Rational Regulation of Layer‐by‐Layer Processed Active Layer via Trimer‐Induced Pre‐Swelling Strategy for Efficient and Robust Thick‐Film Organic Solar Cells DOI

Shenzheng Gao,

Shanlei Xu,

Cheng Sun

et al.

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

Published: May 8, 2025

Abstract Thick‐film (>300 nm) organic solar cells (OSCs) have garnered intensifying attention due to their compatibility with commercial roll‐to‐roll printing technology for the large‐scale continuous fabrication process. However, uncontrollable donor/acceptor (D/A) arrangement in thick‐film condition, restricted exciton splitting and severe carrier traps significantly impede photovoltaic performance operability. Herein, combined layer‐by‐layer deposition technology, a twisted 3D star‐shaped trimer (BTT‐Out) is synthesized develop trimer‐induced pre‐swelling (TIP) strategy, where BTT‐Out incorporated into buried D18 donor layer enable of OSCs. The integrated approach characterizations reveal that exceptional configuration spontaneous self‐organization behavior could pre‐swell network facilitate acceptor's infiltration accelerate formation D/A interfaces. This enhancement triggers elevated polarons amplified hole‐transfer kinetics, which essential augmented efficiency. Furthermore, regulated swelling process can initiate favorable self‐assembly L8‐BO acceptors, would ameliorate transport channels mitigate traps. As result, TIP‐modified thin‐film OSC devices achieve champion 20.3% (thin‐film) 18.8% (thick‐film) upgraded stability, among one highest performances reported

Language: Английский

Kinetics Manipulation Enabled by Solubility Control Toward 19% Organic Solar Cells via Compatible Air Coating DOI Creative Commons
Yongwen Lang, Ying Zhang,

Hao Xia

et al.

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

Published: Feb. 23, 2025

Abstract Blade coating is a promising tool for upscaling organic solar cells (OSCs). However, the performances of blade‐coated OSCs still lag behind their spin‐coated counterparts, limiting competitive edge towards commercialization. One main reasons that controlling film aggregation kinetics and morphology becomes challenging during transition from spin to blade coating, especially when using high boiling point solvents, which can result in excessive aggregation. Therefore, deeper understanding appraisal formation influenced by methods crucial. In this work, it demonstrated ink solubility tuning incorporating twisted third component (BTP‐4Cl) induce rapid crystallization behavior promote fine phase separation between donor polymer (PM6) acceptor (BTP‐eC9) coating. As result, power conversion efficiency (PCE) 19.67% obtained (0.04 cm 2 ), one state‐of‐the‐art efficiencies among reported (19.76% devices). addition, found inhibited contributes enhancing light stability device. This strategy offered novel insights into effectiveness solubility‐tuning approaches achieving highly efficient stable under open‐air conditions.

Language: Английский

Citations

1
Constructing Controlled Vertical Gradient Morphology in Pseudo‐Planar Heterojunction Organic Photovoltaics via Self‐Assembled Interface Orthogonal Strategy DOI

Lin Wen,

Houdong Mao,

M.K. Ban

et al.

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

Published: April 13, 2025

Abstract Precisely regulating vertically distributed morphology by blade‐coating process is crucial to realize high‐performance large‐scale pseudo‐planar heterojunction organic photovoltaics (OPVs). However, the thermodynamic motion and random diffusion of donor/acceptor (D/A) generated from differences in surface energy concentration during sequentially will cause great challenges for obtaining ideal active layer morphology. Herein, this study have proposed a self‐assembled interface orthogonal strategy introducing low guest (N2200) form protective on PM6 surface, which counteracts erosion solution acceptor enhance continuity D/A phases, thus promoting directional carrier migration effectively suppressing energetic disorder. Finally, N2200‐modified device achieves highest power conversion efficiency (PCE) 19.86%, large‐area module (16.94 cm 2 ) exhibits exceptional PCE (16.43%). This investigation presents innovative insights into issue triggered molecular provides an effective method air‐printing OPVs with precisely controlled based non‐halogenated solvent.

Language: Английский

Citations

0
End-Group Modulation in a High Electron Mobility Y-Series Nonfullerene Acceptor Achieved Based on the DFT Method DOI Creative Commons
Zhengli Zhang, Zhao Ding, Xiang Guo

et al.

ACS Omega, Journal Year: 2025, Volume and Issue: unknown

Published: April 13, 2025

The joining of Y6 has effectively promoted the power conversion efficiency (PCE) organic solar cells, and impact its end-group modification on PCE is significant. Here, eight different groups are introduced to modify Y6, forming acceptors named V1, V2, V3, V4, V5, V6, V7, R. excited states, light absorption properties, intermolecular electron transfer discussed by density functional theory. state, average local ionization energy, Hirshfeld population, potential, affinity, mobility also calculated. Results show that V7 obtains largest red-shift in UV-visible spectra (787.55 nm). V5 have better electronic coupling while exhibiting leading (0.9577 0.4383 cm2 V-1 s-1). Acceptors with rigid skeletons, good planarity, minimal steric hindrance, locally uniform ALIE distributions potential achieve higher mobility. These results indicate precise engineering can regulate acceptors, thereby increasing PCE.

Language: Английский

Citations

0
Highly Planar Tetramer Acceptor Constructed by Vinyl Linkage Enables Organic Solar Cells with Outstanding Efficiency DOI
Fan Yu, Jiabin Liu, Wen Zhou

et al.

Chemistry of Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

Language: Английский

Citations

0
Rationalizing Star‐Shaped Nonfullerene Acceptors in Ternary Organic Solar Cells: Morphology Mediation Facilitates Exciton and Carrier Dynamics DOI
Zhiyuan Wu, Weiyi Wang, Hui Qian

et al.

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

Published: May 7, 2025

Abstract Star‐shaped trimeric acceptors have garnered increasing attention in organic solar cells (OSCs), yet a mechanistic gap exists on regulation of morphology and carrier dynamics. Herein, nonfullerene acceptor named BTF‐Trimer bearing benzotrifuran core with more electronegative oxygen atoms is newly designed, which fosters intermolecular interactions both polymer donors small‐molecule acceptors. possesses reduced aggregation tendencies high glass transition temperature, are conducive to inhibiting excessive phases stabilizing film morphology, respectively. Notably, as mediator strengthened host donor‐acceptor compatibility ternary blend active layers, forming dual‐fibril interpenetrating networks that promoted exciton dissociation hole transfer well alleviated bimolecular recombination devices. Consequently, the power conversion efficiency T 70 (the time required reach 70% initial efficiency) lifetime OSCs an Ar atmosphere achieved 19.13% ≈2800 h, This study highlights distinctive merits star‐shaped suppress over‐crystallization enhance phase continuity, offering insights into interplay phase‐separated dynamics, plays critical role

Language: Английский

Citations

0
Rational Regulation of Layer‐by‐Layer Processed Active Layer via Trimer‐Induced Pre‐Swelling Strategy for Efficient and Robust Thick‐Film Organic Solar Cells DOI

Shenzheng Gao,

Shanlei Xu,

Cheng Sun

et al.

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

Published: May 8, 2025

Abstract Thick‐film (>300 nm) organic solar cells (OSCs) have garnered intensifying attention due to their compatibility with commercial roll‐to‐roll printing technology for the large‐scale continuous fabrication process. However, uncontrollable donor/acceptor (D/A) arrangement in thick‐film condition, restricted exciton splitting and severe carrier traps significantly impede photovoltaic performance operability. Herein, combined layer‐by‐layer deposition technology, a twisted 3D star‐shaped trimer (BTT‐Out) is synthesized develop trimer‐induced pre‐swelling (TIP) strategy, where BTT‐Out incorporated into buried D18 donor layer enable of OSCs. The integrated approach characterizations reveal that exceptional configuration spontaneous self‐organization behavior could pre‐swell network facilitate acceptor's infiltration accelerate formation D/A interfaces. This enhancement triggers elevated polarons amplified hole‐transfer kinetics, which essential augmented efficiency. Furthermore, regulated swelling process can initiate favorable self‐assembly L8‐BO acceptors, would ameliorate transport channels mitigate traps. As result, TIP‐modified thin‐film OSC devices achieve champion 20.3% (thin‐film) 18.8% (thick‐film) upgraded stability, among one highest performances reported

Language: Английский

Citations

0