing motifs crystallinities, ultimately enabling high degree miscibility between DMAs. Upon incorporating into host PM6:DC9‐HD binary blend, fibril‐like morphologies featured diameters ≈16.9 nm reduced charge recombination observed PM6:DC9‐HD:DYSe‐3 blend. More importantly, owing long exciton diffusion lengths low voltage losses, remarkable power conversion efficiency 19.4% is achieved for OSCs, alongside delicate balance open‐circuit short‐circuit current density. This super result comparable best oligomer acceptor OSCs reported date. Furthermore, proposed strategy, combines one polymer donor well‐compatible not only retains advantages DMAs but also offers streamlined approach fabricating high‐performance

Language: Английский

Citations

7
Dipole Moment Modulation of Terminal Groups Enables Asymmetric Acceptors Featuring Medium Bandgap for Efficient and Stable Ternary Organic Solar Cells DOI Creative Commons
Bosen Zou,

Anhai Liang,

Pengbo Ding

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 64(3)

Published: Sept. 9, 2024

Abstract This study puts forth a novel terminal group design to develop medium‐band gap Y‐series acceptors beyond conventional side‐chain engineering. We focused on the strategical integration of an electron‐donating methoxy and electron‐withdrawing halogen atom at benzene‐fused groups. combination precisely modulated dipole moment electron density groups, effectively attenuating intramolecular charge transfer effect, widening band acceptors. The incorporation these groups yielded two asymmetric acceptors, named BTP‐2FClO BTP‐2FBrO, both which exhibited open‐circuit voltage ( V oc ) as high 0.96 in binary devices, representing highest OC s among small molecule More importantly, BTP‐2FBrO exhibit modest aggregation behaviors molecular crystallinity, making them suitable third component mitigate excess PM6 : BTP‐eC9 blend optimize devices’ morphology. As result, optimized BTP‐2FClO‐based ternary organic solar cells (OSCs) achieved remarkable power conversion efficiency (PCE) 19.34 %, positioning it highest‐performing OSCs. Our highlights importance manipulating moments developing offers highly efficient for high‐performance

Language: Английский

Citations

4
Recent progress in device engineering for semitransparent organic photovoltaics DOI

Chuanfang Zhu,

Hanli Zheng, Liang Zhao

et al.

Science China Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Language: Английский

Citations

0
PM6/L8‐BO Thin Films through Layer‐by‐Layer Engineering: Formation Mechanism, Energetic Disorder, and Carrier Mobility DOI Creative Commons
Zihao Wen, Rongkun Zhou, Zilong Zheng

et al.

Aggregate, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

ABSTRACT Layer‐by‐layer (LBL) process has emerged as a promising method in the advancement of organic photovoltaics, emphasizing scalability and reproducibility. More importantly, it provides enhanced morphological control for boosting carrier mobility ( μ ) power conversion efficiency. By employing multiscale approach that combined first‐principles calculations, molecular dynamics simulations, kinetic Monte Carlo methods, relationship between LBL morphology engineering donor/acceptor (PM6/L8‐BO) thin films is elucidated. During solvent evaporation, order solid‐phase formation was top surface, bottom region, then middle region. The early solid precipitation from precursor solutions acceptor, resulting well‐ordered arrangement reducing energy disorder acceptor LUMO levels. Furthermore, difference disorders A/D blend region pure A or D domains enabled to balance electron hole mobilities, thereby mitigating charge accumulation recombination. LBL‐manufactured presented higher = 1.9 × 10 −3 cm 2 V −1 s compared bulk heterojunction (BHJ) > 0.1 ·V ). These mechanisms provided insights into strategies enhancing extraction photo‐generated carriers through engineering, driving development efficient photovoltaic materials.

Language: Английский

Citations

0
Boosting the Efficiency and Mechanical Stability of Organic Solar Cells Through a Polymer Acceptor by Reducing the Elastic Modulus DOI Creative Commons
Yan Wang, Han Yu, Dan Zhao

et al.

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

Published: Feb. 13, 2025

Abstract Organic solar cells (OSCs) are regarded as one of the most promising flexible power sources due to their lightweight and properties, with improvement photovoltaic mechanical performance. To improve current density conversion efficiency (PCE), mPh4F‐TS (TS) PYSe2F‐T (PA) introduced into binary host, PM6/mPh4F‐TT (PM6/TT) third components. It is demonstrated that corresponding ternary devices, in both rigid achieved superior efficiencies (19.6%/17.7% for PM6/TT+TS, 19.2%/17.4% PM6/TT+PA) outperform counterparts (18.3%/16.4%). However, distinct differences performance observed between polymer acceptor small‐molecular (TS). The PM6/TT+PA significantly improved stability devices a lower elastic modulus 3.6 GPa, while PM6/TT+TS resulted opposite effect higher 5.5 GPa. Through in‐depth investigation, clear correlation modulus, crack density, active layer blends successfully established, revealing key role reducing enhancing OSCs. This study provides important guidance development high robustness.

Language: Английский

Citations

0