Rationalizing Star‐Shaped Nonfullerene Acceptors in Ternary Organic Solar Cells: Morphology Mediation Facilitates Exciton and Carrier Dynamics DOI
Zhiyuan Wu, Weiyi Wang, Hui Qian

et al.

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

Published: May 7, 2025

Abstract Star‐shaped trimeric acceptors have garnered increasing attention in organic solar cells (OSCs), yet a mechanistic gap exists on regulation of morphology and carrier dynamics. Herein, nonfullerene acceptor named BTF‐Trimer bearing benzotrifuran core with more electronegative oxygen atoms is newly designed, which fosters intermolecular interactions both polymer donors small‐molecule acceptors. possesses reduced aggregation tendencies high glass transition temperature, are conducive to inhibiting excessive phases stabilizing film morphology, respectively. Notably, as mediator strengthened host donor‐acceptor compatibility ternary blend active layers, forming dual‐fibril interpenetrating networks that promoted exciton dissociation hole transfer well alleviated bimolecular recombination devices. Consequently, the power conversion efficiency T 70 (the time required reach 70% initial efficiency) lifetime OSCs an Ar atmosphere achieved 19.13% ≈2800 h, This study highlights distinctive merits star‐shaped suppress over‐crystallization enhance phase continuity, offering insights into interplay phase‐separated dynamics, plays critical role

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

1
Asymmetrically Substituted Quinoxaline Enabling Conformation-Locked Polymer Donors toward High-Performance Polymer Solar Cells DOI
Hongru Chen,

Jiongjiong Zhang,

Qingyuan Wang

et al.

Chemistry of Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Polymer donors are a key component for high-performance polymer solar cells (PSCs), and the emergence of giant acceptors presents challenge in designing accessible that improve miscibility device performance. In this study, we developed series quinoxaline (Qx)-based polymers by introducing monosubstituted conjugated side chains employing noncovalent conformational locks to maintain backbone rigidity. This approach minimizes steric hindrance enhances molecular rigidity while simplifying synthesis, potentially reducing cost Qx-based materials. Among these polymers, F atom-substituted PF-2F demonstrated superior planarity due CH···F hydrogen bonds, thereby improving crystallinity with tethered dimeric (DY2). As result, binary PSC based on achieved PCE 17.5%, which increased 18.3% after addition additional donor D18 construct ternary PSCs. work highlights how asymmetric modulate photovoltaic properties, providing new insights rational design materials complement acceptors.

Language: Английский

Citations

0
3D-Architected Acceptor Affords Efficient, Stable and Stretchable Photovoltaics DOI Creative Commons
Jin‐Woo Lee, Jung‐Yong Lee, Bumjoon J. Kim

et al.

National Science Review, Journal Year: 2025, Volume and Issue: 12(4)

Published: Feb. 22, 2025

Language: Английский

Citations

0
Rational halogenation on aromatic-core of tethered small molecule acceptors for high-performance polymer solar cells DOI
Yang Bai, Qi Chen, Qingyuan Wang

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162657 - 162657

Published: April 1, 2025

Language: Английский

Citations

0
Conjugated Side‐Chains Optimize Giant Acceptor Compatibility with Low‐Cost Polymer Donor to Overcome the Cost‐Efficiency‐Stability Trilemma in Polymer Solar Cells DOI
Qi Chen, Qingyuan Wang,

Shixin Meng

et al.

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

Published: May 7, 2025

Abstract Polymer solar cells (PSCs) rely on blends of small‐molecule acceptors (SMAs) and polymer donors, but the thermodynamic relaxation SMAs requires an oligomeric approach to enhance operational stability. However, high‐efficiency devices often depend expensive synthesis costly posing a significant barrier achieving sustainable renewable energy. Here, challenge is addressed through thermodynamically derived compatibility giant with low‐cost donor PTQ10. This achieved by strategically employing conjugated side chains modulate dimerize acceptors, thereby precisely tuning their properties optimize compatibility. Our synthetic route avoids toxic reagents, halogenated solvents, harsh conditions. The dimer (DYBT) incorporating n ‐type linker enhances crystallinity, absorption, intramolecular superexchange coupling compared its p counterpart, achieves device efficiency 19.53%. Considering efficiency, stability, material cost, potential cost per kilowatt for PTQ10:DYBT 0.10 $ kW −1 , while most systems exceed 10 . These findings offer valuable insights cost‐effective well pair donors reduce overall photo‐active layer durable

Language: Английский

Citations

0
Rationalizing Star‐Shaped Nonfullerene Acceptors in Ternary Organic Solar Cells: Morphology Mediation Facilitates Exciton and Carrier Dynamics DOI
Zhiyuan Wu, Weiyi Wang, Hui Qian

et al.

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

Published: May 7, 2025

Abstract Star‐shaped trimeric acceptors have garnered increasing attention in organic solar cells (OSCs), yet a mechanistic gap exists on regulation of morphology and carrier dynamics. Herein, nonfullerene acceptor named BTF‐Trimer bearing benzotrifuran core with more electronegative oxygen atoms is newly designed, which fosters intermolecular interactions both polymer donors small‐molecule acceptors. possesses reduced aggregation tendencies high glass transition temperature, are conducive to inhibiting excessive phases stabilizing film morphology, respectively. Notably, as mediator strengthened host donor‐acceptor compatibility ternary blend active layers, forming dual‐fibril interpenetrating networks that promoted exciton dissociation hole transfer well alleviated bimolecular recombination devices. Consequently, the power conversion efficiency T 70 (the time required reach 70% initial efficiency) lifetime OSCs an Ar atmosphere achieved 19.13% ≈2800 h, This study highlights distinctive merits star‐shaped suppress over‐crystallization enhance phase continuity, offering insights into interplay phase‐separated dynamics, plays critical role

Language: Английский

Citations

0