Regulating Intermolecular Interactions and Film Formation Kinetics for Record Efficiency in Difluorobenzothiadizole‐based Organic Solar Cells DOI
Zhibo Wang,

Shenbo Zhu,

Xiaoxiao Peng

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 137(1)

Published: Sept. 12, 2024

Abstract The difluorobenzothiadizole (ffBT) unit is one of the most classic electron‐accepting building blocks used to construct D‐A copolymers for applications in organic solar cells (OSCs). Historically, ffBT‐based polymers have achieved record power conversion efficiencies (PCEs) fullerene‐based OSCs owing their strong temperature‐dependent aggregation (TDA) characteristics. However, excessive miscibility and rapid kinetics during film formation hindered performance with state‐of‐the‐art non‐fullerene acceptors (NFAs). Herein, we synthesized two copolymers, PffBT‐2T PffBT‐4T, incorporating different π‐bridges modulate intermolecular interactions tendencies. Experimental theoretical studies revealed that PffBT‐4T exhibits reduced electrostatic potential differences L8‐BO compared PffBT‐2T. This facilitates improved phase separation active layer, leading enhanced molecular packing optimized morphology. Moreover, demonstrated a prolonged nucleation crystal growth process, Consequently, PffBT‐4T‐based devices remarkable PCE 17.5 %, setting new photovoltaic polymers. Our findings underscore importance conjugate backbone modulation controlling behavior kinetics, providing valuable insights design high‐performance polymer donors photovoltaics.

Language: Английский

End-cap modeling on the thienyl-substituted benzodithiophene trimer-based donor molecule for achieving higher photovoltaic performance DOI

Muhammad Hamza Maqsood,

Rasheed Ahmad Khera, Rana Farhat Mehmood

et al.

Journal of Molecular Graphics and Modelling, Journal Year: 2023, Volume and Issue: 124, P. 108550 - 108550

Published: June 13, 2023

Language: Английский

Citations

27
Regulating Intermolecular Interactions and Film Formation Kinetics for Record Efficiency in Difluorobenzothiadizole‐based Organic Solar Cells DOI
Zhibo Wang,

Shenbo Zhu,

Xiaoxiao Peng

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 64(1)

Published: Sept. 12, 2024

The difluorobenzothiadizole (ffBT) unit is one of the most classic electron-accepting building blocks used to construct D-A copolymers for applications in organic solar cells (OSCs). Historically, ffBT-based polymers have achieved record power conversion efficiencies (PCEs) fullerene-based OSCs owing their strong temperature-dependent aggregation (TDA) characteristics. However, excessive miscibility and rapid kinetics during film formation hindered performance with state-of-the-art non-fullerene acceptors (NFAs). Herein, we synthesized two copolymers, PffBT-2T PffBT-4T, incorporating different π-bridges modulate intermolecular interactions tendencies. Experimental theoretical studies revealed that PffBT-4T exhibits reduced electrostatic potential differences L8-BO compared PffBT-2T. This facilitates improved phase separation active layer, leading enhanced molecular packing optimized morphology. Moreover, demonstrated a prolonged nucleation crystal growth process, Consequently, PffBT-4T-based devices remarkable PCE 17.5 %, setting new photovoltaic polymers. Our findings underscore importance conjugate backbone modulation controlling behavior kinetics, providing valuable insights design high-performance polymer donors photovoltaics.

Language: Английский

Citations

5
Concentration effect on the chain structure and photoelectric properties of conjugated polymer precursor solutions and thin films: A mini review DOI Open Access
Yuhua Zhang,

Dongyang Cheng,

Tao Li

et al.

Journal of Polymer Science, Journal Year: 2023, Volume and Issue: 62(6), P. 1156 - 1174

Published: Dec. 10, 2023

Abstract Conjugated polymers have attracted extensive attention in numerous research fields because of their exceptional photoelectric properties and distinctive solution processing capabilities. The conformation the chain structure condensed state are closely related to various factors, such as concentration solvent. Concentration, a significant external parameter, plays crucial role self‐assembly formation crystalline structures conjugated polymers. It also affects solution, membrane, performance fabricated devices. Recently, there been an increasing number studies conducted from perspective concentration. Therefore, it is important comprehensively summarize effect on transition process film, well impact In this review, we effects motion, particle size, ordered structure, solutions thin films, device efficiency. This provides unique fundamental characteristics polymers, which can assist development improvement optoelectronic

Language: Английский

Citations

5
Fluorinated Polymer Donors for Nonfullerene Organic Solar Cells DOI

Dongyan Li,

Huijuan Wang, Jin‐Ming Chen

et al.

Chemistry - A European Journal, Journal Year: 2023, Volume and Issue: 30(12)

Published: Nov. 29, 2023

Abstract The rapid development of narrow‐bandgap nonfullerene acceptors (NFAs) has boosted the efficiency organic solar cells (OSCs) over 19 %. new features high‐performance NFAs, such as visible‐NIR light absorption, moderate highest occupied molecular orbitals (HOMO), and high crystallinity, require polymer donors with matching physical properties. This emphasizes importance methods that can effectively tune properties polymers. Owning to very small atom size strongest electronegativity, fluorination been proved most efficient strategy regulate donors, including frontier energy level, absorption coefficient, dielectric constant, crystallinity charge transport. Owing success strategy, vast majority possess one or more fluorine atoms. In this review, synthetic methods, route well‐known fluorinated building blocks, polymers which are categorized by type donor acceptor units, relationships between structures, properties, photovoltaic performances comprehensively surveyed. We hope review could provide readers a deeper insight into lay strong foundation for future innovation

Language: Английский

Citations

4
Fluorinated Benzothiadiazole-Based Polymers for Organic Solar Cells: Progress and Prospects DOI Creative Commons
Zhibo Wang,

Shenbo Zhu,

Tongzi Li

et al.

ACS Materials Au, Journal Year: 2024, Volume and Issue: 5(1), P. 57 - 71

Published: Nov. 8, 2024

The integration of fluorinated benzothiadiazole (FBT) into donor–acceptor (D–A) copolymers represents a major advancement in the field organic solar cells (OSCs). fluorination process effectively fine-tunes energy levels, reduces highest occupied molecular orbital and enhances open-circuit voltages polymers. Furthermore, improves packing crystallinity, which significantly boosts charge transport overall device performance. This review provides detailed analysis progress made with FBT-based polymers OSCs, classifying these materials according to their copolymerization units. It discusses design strategies structure–property relationships that have emerged as well current challenges future directions for optimizing By offering comprehensive overview existing research, this aims facilitate development high-performance photovoltaic materials, ultimately contributing sustainable solutions.

Language: Английский

Citations

1
High-performance nonfullerene polymer solar cells based on chlorinated quinoxaline copolymer with a high short-circuit current density DOI

Zhongxin Zhou,

Yongchuan Xu,

Jun Yang

et al.

Organic Electronics, Journal Year: 2024, Volume and Issue: 127, P. 107004 - 107004

Published: Feb. 16, 2024

Language: Английский

Citations

1
Positional effects of alkyl chains on the photovoltaic performances of quinoxaline-based polymers DOI
Dinda Fariesta Nugraha, Yifan Yu, Jung Won Yoon

et al.

Journal of Materials Chemistry C, Journal Year: 2023, Volume and Issue: 11(40), P. 14009 - 14017

Published: Jan. 1, 2023

The position of the alkyl chains was carefully adjusted to improve photovoltaic characteristics D–A-type quinoxaline-based polymers.

Language: Английский

Citations

3
Tailoring the mechanical properties of benzothiadiazole-based semiconducting polymers through chalcogen atom substitution DOI

Piumi Kulatunga,

Marc Comí, Tiago Carneiro Gomes

et al.

Journal of Materials Chemistry C, Journal Year: 2023, Volume and Issue: 11(42), P. 14661 - 14670

Published: Jan. 1, 2023

The electrical, thermal, and mechanical properties of a series benzothiadiazole (BT)-based conjugated polymers with different chalcogen atoms were investigated.

Language: Английский

Citations

3
Regulating Intermolecular Interactions and Film Formation Kinetics for Record Efficiency in Difluorobenzothiadizole‐based Organic Solar Cells DOI
Zhibo Wang,

Shenbo Zhu,

Xiaoxiao Peng

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 137(1)

Published: Sept. 12, 2024

Abstract The difluorobenzothiadizole (ffBT) unit is one of the most classic electron‐accepting building blocks used to construct D‐A copolymers for applications in organic solar cells (OSCs). Historically, ffBT‐based polymers have achieved record power conversion efficiencies (PCEs) fullerene‐based OSCs owing their strong temperature‐dependent aggregation (TDA) characteristics. However, excessive miscibility and rapid kinetics during film formation hindered performance with state‐of‐the‐art non‐fullerene acceptors (NFAs). Herein, we synthesized two copolymers, PffBT‐2T PffBT‐4T, incorporating different π‐bridges modulate intermolecular interactions tendencies. Experimental theoretical studies revealed that PffBT‐4T exhibits reduced electrostatic potential differences L8‐BO compared PffBT‐2T. This facilitates improved phase separation active layer, leading enhanced molecular packing optimized morphology. Moreover, demonstrated a prolonged nucleation crystal growth process, Consequently, PffBT‐4T‐based devices remarkable PCE 17.5 %, setting new photovoltaic polymers. Our findings underscore importance conjugate backbone modulation controlling behavior kinetics, providing valuable insights design high‐performance polymer donors photovoltaics.

Language: Английский

Citations

0