Collaborative Morphological and Electrical Regulation of High-Mobility Conjugated Polymers via a Multifunctional Polymeric Additive DOI
Chenhui Xu, Chuanbin An, Mengyuan Gao

et al.

Macromolecules, Journal Year: 2024, Volume and Issue: 57(22), P. 10792 - 10801

Published: Nov. 8, 2024

Morphological and electrical control over conjugated polymers has a great potential for the fabrication of high-performance organic thin-film transistors (OTFTs). Herein, we employed multifunctional polymeric additive, namely, PBTTT-b-HTPB, to optimize molecular packing order an isoindigo-based model polymer (IIDSiC8) simultaneously regulate minority carriers boosted transport properties in OTFTs via facile solution processing. By detailed comparative study, demonstrated that PBTTT-b-HTPB remarkably improved crystallinity IIDSiC8 by forming elongated fibers with higher thin film, which originated from larger size ordered aggregates due presence insulating block. On other hand, p-type block PBTTT worked as hole trapping center, resulting significantly increased electron density, reduced off-current, optimal n-type performance. Benefiting collaborative morphological regulation, IIDSiC8/PBTTT-b-HTPB films displayed well-aligned morphology high mobility up close 7 cm2 V–1 s–1 together on/off ratio 106 bar-coated OTFTs. The is among top performance values reported polymers. Our work achieved simultaneous optimization film microstructures carrier characteristics semiconductors, providing opportunities production OTFT devices superior

Language: Английский

Cascaded Energy and Charge Transfer Synergistically Prompting 18.7% Efficiency of Layered Organic Solar Cells with 1.48 eV Bandgap DOI Open Access
Lu Zhang, Hang Zhou, Yongchao Xie

et al.

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

Published: Jan. 2, 2025

Abstract Series of layer‐by‐layer organic solar cells (LOSCs) are constructed by sequentially spin‐coating donor layer and acceptor layers. A champion power conversion efficiency (PCE) 18.79% is achieved from the LOSCs with PBQx‐TCl/ITIC/PY‐DT as active layers, which should be one top values among OSCs optical bandgap over 1.48 eV. The middle material ITIC has a complementary photon harvesting range PBQx‐TCl PY‐DT, leading to enhanced Meanwhile, can play vital role in energy charge transfer relay increase exciton utilization transport, confirmed varied FFs normal or inverted ITIC/PY‐DT PY‐DT/ITIC Over 7% PCE improvement employing form cascaded This work may provide an efficient strategy for improving performance LOSCs.

Language: Английский

Citations

9
Boosting the performance of ternary solar cells by fine-tuning the distribution of the third component DOI
Yan Zhang, Jing Peng, Zemin He

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162693 - 162693

Published: April 1, 2025

Language: Английский

Citations

0
Ternary Blend Organic Photovoltaics with High Efficiency and Stability Through Energy Transfer and Molecular Packing Induced by an A‐D‐A Small Molecule DOI Creative Commons
Bin Chang,

Chung‐Hao Chen,

Atsushi Yabushita

et al.

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

Published: April 21, 2025

Abstract A novel A‐D‐A type small molecule (DTP‐2EH‐IO2Cl) incorporating dithiophenepyrrole (DTP) core with indene‐dione (IO2Cl) side chain an intermediate band gap and rigid structure is incorporated into polymer donor PM6 one of the three A−DA′D−A acceptor—L8‐BO, BTP‐eC9 or Y6—for ternary‐blend organic photovoltaics (OPVs). The third component DTP‐2EH‐IO2Cl induces not only energy transfer but also stronger molecular packing acceptors, resulting in a larger coherence length enhanced absorption that enhances devices’ power conversion efficiencies (PCE) thermal stability. PCE values champion devices PM6:L8‐BO, PM6:BTP‐eC9, PM6:Y6 are 19.2, 18.3, 17.6%, respectively, versus 16.5, 15.8, 15.4% for their corresponding binary blend devices, displaying relative increases from 14 to 16%. stability (T 80 ) PM6:L8‐BO: ternary device dramatically 568 h 57 PM6:L8‐BO device. These enhancements can be attributed effectiveness as increasing light through inducing intermolecular providing effective way tune morphology boost both OPVs.

Language: Английский

Citations

0
Direct Arylation Polycondensation‐Derived Polythiophene Achieves Over 16% Efficiency in Binary Organic Solar Cells via Tuning Aggregation and Miscibility DOI
Xuwen Zhang, Tao Zhang, Ziqi Liang

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(47)

Published: Aug. 27, 2024

Abstract Polythiophenes are the most appealing donor materials in organic solar cells (OSCs) due to their simple chemical structures. However, top‐performance polythiophenes typically synthesized via Stille polycondensation, which is problematic significant toxicity and poor atom economy. By contrast, direct arylation polycondensation (DArP) an eco‐friendly, atom‐efficient alternative for synthesizing conjugated polymers, while best efficiency DArP‐derived below 12%. This study reports a series of polythiophene‐based donors DArP. Among these, PT4F‐Th reaches power conversion (PCE) 16.4%, not only matches current record materials, but also marks highest PCE achieved by date. The superior performance largely attributed its optimal temperature‐dependent aggregation behavior moderate miscibility with acceptors, along crystallinity among candidates, resulting favorable blend film morphology. underscores potential developing high‐performance eco‐friendly OSCs.

Language: Английский

Citations

3
Advancing Intrinsically Stretchable Organic Photovoltaics with a Nearly Amorphous Polymer Semiconductor DOI
L. Z. Pei, Dexia Han, Yuxuan Wang

et al.

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

Published: April 7, 2025

Abstract Current state‐of‐the‐art organic photovoltaic (OPV) films, composed of conjugated polymer donors and small molecule acceptors, are often limited by the high brittleness their rigid backbones, which restricts application in wearable devices. In contrast, all‐polymer OPVs have demonstrated enhanced intrinsic stretchability, but further advancements necessary to meet demands. Here, an uncharted strategy is reported enhance mechanical stretchability performance incorporating a nearly‐amorphous polymer, poly(indacenodithiophene‐co‐benzothiadiazole) (IDTBT) into layer‐by‐layer structured active layer. IDTBT possesses fracture strain ≈80%, significantly outperforming well‐known donor polymers like PM6. The incorporation enhances properties, with both optimized at low contents. More importantly, intrinsically stretchable demonstrate superior stability impressive power conversion efficiency 14.2%, highest date this category. Particularly, IDTBT‐strengthened retain 72% initial under tensile 50%, 68% even after being stretched hundreds times 30% strain, demonstrating exceptional stability. This approach underscores potential semiconductors designing highly OPVs, paving way for seamless integration electronics.

Language: Английский

Citations

0
Fluorine/bromine/selenium multi-heteroatoms substituted dual-asymmetric electron acceptors for o-xylene processed organic solar cells with 19.12% efficiency DOI Creative Commons
Yibo Zhou,

Guangyu Qi,

Han Liu

et al.

Science China Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 15, 2024

Abstract The development of high-performance near-infrared (NIR) absorbing electron acceptors is a major challenge in achieving high short-circuit current density ( J SC ) to increase power conversion efficiency (PCE) organic solar cells (OSCs). Herein, three new multi-heteroatomized Y-series (bi-asy-Y-Br, bi-asy-Y-FBr, and bi-asy-Y-FBrF) were developed by combining dual-asymmetric selenium-fused core brominated end-groups with different numbers fluorine substitutions. With gradually increasing fluorination, exhibit red-shift absorption. Among them, bi-asy-Y-FBrF presents planar molecular geometry, the maximum average electrostatic potential, minimum dipole moment, which are conducive intramolecular packing charge transport. Moreover, D18:bi-asy-Y-FBrF active layer higher crystallinity, more suitable phase separation, reduced recombination compared D18:bi-asy-Y-Br D18:bi-asy-Y-FBr blends. Consequently, among theses binary OSCs, device achieves PCE 15.74% an enhanced 26.28 mA cm −2 , while obtains moderate 15.04% highest open-circuit voltage V OC 0.926 V. Inspired its complementary absorption NIR-absorbing BTP-eC9 as acceptor, bi-asy-Y-Br introduced into D18:BTP-eC9 construct ternary further boosted 19.12%, top values for reported green solvent processed OSCs.

Language: Английский

Citations

3
Advancing the dynamic mechanical analysis of organic semiconductor materials DOI

Jintao Feng,

Chunlong Sun, Saimeng Li

et al.

Chemical Communications, Journal Year: 2024, Volume and Issue: 60(78), P. 10795 - 10804

Published: Jan. 1, 2024

Dynamic mechanical analysis (DMA) is a powerful technique for characterizing the properties of wide range materials. However, importance DMA in studying organic/polymer semiconductors has not been fully appreciated. In this Highlight, we explore recent advancements use understanding viscoelastic and thermal transitions organic semiconductor particular, insights gained from can serve as new guides device optimisation solar cells towards stable operation. Furthermore, present key findings, challenges, future directions to advance application electronics.

Language: Английский

Citations

0
Collaborative Morphological and Electrical Regulation of High-Mobility Conjugated Polymers via a Multifunctional Polymeric Additive DOI
Chenhui Xu, Chuanbin An, Mengyuan Gao

et al.

Macromolecules, Journal Year: 2024, Volume and Issue: 57(22), P. 10792 - 10801

Published: Nov. 8, 2024

Morphological and electrical control over conjugated polymers has a great potential for the fabrication of high-performance organic thin-film transistors (OTFTs). Herein, we employed multifunctional polymeric additive, namely, PBTTT-b-HTPB, to optimize molecular packing order an isoindigo-based model polymer (IIDSiC8) simultaneously regulate minority carriers boosted transport properties in OTFTs via facile solution processing. By detailed comparative study, demonstrated that PBTTT-b-HTPB remarkably improved crystallinity IIDSiC8 by forming elongated fibers with higher thin film, which originated from larger size ordered aggregates due presence insulating block. On other hand, p-type block PBTTT worked as hole trapping center, resulting significantly increased electron density, reduced off-current, optimal n-type performance. Benefiting collaborative morphological regulation, IIDSiC8/PBTTT-b-HTPB films displayed well-aligned morphology high mobility up close 7 cm2 V–1 s–1 together on/off ratio 106 bar-coated OTFTs. The is among top performance values reported polymers. Our work achieved simultaneous optimization film microstructures carrier characteristics semiconductors, providing opportunities production OTFT devices superior

Language: Английский

Citations

0