Achieving Finely Optimized Morphology and Highly Efficient Layer-by-Layer Organic Solar Cells via Fluorinated Quinoxaline-Based Polymer Additives DOI
Yujie Wu,

Xingjian Dai,

Chentong Liao

et al.

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

Published: April 7, 2025

Vertical phase-separated active layer morphology is essential for organic solar cells (OSCs), which can be effectively achieved through layer-by-layer (LbL) processing, enabling independent optimization of donor and acceptor layers. Here, we present a novel strategy to optimize the D18/L8-BO-based OSCs by incorporating polyfluoroquinoxaline-type polymer additives. Three quinoxaline-based polymers with varying fluorination contents, namely, P2FQx, P3FQx, P4FQx, were synthesized evaluated. Although these showed limited performance as standalone materials in bulk heterojunction (BHJ) devices, their use additives LbL-OSCs significantly enhanced device efficiency. These promoted D18 aggregation, L8-BO penetration, facilitated formation vertically interpenetrating donor/acceptor network. Among additives, P2FQx demonstrated best performance, an optimized achieving champion power conversion efficiency (PCE) 20.13% well high fill factor (FF) 80.13%. Our results highlight potential rationally designed address morphology-related challenges provide pathway further development high-performance scalable photovoltaic devices.

Language: Английский

Over 19.2% Efficiency of Layer‐By‐Layer Organic Photovoltaics by Ameliorating Exciton Dissociation and Charge Transport DOI Open Access

Hongyue Tian,

Hang Zhou, Lu Zhang

et al.

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

Published: Jan. 26, 2025

Abstract Layer‐by‐layer (LbL) organic photovoltaics (OPVs) are fabricated with polymer PM1 as donor and small molecule L8‐BO acceptor by employing sequential spin‐coating technology. The BTP‐eC9 PTAA deliberately selected for individually incorporating into layer layer, resulting in the power conversion efficiency (PCE) increased from 18.22% to 19.23%. improvement of performance is attributed synergistically short circuit current density ( J SC ) 27.78 mA cm −2 fill factor (FF) 78.23%. introduction can promote photogenerated exciton dissociation, especially excitons near anode. Meanwhile, molecular crystallinity also enhanced appropriate layer. incorporation provide hole transport channels effectively improve holes generated self‐dissociation L8‐BO, FFs 77.40% synergistic effects layers result a 19.23% PCE optimized LbL‐OPVs. This work demonstrates that there great room hierarchically optimize achieving highly efficient

Language: Английский

Citations

3
Pressure‐Controlled Nanoimprint Lithography Achieves over 20% Efficiency in Organic Solar Cells DOI Open Access
Yinfeng Li, Hongjia Li, Xiaopeng Xu

et al.

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

Published: Feb. 9, 2025

Abstract Nanoimprint lithography (NIL) offers unprecedented control over active layer morphology in organic solar cells (OSCs), yet optimal processing conditions remain critical for maximizing device performance. Here, pressure‐dependent NIL fabrication of ordered interdigitated heterojunction structures is demonstrated D18/L8‐BO‐based OSCs, achieving exceptional performance through systematic pressure optimization. At an 50 bar, devices exhibit record‐setting metrics: 20.08% power conversion efficiency, 27.34 mA cm −2 short‐circuit current density, and 80.34% fill factor. The NIL‐patterned layers form well‐defined, solvent‐resistant nanopillar arrays (8.7–29 nm height) with enhanced light‐harvesting capabilities. Detailed characterization reveals improved molecular ordering both donor acceptor phases, while advanced spectroscopy demonstrates accelerated charge transfer dynamics reduced exciton dissociation diffusion times. This pressure‐optimized strategy simultaneously enhances the optical, morphological, electronic properties establishing a promising pathway toward commercial‐scale photovoltaic technology.

Language: Английский

Citations

3
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
An n‐Doped Organic Cross‐Linked Electron Transport Layer with High Electrical Conductivity for High‐Efficiency Tandem Organic Photovoltaics DOI Open Access
Yan Xu, Yifan Liao, Wenxuan Wang

et al.

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

Published: March 24, 2025

Abstract With merits of good solution processability, intrinsic flexibility, etc, organic/organic interconnecting layers (ICLs) are highly desirable for tandem organic photovoltaics (OPVs). Herein, an n‐doped cross‐linked electron transport layer (ETL), named c‐NDI‐Br:PEI is developed, via a simple in situ quaternization reaction between bromopentyl‐substituted naphthalene diimide derivative (NDI‐Br) and polyethylenimine (PEI). Due to strong self‐doping, films exhibit high electrical conductivity (0.06 S cm −1 ), which important efficient hole reombination ICL OPVs. In addition, the ETLs show work function modulation ability, solvent‐resistance. The above features enable as ETL not only single‐junction OPVs, but also devices without any metal ICL. Under solar radiation, device with achieves power conversion efficiency (PCE) 18.18%, surpassing ZnO‐based (17.09%). homo‐ hetero‐tandem m‐PEDOT:PSS:c‐NDI‐Br:PEI remarkable PCEs 19.06% 20.06%, respectively. 808 nm laser radiation photon flux 57 mW −2 , homo‐tandem presents superior PCE 38.5%. This study provides new constructing all‐solution‐processed ICL, can be integrated flexible wearable devices.

Language: Английский

Citations

0
Evolution and Development Trend of Vertical Phase Separation of Active Layer Construction Technology for Organic Solar Cells DOI Creative Commons
Yanan Wei, Hui Huang

JOURNAL OF ENGINEERING STUDIES, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

Citations

0
Achieving 19.3%-efficiency binary organic solar cells via synergistically dual-phases morphology control DOI

Yushou Zhao,

Wenming Li, F. Xiao‐Feng Qin

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 506, P. 160133 - 160133

Published: Jan. 1, 2025

Language: Английский

Citations

0
200 nm Ultrathin Freestanding Organic Photovoltaics DOI Creative Commons

Jingyu Chang,

Zida Zheng,

Qianqing Jiang

et al.

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

Published: March 31, 2025

Ultrathin organic photovoltaics (OPVs) have great application prospects in the field of wearable electronics, such as electronic tattoos, skins, etc. In this study, we report substrate-free ultrathin OPVs with a thickness approximately 200 nm. The freestanding OPV devices achieve power conversion efficiency 11.6% and power-per-weight ratio 109.4 W g–1, weight 1.06 g m–2. can self-adhere to various surfaces complex curved structures, ensuring excellent conformity. Notably, demonstrate remarkable mechanical flexibility, maintaining 90% their initial after 1000 compression-stretching cycles are capable bending radius less than 2 μm. These attributes make crucial advancement expanding landscape for electronics other special applications ultraflexible ultralight requests.

Language: Английский

Citations

0
Achieving Finely Optimized Morphology and Highly Efficient Layer-by-Layer Organic Solar Cells via Fluorinated Quinoxaline-Based Polymer Additives DOI
Yujie Wu,

Xingjian Dai,

Chentong Liao

et al.

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

Published: April 7, 2025

Vertical phase-separated active layer morphology is essential for organic solar cells (OSCs), which can be effectively achieved through layer-by-layer (LbL) processing, enabling independent optimization of donor and acceptor layers. Here, we present a novel strategy to optimize the D18/L8-BO-based OSCs by incorporating polyfluoroquinoxaline-type polymer additives. Three quinoxaline-based polymers with varying fluorination contents, namely, P2FQx, P3FQx, P4FQx, were synthesized evaluated. Although these showed limited performance as standalone materials in bulk heterojunction (BHJ) devices, their use additives LbL-OSCs significantly enhanced device efficiency. These promoted D18 aggregation, L8-BO penetration, facilitated formation vertically interpenetrating donor/acceptor network. Among additives, P2FQx demonstrated best performance, an optimized achieving champion power conversion efficiency (PCE) 20.13% well high fill factor (FF) 80.13%. Our results highlight potential rationally designed address morphology-related challenges provide pathway further development high-performance scalable photovoltaic devices.

Language: Английский

Citations

0