Enhancing the Electrostatic Potential To Develop High-Performance Polymer Donors via a Ternary Copolymerization Strategy DOI

Xintong Shi,

Jiawei Huang,

Xiaoping Wang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

Ternary copolymerization has been proven to be an effective method regulate the photovoltaic properties of polymer donors. However, terpolymers synthesized using ternary strategy inevitably disrupt periodic sequence distribution backbone, resulting in increased molecular disorder and heightened main-chain entropy. Herein, we developed two terpolymer donors by introducing electron-deficient fused-ring skeleton unit BTP with a large dipole moment into main chain PM6 via copolymerization. We found that presence enables exhibit enhanced crystallinity electrostatic potential, leading excellent miscibility more ordered packing than PM6. As result, maximum PCE 19.40% was achieved for PY5:L8-BO-based device. Overall, this work introduces novel approach developing high-performance combining third component moments restrain enhance intermolecular interaction force between acceptors.

Language: Английский

Halogenation Engineering of Solid Additives Enables 19.39% Efficiency and Stable Binary Organic Solar Cells via Manipulating Molecular Stacking and Aggregation of Both Donor and Acceptor Components DOI

Wenyan Su,

Xuming Zhou,

Qiang Wu

et al.

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

Published: Oct. 3, 2024

Abstract By selectively interacting with acceptor components, various typed solid additives achieve boosted power conversion efficiency (PCE) in organic solar cells (OSCs). However, due to the efficient active layer being composed of donor and materials, it is difficult obtain desired morphology by manipulating component alone, limiting further improvement PCEs. Herein, two a same backbone thiophene‐benzene‐thiophene (halogen‐free D1‐H) but different halogen substituents (fluorinated D1‐F chlorinated D1‐Cl) are developed probe working mechanism halogenated variation OSCs. Unlike D1‐H continuous charge distributions, D1‐Cl show isolated positive distribution benzene‐core negative thiophene, offering stronger non‐covalent interactions both (PM6) (L8‐BO), especially D1‐Cl. Consequently, D1‐Cl‐treated obtains an optimized phase separation improved molecular packing, boosting PCE 18.59% device stability OSCs, 17.62% for D1‐H‐treated counterparts. Moreover, using D18:L8‐BO D18:BTP‐eC9 as layers, binary OSCs impressive PCEs 19.29% 19.39%, respectively. This work indicates that halogenation engineering can effectively regulate improving elucidates underlying mechanism.

Language: Английский

Citations

10
Over 18% Efficiency from Halogen‐Free Solvent‐Processed Polymer Solar Cells Enabled by Asymmetric Small Molecule Acceptors with Fluoro‐Thienyl Extended Terminal DOI Creative Commons
Jingnan Wu,

Fengbo Sun,

Xinxin Xia

et al.

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

Published: Jan. 19, 2025

Abstract The potential impact of end‐group (EG) in non‐fullerene acceptor (NFA) on enabling green solvent‐processable polymer solar cells (PSCs) remains underexplored, offering opportunities for advancements environmentally friendly PSC development. Herein, the EG 1′,1′‐dicyanomethylene‐4‐fluoro‐5‐thienyl‐3‐indanone (IC‐FT) is developed by modifying state‐of‐the‐art Y6 derivative NFA, BTP‐4F, resulting two novel NFAs, namely BTP‐FT and BTP‐2FT. Distinctively, this study reveals that it noncovalent F···S interaction, other than commonly believed strong hydrogen bonding F···H plays a key role determining final molecular conformation, as confirmed means 2D NMR Gibbs free energy calculations. asymmetric possesses an upshifted lowest unoccupied orbital level enhances solubility toluene. Consequently, can mitigate phase separation, promote formation nanofibrillar morphology, facilitate exciton dissociation, ultimately enhance performance PSCs, achieving high open circuit voltage 0.900 V power conversion efficiency (PCE) 17.56%. Furthermore, ternary blend PM6:BTP‐FT:BTP‐4F achieves PCE 18.39% devices processed from This offers perspective NFA design high‐efficiency eco‐friendly processable PSCs enriching array electron‐withdrawing EGs molecules.

Language: Английский

Citations

1
A systematic investigation on pyridine derived solid additives inducing fibrillar morphology for highly efficient organic solar cells with over 20 % efficiency DOI Creative Commons
Kai Chen,

Weixu Duan,

Lang Zhou

et al.

Materials Science and Engineering R Reports, Journal Year: 2025, Volume and Issue: 164, P. 100977 - 100977

Published: March 18, 2025

Language: Английский

Citations

1
Thickness Insensitive Organic Solar Cells with High Figure‐of‐Merit‐X Enabled by Simultaneous D/A Interpenetration and Stratification DOI Creative Commons

Xiyun Xie,

Ruijie Ma, Yongmin Luo

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(35)

Published: June 14, 2024

Abstract Low cost and printing friendly fabrication of organic solar cells (OSCs) require thick‐film devices with simply structured photoactive molecules. Thus, achieving high power conversion efficiency (PCE) for non‐fused ring acceptor‐based thickness is great significance. Herein, by transforming traditional blend casting method to emerging sequential deposition (SD) method, D18:A4T‐16 active exhibits large improvement from 8.02% 14.75% in 300 nm thick devices. Systematic morphological photophysical characterizations showcase the effectiveness SD processing sufficient donor/acceptor interpenetration vertical stratification, which eliminates dilemma charge generation/transport films. Meanwhile, D18 bottom layer proven helpful realizing fast evaporation postdeposited poor solvent, resulting naturally thickened well‐regulated crystallization. Furthermore, a new index emphasize based on nonfused acceptors, called figure‐of‐merit‐X (FoM‐X), has been defined. The processed herein, nm, 500 800 thicknesses possess leading FoM‐X values.

Language: Английский

Citations

7
N-type small molecule electrolyte cathode interface layer with thickness insensitivity for organic solar cells DOI
Dan Zhou, Yanyan Wang, Yubing Li

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: 128, P. 109890 - 109890

Published: June 14, 2024

Language: Английский

Citations

7
Highly efficient and stable organic solar cells achieved by improving exciton diffusion and splitting through a volatile additive-assisted ternary strategy DOI
Chaoyue Zhao, Yufei Wang,

Kangbo Sun

et al.

Materials Science and Engineering R Reports, Journal Year: 2024, Volume and Issue: 160, P. 100828 - 100828

Published: July 21, 2024

Language: Английский

Citations

6
Highly electronegative additives suppress energetic disorder to realize 19.19 % efficiency binary organic solar cells DOI

Luye Cao,

Hengyuan Zhang,

Xiaoyang Du

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: 129, P. 110016 - 110016

Published: July 17, 2024

Language: Английский

Citations

5
Device Performance of Emerging Photovoltaic Materials (Version 5) DOI Creative Commons
Osbel Almora, Guillermo C. Bazan, Carlos I. Cabrera

et al.

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

Published: Nov. 26, 2024

Abstract This 5th annual “ Emerging PV Report” highlights the latest advancements in performance of emerging photovoltaic (e‐PV) devices across various e‐PV research areas, as documented peer‐reviewed articles published since August 2023. Updated graphs, tables, and analyses are provided, showcasing several key parameters, including power conversion efficiency, open‐circuit voltage, short‐circuit current, fill factor, light utilization stability test energy yield. These parameters presented functions bandgap average visible transmittance for each technology application contextualized using benchmarks such detailed balance efficiency limit.

Language: Английский

Citations

5
Effects of Alkyl Spacer Length in Carbazole‐Based Self‐Assembled Monolayer Materials on Molecular Conformation and Organic Solar Cell Performance DOI Creative Commons
Qiaonan Chen, Kangbo Sun, Leandro R. Franco

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

Abstract Carbazole‐based self‐assembled monolayer (SAM) materials as hole transport layers (HTL) have led organic solar cells (OSCs) to state‐of‐the‐art photovoltaic performance. Nonetheless, the impact of alkyl spacer length SAMs remains inadequately understood. To improve knowledge, four dichloride‐substituted carbazole‐based (from 2Cl‐2PACz 2Cl‐5PACz) with lengths 2–5 carbon atoms is developed. Single crystal analyses reveal that shorter spacers exhibit stronger intermolecular interactions and denser packing. The molecular conformation significantly impacts their footprint coverage on ITO. These factors result in highest lowest for 2Cl‐3PACz OSCs based PM6:L8‐BO HTL achieved high efficiencies 18.95% 18.62% without methanol rinsing ITO/SAMs anodes, corresponding multilayer structures, respectively. In contrast, utilizing other showed decreased increased. superior performance can be attributed its spacer, which reduces series resistance, tunneling distance, barrier. This work provides valuable insights into design high‐performance OSCs.

Language: Английский

Citations

4
Self-doped alcohol-soluble small molecules as cathode interface layers for organic solar cells DOI

Yifeng Lei,

Tingting Shang, Yefeng Qiu

et al.

Progress in Organic Coatings, Journal Year: 2025, Volume and Issue: 200, P. 109060 - 109060

Published: Jan. 16, 2025

Language: Английский

Citations

0