Tuning polymer-backbone coplanarity and conformational order to achieve high-performance printed all-polymer solar cells DOI Creative Commons
Yilei Wu, Yue Yuan, Diego Sorbelli

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: March 9, 2024

All-polymer solar cells (all-PSCs) offer improved morphological and mechanical stability compared with those containing small-molecule-acceptors (SMAs). They can be processed a broader range of conditions, making them desirable for printing techniques. In this study, we report high-performance polymer acceptor design based on bithiazole linker (PY-BTz) that are par SMAs. We demonstrate induces more coplanar ordered conformation to bithiophene due the synergistic effect non-covalent backbone planarization reduced steric encumbrances. As result, PY-BTz shows significantly higher efficiency 16.4% in comparison acceptors commonly used thiophene-based linkers (i.e., PY-2T, 9.8%). Detailed analyses reveal improvement is associated enhanced conjugation along closer interchain π-stacking, resulting charge mobilities, suppressed recombination, energetic disorder. Remarkably, an 14.7% realized all-PSCs solution-sheared ambient which among highest devices prepared under conditions relevant scalable This work uncovers strategy promoting emerging lead superior all-PSCs.

Language: Английский

Sequentially regular polymer acceptors featuring flexible spacers for high-performance and mechanically robust all-polymer solar cells DOI Creative Commons
Jin‐Woo Lee,

Cheng Sun,

Sunwoo Lee

et al.

Energy & Environmental Science, Journal Year: 2022, Volume and Issue: 15(11), P. 4672 - 4685

Published: Jan. 1, 2022

We report a new molecular design of sequentially regular polymerized small-molecule-acceptors containing flexible spacer (FS) units (PYFS-Reg) to achieve all-polymer solar cells with both high-performance and mechanical stretchability.

Language: Английский

Citations

88
A Top‐Down Strategy to Engineer ActiveLayer Morphology for Highly Efficient and Stable All‐Polymer Solar Cells DOI
Huiting Fu, Zhengxing Peng, Qunping Fan

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(33)

Published: June 24, 2022

A major challenge hindering the further development of all-polymer solar cells (all-PSCs) employing polymerized small-molecule acceptors is relatively low fill factor (FF) due to difficulty in controlling active-layer morphology. The issues typically arise from oversized phase separation resulting thermodynamically unfavorable mixing between two macromolecular species, and disordered molecular orientation/packing highly anisotropic polymer chains. Herein, a facile top-down strategy engineer morphology blends developed by leveraging layer-by-layer (LBL) deposition. Optimal intermixing components can be achieved two-step process tuning bottom-layer swelling during top-layer Consequently, both bottom layer ordering top optimized with suitable processing solvent. favorable gradient vertical composition distribution for efficient charge transport extraction therefore realized, affording high all-PSC efficiency 17.0% FF 76.1%. derived devices also possess excellent long-term thermal stability retain >90% their initial efficiencies after being annealed at 65 °C 1300 h. These results validate distinct advantages an LBL protocol fabricate high-performance all-PSCs.

Language: Английский

Citations

80
Improved Molecular Ordering in a Ternary Blend Enables All‐Polymer Solar Cells over 18% Efficiency DOI Open Access

Yunhao Cai,

Cong Xie, Qian Li

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(8)

Published: Dec. 3, 2022

Although all-polymer solar cells (all-PSCs) show great commercialization prospects, their power conversion efficiencies (PCEs) still fall behind small molecule acceptor-based counterparts. In blends, the optimized morphology and high molecular ordering are difficult to achieve since there is troublesome competition between crystallinity of polymer donor acceptor during film-formation process. Therefore, it challenging improve performance all-PSCs. Herein, a ternary strategy adopted modulate an blend, in which PM6:PY-82 selected as host blend PY-DT employed guest component. Benefiting from favorable miscibility two acceptors higher regularity PY-DT, matrix features well-defined fibrillar improved ordering. Consequently, champion PM6:PY-82:PY-DT device produces record-high PCE 18.03%, with simultaneously open-circuit voltage, short-circuit current fill factor comparison binary devices. High-performance large-area (1 cm2 ) thick-film (300 nm) all-PSCs also successfully fabricated PCEs 16.35% 15.70%, respectively.Moreover, 16.5 organic module affords encouraging 13.84% when using non-halogenated solvent , showing potential "Lab-to-Fab" transition

Language: Английский

Citations

78
Unraveling the Correlations between Mechanical Properties, Miscibility, and Film Microstructure in All‐Polymer Photovoltaic Cells DOI
Kangkang Zhou, Kaihu Xian,

Qingchun Qi

et al.

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(30)

Published: May 6, 2022

Abstract The rapid development of low bandgap polymer acceptors has promoted the efficiency up to ≈17% for all‐polymer solar cells (all‐PSCs). Nevertheless, polymeric blend film, core photoelectric conversion all‐PSCs, not been thoroughly understood in terms influence and regulatory factors mechanical properties, which hinders advances flexible wearable applications. Herein, a range characterization methods is combined investigate miscibility, film microstructure blends based on several representative donors (PTzBI‐Si, PTVT‐T, PM6 PTQ10) benchmark acceptor N2200, further reveal miscibility‐property relationships miscibility property. results stress that fracture behaviors elastic moduli these with varied compositions show different changing trends, are affected by molecular interactions aggregated structure blends. four can be nicely predicted models deduced from macromolecular mechanics. Most crucially, correlations between modulus, morphology, elucidated first time. derived validated another high‐efficiency will key successful fabrication mechanically robust stretchable all‐PSCs high efficiency.

Language: Английский

Citations

77
Trimerized small-molecule acceptors enable high-performance organic solar cells with high open-circuit voltage and prolonged life-time DOI Creative Commons
Jin‐Woo Lee,

Cheng Sun,

Tan Ngoc‐Lan Phan

et al.

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(8), P. 3339 - 3349

Published: Jan. 1, 2023

We report a new trimer acceptor (TYT) composed of three Y-based molecules connected by electron-donating spacers. The TYT enables high-performance and stable organic solar cell (OSC) with t 80% lifetime >8000 h under 1 sun illumination.

Language: Английский

Citations

77
Recent Progress in π-Conjugated Polymers for Organic Photovoltaics: Solar Cells and Photodetectors DOI
Chunchen Liu, Lin Shao, Shihao Chen

et al.

Progress in Polymer Science, Journal Year: 2023, Volume and Issue: 143, P. 101711 - 101711

Published: June 25, 2023

Language: Английский

Citations

76
Recent Developments of Polymer Solar Cells with Photovoltaic Performance over 17% DOI
Jianghao Jin,

Qiao Wang,

Kaige Ma

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(14)

Published: Jan. 22, 2023

Abstract With the emergence of ADA'DA‐type (Y‐series) non‐fullerene acceptors (NFAs), power conversion efficiencies (PCEs) organic photovoltaic devices have been constantly refreshed and gradually reached 20% in recent years (19% for single junction tandem device). The possess specific design concept, which greatly enrich NFA types excellent compatibility with many donor materials. It is gratifying to note that previously underperforming materials combine these regulated shine again. Nowadays, concept modular widely used research donors, injecting new vitality into field photovoltaics. Furthermore, also promote multicomponent devices, bilayer processing solvent engineering, additive engineering. Herein, latest progresses polymer solar cells efficiency over 17% are briefly reviewed from aspects active material design, interface development, device technology. At last, opportunities challenges commercialization future discussed.

Language: Английский

Citations

74
Benzothiadiazole-based polymer donors DOI

Peiqing Cong,

Zongtao Wang, Yanfang Geng

et al.

Nano Energy, Journal Year: 2022, Volume and Issue: 105, P. 108017 - 108017

Published: Nov. 17, 2022

Language: Английский

Citations

71
Effects of Halogenation of Small‐Molecule and Polymeric Acceptors for Efficient Organic Solar Cells DOI Open Access
Han Yu, Yan Wang,

Xinhui Zou

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(22)

Published: Feb. 23, 2023

Abstract Tuning the properties of non‐fullerene acceptors (NFAs) through halogenation, including fluorination and chlorination, represents one most promising strategies to boost performance organic solar cells (OSCs). However, it remains unclear how F Cl choice influences molecular packing between small‐molecule polymeric acceptors. Here, a series with different amounts types halogenation is synthesized, effects chlorination are investigated. It found that chlorinated lead longer exciton diffusion length better compared corresponding fluorinated ones, which attributes their stronger intermolecular mode. For polymer acceptors, in contrast, polymers achieve denser mode performance, because exhibit reduced intrachain conjugation end group moieties linker units. This study demonstrates on modes performances for provides important guidance molecule design high‐performance OSCs.

Language: Английский

Citations

64
Dithienoquinoxalineimide‐Based Polymer Donor Enables All‐Polymer Solar Cells Over 19 % Efficiency DOI
Zongtao Wang, Xin Wang,

Lijun Tu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(21)

Published: Feb. 22, 2024

All-polymer solar cells (all-PSCs) have been regarded as one of the most promising candidates for commercial applications owing to their outstanding advantages such mechanical flexibility, light weight and stable film morphology. However, compared large amount new-emerging excellent polymer acceptors, development high-performance donor lags behind. Herein, a new D-π-A type donor, namely QQ1, was developed based on dithienoquinoxalineimide (DTQI) A unit, benzodithiophene with thiophene-conjugated side chains (BDTT) D alkyl-thiophene π-bridge, respectively. QQ1 not only possesses strong dipole moment, but also shows wide band gap 1.80 eV deep HOMO energy level -5.47 eV, even without halogen substituents that are commonly indispensable donors. When blended classic acceptor PY-IT, QQ1-based all-PSC delivers an PCE 18.81 %. After introduction F-BTA3 third component, record 19.20 % obtained, highest value reported so far all-PSCs. The impressive photovoltaic performance originates from broad absorption range, reduced loss, compact π-π stacking. These results provide insight in rational design novel nonhalogenated donors further

Language: Английский

Citations

63