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

Shenbo Zhu,

Tongzi Li

и другие.

ACS Materials Au, Год журнала: 2024, Номер 5(1), С. 57 - 71

Опубликована: Ноя. 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.

Язык: Английский

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

Shenbo Zhu,

Xiaoxiao Peng

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 64(1)

Опубликована: Сен. 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.

Язык: Английский

Процитировано

5

Spacer Twisting Strategy to Realize Ultrabright Near-Infrared II Polymer Nanoparticles for Fluorescence Imaging-Guided Tumor Phototheranostics DOI
Yifan Wu, Han Yu,

Chunbin Li

и другие.

ACS Nano, Год журнала: 2024, Номер 18(41), С. 28178 - 28188

Опубликована: Окт. 3, 2024

Conjugated polymers are becoming popular near-infrared II (NIR-II) phototheranostic agents (PTAs) due to their numerous advantages, such as high photostability, large molar extinction coefficients, and excellent photothermal properties. However, the strong π-π interactions between chains of conjugated resulted in generally low NIR-II emission quantum yields (QY). Therefore, synthesis with QY is an interesting but challenging task. Herein, we proposed a spacer twisting strategy realize ultrabright polymer nanoparticles for fluorescence imaging-guided tumor phototheranostics. Theoretical calculations indicated that PY-IT has largest dihedral angle largely π-conjugated skeleton spacer, which can effectively inhibit intermolecular stacking, resulting improved 16.5% nanoparticles. In addition, NPs perform imaging treatment tumors. The work presents some valuable guides achieving polymeric PTAs QY.

Язык: Английский

Процитировано

5

Electron-deficient fused dithieno-benzothiadiazole-bridged polymer acceptors for high-efficiency all-polymer solar cells with low energy loss DOI

Hairui Bai,

Heng Zhang,

Huifeng Meng

и другие.

Materials Science and Engineering R Reports, Год журнала: 2024, Номер 163, С. 100916 - 100916

Опубликована: Дек. 16, 2024

Язык: Английский

Процитировано

3

Shamrock-shaped Nonfullerene Acceptors Containing Nonhalogenated End Groups for High-Voltage Organic Photovoltaics DOI

Fuli Xie,

Xiangyu Li, Zongtao Wang

и другие.

Dyes and Pigments, Год журнала: 2025, Номер 235, С. 112616 - 112616

Опубликована: Янв. 2, 2025

Язык: Английский

Процитировано

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

и другие.

Aggregate, Год журнала: 2025, Номер unknown

Опубликована: Янв. 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.

Язык: Английский

Процитировано

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

и другие.

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 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.

Язык: Английский

Процитировано

0

Strategies and Mechanisms To Minimize Energy Loss in Non-Fullerene Bulk Heterojunction Organic Solar Cells: Experimental and Computational Approaches DOI
Hemraj Dahiya, Rakesh Suthar, Supravat Karak

и другие.

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Март 6, 2025

Язык: Английский

Процитировано

0

Synthesis of Anthracene‐Based Conjugated Polymers With Alkoxyl Side Chains Architecture for Potential Photovoltaic Application DOI Open Access
Louiza Boudiba, Alfred Ngenge Tamfu, Shahidul Alam

и другие.

Journal of Applied Polymer Science, Год журнала: 2025, Номер unknown

Опубликована: Март 25, 2025

ABSTRACT Insufficiency of energy resources affects the economy and constitutes a global crisis. Solar represents an immense renewable source, various photovoltaic cells, such as polymer solar are being developed to tap make it available for consumption. This work describes synthesized anthracene‐conjugated polymers with alkoxyl side‐chain distributions via Horner–Wadsworth–Emmons polyolefination reactions. Nuclear magnetic resonance (NMR), size exclusion chromatography (SEC), x‐ray diffraction (XRD) were used characterize polymers. Electrochemical optical bandgaps determined by cyclic voltammetry (CV), while absorption measurements performances studied using different optoelectrical characterizations. The side chains impacted power conversion efficiency (PCE), open‐circuit voltage ( V OC ), short‐circuit current density J SC fill factor (FF) optoelectronic since they can reduce electron deficiency end group moiety, leading larger bandgap. properties suggested considerable improvement elaborated cells' performance based on overcasts, specifically methanol l ‐arginine dissolved in methanol. newly exhibit optimizable promising characteristics.

Язык: Английский

Процитировано

0

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

и другие.

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162657 - 162657

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0

Central π-conjugated extension in quinoxaline-based small-molecule acceptors as guest components enabling high-performance ternary organic solar cells DOI Creative Commons
Chung Hang Kwok,

Ho Ming Ng,

Chuanlin Gao

и другие.

Journal of Materials Chemistry A, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Ternary strategies have critical roles in pursuing high efficiencies for organic solar cells (OSCs).

Язык: Английский

Процитировано

0