Polymer-like tetramer acceptor enables stable and 19.75% efficiency binary organic solar cells DOI Creative Commons
Jianxiao Wang, Cheng Sun, Yonghai Li

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Feb. 20, 2025

Abstract Limited by large batch differences and inferior polymerization degree of current polymer acceptors, the potential high efficiency stability advantages all-polymer solar cells (all-PSCs) cannot be fully utilized. Alternatively, largely π-extended structurally definite oligomer acceptors are effective strategies to realize overall performance acceptors. Herein, we report a linear tetramer acceptor namely 4Y-BO with identical molecular skeleton comparable molecular-weight relative control PY-BO. The shows refined film-forming kinetics improved ordering, offering uniform crystallinity donor hence well-defined fibrous heterojunction textures. Encouragingly, PM6:4Y-BO devices achieve an up 19.75% (certified efficiency:19.58%), surpassing that PM6:PY-BO device (15.66%) ranks highest among based on More noticeably, thermal stability, photostability mechanical flexibility collectively enhanced for devices. Our study provides important approach fabricating stable organic photovoltaics.

Language: Английский

Efficient and Photostable Organic Solar Cells Achieved by Alloyed Dimer Acceptors with Tailored Linker Structures DOI Creative Commons
Jin‐Woo Lee,

Cheng Sun,

Hyesu Jeon

et al.

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

Published: June 27, 2024

Abstract High power conversion efficiency (PCE) and long‐term stability are prerequisites for commercialization of organic solar cells (OSCs). Herein, two dimer acceptors (DYTVT DYTCVT) developed with different properties through linker engineering, study their effects as alloy‐like on the photovoltaic performance photostability OSCs. These ternary OSCs effectively combine advantages both acceptors. DYTVT, characterized by its high backbone planarity, ensures elevated electron mobility glass‐transition temperature ( T g ), leading to efficient charge transport enhanced Conversely, DYTCVT, significant dipole moment electrostatic potential, enhances compatibility alloy donors refines blend morphology, facilitating generation in Consequently, D18:DYTVT:DYTCVT exhibit higher PCE (18.4%) compared D18:MYT (monomer acceptor, = 16.5%), D18:DYTVT (PCE 17.4%), D18:DYTCVT 17.0%) Furthermore, owing (133 °C) than MYT 80 DYTCVT 120 °C), have significantly t 80% lifetime 4250 h under 1‐sun illumination) 40 h) 2910 h).

Language: Английский

Citations

11
A case study of comparing two dimerized acceptor molecules built by different branch-connected and terminal-connected approaches DOI

Kangqiao Ma,

Huazhe Liang,

Yuxin Wang

et al.

Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(5), P. 1687 - 1696

Published: March 29, 2024

Language: Английский

Citations

10
Trialkylsilyl-thiophene-conjugated acceptor for efficient organic solar cells compatible with spin-coating and blade-coating technologies DOI
Tengfei Li, Qiang Wu, Ze‐Fan Yao

et al.

Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(12), P. 4184 - 4193

Published: May 21, 2024

Language: Английский

Citations

9
Fine‐Tuning Intra/Inter‐Molecular Interaction via Ternary Copolymerization Strategy to Obtain Efficient Polymer Donors DOI Open Access
Liqing Li,

Mingming Que,

Yu Fang

et al.

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

Published: Jan. 5, 2025

Incorporating a third component through ternary copolymerization strategy has proven to be promising and effective approach for further improving the device performance of polymer donors. However, terpolymer donors typically exhibit negative effects on molecular stacking weaken charge transport due irregular distribution skeleton. Herein, two terpolymers PBBQ-5 (5% ff-Qx) PBBQ-10 (10% are developed by introducing difluoro-2-(3-hexyldecyloxy) quinoxaline (ff-Qx) main chain PM6. The introduction ff-Qx unit not only enables possess N···S noncovalent intramolecular interactions that contribute enlarge planarity enhance interaction but also can fine-tuning electrostatic potential (ESP) values related polymers, thereby regulate intermolecular with acceptor force. After blending L8-BO, PBBQ-5:L8-BO-based blend film exhibits appreciated miscibility, desirable phase separation sizes, more ordered packing than analogs. Consequently, an impressive power conversion efficiency (PCE) as high 19.54% is realized in PBBQ-5-based devices, which set new record Qx-based solar cells. work emphasizes drawbacks provides pathway developing high-performance optimizing intra/inter-molecular interaction.

Language: Английский

Citations

1
Polymer-like tetramer acceptor enables stable and 19.75% efficiency binary organic solar cells DOI Creative Commons
Jianxiao Wang, Cheng Sun, Yonghai Li

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Feb. 20, 2025

Abstract Limited by large batch differences and inferior polymerization degree of current polymer acceptors, the potential high efficiency stability advantages all-polymer solar cells (all-PSCs) cannot be fully utilized. Alternatively, largely π-extended structurally definite oligomer acceptors are effective strategies to realize overall performance acceptors. Herein, we report a linear tetramer acceptor namely 4Y-BO with identical molecular skeleton comparable molecular-weight relative control PY-BO. The shows refined film-forming kinetics improved ordering, offering uniform crystallinity donor hence well-defined fibrous heterojunction textures. Encouragingly, PM6:4Y-BO devices achieve an up 19.75% (certified efficiency:19.58%), surpassing that PM6:PY-BO device (15.66%) ranks highest among based on More noticeably, thermal stability, photostability mechanical flexibility collectively enhanced for devices. Our study provides important approach fabricating stable organic photovoltaics.

Language: Английский

Citations

1