2‐Ethylhexyl‐4,6‐Dibromo‐3‐Cyano‐3‐Thieno[3,4‐b]Thiophene Enables Low HOMO Energy Level Polymer Donor DOI Open Access
Lei Wang, Yude Liu, Lihua Cao

et al.

Macromolecular Chemistry and Physics, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 8, 2024

Abstract The new halogen‐free donor polymer PCN6 is constructed using 2‐ethylhexyl‐4,6‐dibromo‐3‐cyano‐thieno[3,4‐b]thiophene as acceptor (A) block, and compared in detail with the commercially available PTB7‐Th. It found that has a wider film absorption (300–700 nm) lower highest occupied molecular orbital (HOMO) energy levels (−5.52 eV) than PTB7‐Th (−5.34 eV), suggesting great advantage of monocyano‐functionalized modification strategy terms level tuning. performance difference between PCN6:Y6‐ PTB7‐Th:Y6‐based organic solar cells (OSCs) by series studies including light intensity dependence, carrier mobility, AFM, TEM, GIWAXS. results show PCN6:Y6‐based OSCs have stronger crystallinity, better charge transport, higher more balanced less exciton complex loss. Therefore, power conversion efficiency (PCE) reaches 11.34%, while PCE only 9.02%. These suggest an excellent A block for construction polymers low HOMO levels, also demonstrate introduction cyano conjugated backbone good to achieve high‐performance OSCs.

Language: Английский

Breaking 20% Efficiency of all‐Polymer Solar Cells via Benzo[1,2‐d:4,5‐d′]Bisthiazole‐Based Terpolymer Donor Strategy for Fine Morphology Optimization DOI Open Access

Wuke Qiu,

Chentong Liao,

Yinfeng Li

et al.

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

Published: March 15, 2025

Abstract Developing high‐performance all‐polymer solar cells (all‐PSCs) remains a challenge due to the difficulty in controlling morphology of polymer blends. In this study, benzo[1,2‐d:4,5‐d′]bisthiazole (BBTz) is incorporated into PM6 main chain create series terpolymer donors, leveraging entropy increase and superior miscibility with acceptors modulate blend morphology. The introduction BBTz broadened absorption range, enhanced film crystallinity, significantly improved donor‐acceptor through its low dipole moment high electrostatic potential. This facilitated formation nanofiber structures active layer, thus optimizing As result, PBZ‐10:PY‐IT‐based device achieved an impressive power conversion efficiency (PCE) 19.06%. Incorporation PBQx‐TF binary can further improve morphology, charge transport, exciton lifetime, dissociation, collection, as well suppressed recombination, finally leading record‐breaking PCE 20.04% for all‐PSCs date. findings demonstrate effectiveness strategy enhancing all‐PSC performance. By molecular design component selection, approach provides viable pathway achieving higher supports advancement renewable energy technologies.

Language: Английский

Citations

1
Toward flexible ceramic fuel cells: Switching off brittleness in zirconia-based electrolytes DOI
Bo‐Ram Won, Hyeongwon Jeong,

Yo Han Kim

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161625 - 161625

Published: March 1, 2025

Language: Английский

Citations

0
Controlling Morphology and Improving Stability with High-Boiling-Point Additive for Efficient Organic Solar Cells DOI
Shilong Xiong, Yiwu Zhu, Yunpeng Wang

et al.

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

Published: March 17, 2025

The rapid advancement of solar photovoltaic technology underscores the growing significance organic cells (OSCs) in renewable energy solutions. A critical challenge optimizing OSC performance lies achieving precise control over active layer nanomorphology. In this study, we innovatively introduce a high-boiling-point liquid additive, 1,2,4-trichlorobenzene (1,2,4-TCB), as superior alternative to conventional additive 1,8-diiodooctane (DIO). Compared DIO, 1,2,4-TCB significantly enhances molecular ordering acceptors and improves miscibility between donor (D18) acceptor (Y6) materials, leading notable increase power conversion efficiency (PCE) from 17.56% 18.80%. It has been revealed that promotes packing, particularly for molecules grazing incidence wide-angle X-ray scattering. contact angle measurements further demonstrate improved donor–acceptor miscibility, resulting an optimized bicontinuous interpenetrating network morphology. This morphology effectively exciton separation, facilitates charge transport, minimizes recombination losses. addition improvements, 1,2,4-TCB-based devices exhibit exceptional photostability (T80 = 981 h) storage stability 2708 h), outperforming their DIO-based counterparts. These findings not only establish potential additives like boosting but also provide promising strategy advance commercial viability technology.

Language: Английский

Citations

0
Organic solar cells: beyond 20% DOI
Ruijie Ma, Zhenghui Luo,

Youdi Zhang

et al.

Science China Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Language: Английский

Citations

0
Optical and crystalline properties of benzo[1,2-b:4,5-b′]dithiophene derivatives DOI Creative Commons

Caiyun Guo,

Yibin Wang, Chenghao Zhang

et al.

RSC Advances, Journal Year: 2025, Volume and Issue: 15(20), P. 15604 - 15608

Published: Jan. 1, 2025

The methoxymethyl chain imparts BDTT with excellent optical properties, strong intermolecular interactions and tight π–π stacking, making it a potential component for the design of electron-donating organic semiconductors.

Language: Английский

Citations

0
2‐Ethylhexyl‐4,6‐Dibromo‐3‐Cyano‐3‐Thieno[3,4‐b]Thiophene Enables Low HOMO Energy Level Polymer Donor DOI Open Access
Lei Wang, Yude Liu, Lihua Cao

et al.

Macromolecular Chemistry and Physics, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 8, 2024

Abstract The new halogen‐free donor polymer PCN6 is constructed using 2‐ethylhexyl‐4,6‐dibromo‐3‐cyano‐thieno[3,4‐b]thiophene as acceptor (A) block, and compared in detail with the commercially available PTB7‐Th. It found that has a wider film absorption (300–700 nm) lower highest occupied molecular orbital (HOMO) energy levels (−5.52 eV) than PTB7‐Th (−5.34 eV), suggesting great advantage of monocyano‐functionalized modification strategy terms level tuning. performance difference between PCN6:Y6‐ PTB7‐Th:Y6‐based organic solar cells (OSCs) by series studies including light intensity dependence, carrier mobility, AFM, TEM, GIWAXS. results show PCN6:Y6‐based OSCs have stronger crystallinity, better charge transport, higher more balanced less exciton complex loss. Therefore, power conversion efficiency (PCE) reaches 11.34%, while PCE only 9.02%. These suggest an excellent A block for construction polymers low HOMO levels, also demonstrate introduction cyano conjugated backbone good to achieve high‐performance OSCs.

Language: Английский

Citations

0