Unveiling the Morphological and Physical Mechanism of Burn‐in Loss Alleviation by Ternary Matrix Toward Stable and Efficient All‐Polymer Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(18)

Published: Feb. 10, 2023

All-polymer solar cells (All-PSCs) are considered the most promising candidate in achieving both efficient and stable organic photovoltaic devices, yet field has rarely presented an in-depth understanding of corresponding device stability while efficiency is continuously boosted via innovation polymer acceptors. Herein, a ternary matrix built for all-PSCs with optimized morphology, improved film ductility importantly, better operational than its parental binary counterparts, as platform to study underlying mechanism. The target system PQM-Cl:PTQ10:PY-IT (0.8:0.2:1.2) exhibits alleviated burn-in loss morphology under light soaking, which supports promoted lifetime. comprehensive characterizations fresh light-soaked active layers lead clear illustration opposite morphological physical degradation direction PQM-Cl PTQ10, thus resulting delicate balance at optimal system. Specifically, enlarging tendency shrinking preference PTQ10 terms phase separation leads their mixing phase; hole transfer kinetics PQM-Cl:PY-IT host stabilized by incorporating PTQ10. This work succeeds reaching deep insight into all-PSC's promotion rational design, booms prospect gaining high-performance all-PSCs.

Language: Английский

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Ternary All‐Polymer Solar Cells with Efficiency up to 18.14% Employing a Two‐Step Sequential Deposition

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(7)

Published: Nov. 22, 2022

Abstract Achieving a finely tuned active layer morphology with suitable vertical phase to facilitate both charge generation and transport has long been the main goal for pursuing highly efficient bulk heterojunction all‐polymer solar cells (all‐PSCs). Herein, solution address above challenge via synergistically combining ternary blend strategy layer‐by‐layer (LbL) procedure is proposed. By introducing synthesized polymer acceptor ( P A ), PY‐Cl, higher crystallinity into designed host PY‐SSe‐V, distribution molecular ordering of LbL‐type all‐PSCs can be improved in comparison PM6/PY‐SSe‐V binary all‐PSCs. The formation superior microstructure not only promote extraction properties but also reduce energetic disorder non‐radiative recombination loss, thus improving all three photovoltaic parameters simultaneously. Consequently, PM6/(PY‐SSe‐V:PY‐Cl) show best efficiency 18.14%, which among highest values reported date This work provides facile effective obtaining high‐efficiency

Language: Английский

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High-Performance Intrinsically Stretchable Polymer Solar Cell with Record Efficiency and Stretchability Enabled by Thymine-Functionalized Terpolymer

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(22), P. 11914 - 11920

Published: May 23, 2023

Designing new polymer semiconductors for intrinsically stretchable solar cells (IS-PSCs) with high power conversion efficiency (PCE) and durability is critical wearable electronics applications. Nearly all high-performance PSCs are constructed using fully conjugated donors (PD) small-molecule acceptors (SMA). However, a successful molecular design of PDs mechanically durable IS-PSCs without sacrificing conjugation has not been realized. In this study, we novel thymine side chain terminated 6,7-difluoro-quinoxaline (Q-Thy) monomer synthesize series (PM7-Thy5, PM7-Thy10, PM7-Thy20) featuring Q-Thy. The Q-Thy units capable inducing dimerizable hydrogen bonding enable strong intermolecular PD assembly highly efficient robust PSCs. PM7-Thy10:SMA blend demonstrates combination PCE (>17%) in rigid devices excellent stretchability (crack-onset value >13.5%). More importantly, PM7-Thy10-based show an unprecedented (13.7%) ultrahigh mechanical (maintaining 80% initial after 43% strain), illustrating the promising potential commercialization

Language: Английский

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Dithienoquinoxalineimide‐Based Polymer Donor Enables All‐Polymer Solar Cells Over 19 % Efficiency

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

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Green-Solvent Processed Blade-Coating Organic Solar Cells with an Efficiency Approaching 19% Enabled by Alkyl-Tailored Acceptors

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: Nov. 2, 2023

Abstract Power-conversion-efficiencies (PCEs) of organic solar cells (OSCs) in laboratory, normally processed by spin-coating technology with toxic halogenated solvents, have reached over 19%. However, there is usually a marked PCE drop when the blade-coating and/or green-solvents toward large-scale printing are used instead, which hampers practical development OSCs. Here, new series N -alkyl-tailored small molecule acceptors named YR-SeNF same molecular main backbone developed combining selenium-fused central-core and naphthalene-fused end-group. Thanks to -alkyl engineering, NIR-absorbing show different crystallinity, packing patterns, miscibility polymeric donor. The studies exhibit that packing, vertical distribution active layer morphologies well optimized introducing newly designed guest acceptor associated tailored chains, providing improved charge transfer dynamics stability for PM6:L8-BO:YR-SeNF-based As result, record-high approaching 19% achieved OSCs fabricated from green-solvent o -xylene high-boiling point. Notably, ternary offer robust operating under maximum-power-point tracking well-keep > 80% initial PCEs even 400 h. Our alkyl-tailored strategy provides unique approach develop high-efficiency stable OSCs, paves way industrial development.

Language: Английский

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Rigid- and soft-block-copolymerized conjugated polymers enable high-performance intrinsically stretchable organic solar cells

Joule, Journal Year: 2023, Volume and Issue: 8(1), P. 204 - 223

Published: Dec. 1, 2023

Language: Английский

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Recent research progress of all-polymer solar cells based on PSMA-type polymer acceptors

Chem, Journal Year: 2023, Volume and Issue: 9(7), P. 1702 - 1767

Published: June 21, 2023

Language: Английский

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Optimizing Double‐Fibril Network Morphology via Solid Additive Strategy Enables Binary All‐Polymer Solar Cells with 19.50% Efficiency

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 16, 2024

Double-fibril network morphology (DFNM), in which the donor and acceptor can self-assemble into a double-fibril structure, is beneficial for exciton dissociation charge transport organic solar cells. Herein, it demonstrated that such DFNM be constructed optimized all-polymer cells (all-PSCs) with assistance of 2-alkoxynaphthalene volatile solid additives. It revealed incorporation induce stepwise regulation aggregation molecules during film casting thermal annealing processes. Through altering alkoxy additives, both intermolecular interactions molecular miscibility host materials precisely tuned, allows optimization process facilitation self-assembly, thus leading to reinforced packing DFNM. As result, an unprecedented efficiency 19.50% (certified as 19.1%) obtained 2-ethoxynaphthalene-processed PM6:PY-DT-X all-PSCs excellent photostability (T

Language: Английский

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Rapid solidification for green-solvent-processed large-area organic solar modules with >16% efficiency

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(8), P. 2935 - 2944

Published: Jan. 1, 2024

A rapid solidification strategy was developed for simultaneously avoiding the Marangoni effect and suppressing molecular aggregation. The resultant 15.64 cm 2 large-area OSC module exhibited a record power conversion efficiency of 16.03%.

Language: Английский

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Ternary Strategy Enables Non‐Halogenated Solvent‐Processed All‐Polymer Solar Cells with High Efficiency Over 18%

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(21)

Published: Jan. 31, 2024

Abstract Herein, efficient ternary all‐polymer solar cells (all‐PSCs) are fabricated by employing PDEDTQ that possesses down‐shifted highest occupied molecular orbital (HOMO) level and blue‐shifted absorption with higher maximum coefficients compared the host donor JD40‐BDD20 as a guest into JD40‐BDD20:PA‐5 blend. The enhanced light‐harvesting energy transfer from to can be observed in device, which conduces improving short circuit current density ( J SC ). Additionally, shows relatively weak crystalline well miscibility JD40‐BDD20, meaning morphology tuned using PDEDTQ. Subsequently, more uniform fine‐divided network slightly weakened occurs blend film, implying intermixing domain of donor/acceptor (D/A) interfaces may formed. Thus, JD40‐BDD20:PA‐5, device obtained exciton dissociation charge extraction, reducing recombination loss E Ultimately, addition guaranteeing outstanding fill factor (FF), improve open voltage V OC ) achieved then boosted power conversion efficiency (PCE) 17.39% 18.47%, is one PCEs for all‐PSCs. Overall, this work provides guidance on forming high‐quality distribution D/A strategy, obtaining high‐efficiency all‐PSCs processed non‐halogenated solvent.

Language: Английский

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