Isomerized Green Solid Additive Engineering for Thermally Stable and Eco‐Friendly All‐Polymer Solar Cells with Approaching 19% Efficiency

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(49)

Published: Oct. 12, 2023

Laboratory-scale all-polymer solar cells (all-PSCs) have exhibited remarkable power conversion efficiencies (PCEs) exceeding 19%. However, the utilization of hazardous solvents and nonvolatile liquid additives poses challenges for eco-friendly commercialization, resulting in trade-off between device efficiency operation stability. Herein, an innovative approach based on isomerized solid additive engineering is proposed, employing volatile dithienothiophene (DTT) isomers to modulate intermolecular interactions facilitate molecular stacking within photoactive layers. Through elucidating underlying principles DTT-induced polymer assembly level, a PCE 18.72% achieved devices processed with environmentally benign solvents, ranking it among highest record values all-PSCs. Significantly, such superiorities DTT-isomerized strategy afford excellent compatibility large-area blade-coating techniques, offering promising pathway industrial-scale manufacturing Moreover, these demonstrate enhanced thermal stability extrapolated T80 lifetime 14 000 h, further bolstering their potential sustainable technological advancement.

Language: Английский

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Layered All‐Polymer Solar Cells with Efficiency of 18.34% by Employing Alloyed Polymer Donors

Small, Journal Year: 2025, Volume and Issue: 21(11)

Published: Feb. 7, 2025

Abstract A series of layered all‐polymer solar cells (LA‐PSCs) with the normal or inverted structure are prepared by employing a sequential spin‐coating method PBQx‐TCl, PM1 as polymer donor, and PY‐DT acceptor. The power conversion efficiency (PCE) LA‐PSCs can be improved from 17.20% to 18.34% incorporating 30 wt.% into PBQx‐TCl layer, resulting simultaneously increased J SC 25.35 mA cm −2 , V OC 0.971 FF 74.49%. PCE improvement also achieved PBQx‐TCl:PM1 donor layers. mixed prefer form alloyed states in LA‐PSCs, which confirmed gradually s more content Meanwhile, photogenerated excitons layers dissociated at interface between PM1, especially for located near ITO electrode. exciton dissociation provide an additional channel improving utilization efficiency, positive external quantum spectral difference (∆EQE) values Over 6.6% realized using layer.

Language: Английский

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High-performance binary all-polymer solar cells enabled by a Y-derivative pendant random-copolymerized polymer acceptor with a broad donor–acceptor matching tolerance

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(13), P. 7754 - 7764

Published: Jan. 1, 2024

A new polymer acceptor with Y-derivative pendants is designed to effectively improve donor/acceptor compatibility and blend morphology construct high-performance binary all-polymer solar cells a broad donor–acceptor matching tolerance.

Language: Английский

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Polythiophene and its derivatives for all-polymer solar cells

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(27), P. 16251 - 16267

Published: Jan. 1, 2024

We review polythiophene and its derivative (PT)-based polymer donors for all-PSCs, focusing on material design, morphology optimization strategies, the selection design of acceptors that complement their properties.

Language: Английский

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The revival of 4H-cyclopenta[2,1-b:3,4-b′]dithiophene (CPDT) driven by low-cost and high-performance nonfused-ring electron acceptors

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(29), P. 17973 - 17991

Published: Jan. 1, 2024

This review comprehensively summarizes the development history of CPDT-based organic photovoltaic materials, which contributes to a deeper understanding revival CPDT driven by low-cost acceptors.

Language: Английский

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A Fluorinated Imide‐Functionalized Arene Enabling a Wide Bandgap Polymer Donor for Record‐Efficiency All‐Polymer Solar Cells

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 15, 2024

Abstract All‐polymer solar cells (all‐PSCs) present compelling advantages for commercial applications, including mechanical durability and optical thermal stability. However, progress in developing high‐performance polymer donors has trailed behind the emergence of excellent acceptors. In this study, we report a new electron‐deficient arene, fluorinated bithiophene imide (F‐BTI) its donor SA1, which two fluorine atoms are introduced at outer β ‐positions thiophene rings BTI to fine‐tune energy levels aggregation resulting polymers. SA1 exhibits deep HOMO level −5.51 eV, wide bandgap 1.81 eV suitable miscibility with acceptor. Polymer chains incorporating F‐BTI result highly ordered π–π stacking favorable phase‐separated morphology within all‐polymer active layer. Thus, : PY‐IT‐based all‐PSCs exhibit an efficiency 16.31 % stability, is further enhanced record value 19.33 (certified: 19.17 %) by constructing ternary device. This work demonstrates that offers effective route materials improved optoelectronic properties, will change scenario terms stable all‐PSCs.

Language: Английский

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Non‐covalent Intramolecular Interactions Induced High‐Performance Terpolymer Donors

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(13)

Published: Dec. 14, 2023

Abstract Ternary polymerization are demonstrated as a feasible and successful method of optimizing absorption, energy level, crystallinity by maintaining the excellent properties polymer matrix. However, third unit inevitably interrupts periodic sequence distribution ordering packing conjugated backbones, thus balancing trade‐off between advantages component disruption caused nonperiodic remains great challenge. Herein, two terpolymer donors L1 L2 developed introducing diethyl‐5,5′“‐dibromo‐4,4′”‐bis(2‐ethylhexyl)‐[2,2′:5′,2′'‐terthiophene]‐3′,4′‐dicarboxylate (DDT) component. Owing to electron‐deficient ability S···O non‐covalent intramolecular interactions DDT, terpolymers displays deeper levels, enhanced molecular rigidity, planarity than PM6. After blending with L8‐BO, L1‐based solar cells exhibit well miscibility leading more well‐defined nanofibrous morphology, face‐on orientation, slight loss in blend films. As result, optimized L1:L8‐BO‐based device achieves record power conversion efficiency (PCE) high 18.75%. This work provides strategy develop high‐performance via utilizing improve donors.

Language: Английский

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The Renaissance of Poly(3‐hexylthiophene) as a Promising Hole‐Transporting Material Toward Efficient and Stable Perovskite Solar Cells

Small, Journal Year: 2024, Volume and Issue: unknown

Published: May 25, 2024

To push the commercialization of promising photovoltaic technique perovskite solar cells (PSCs), three-element golden law efficiency, stability, and cost should be followed. As key component PSCs, hole-transporting materials (HTMs) involving widely-used organic semiconductors such as 2,2',7,7'-tetrakis-(N,N-di-4-methoxyphenylamino)-9,9'-spirobifluorene (Spiro-OMeTAD) or poly(triarylamine) (PTAA) usually suffer high-cost preparation low operational stability. Fortunately, studies on classical p-type polymer poly(3-hexylthiophene) (P3HT) an alternative HTM have recently sparked a broad interest due to its low-cost synthesis, excellent batch-to-batch purity, superior hole conductivity well controllable stable film morphology. Despite this, device efficiency still lags behind P3HT-based PSCs mainly owing mismatched energy level poor interfacial contact between P3HT layer. Hence, in this review, study timely summarizes developed strategies for overcoming corresponding issues interface engineering, morphology regulation, formation composite HTMs from which some critical clues can extracted provide guidance further boosting stability devices. Finally, outlook, future research directions either viewpoint material design engineering are outlined.

Language: Английский

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Tailoring Interfacial Dipole Molecules to Mitigate Carrier and Energy Losses in Perovskite Solar Cells

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

Published: Sept. 11, 2024

Abstract Interface engineering has become the mainstream for improving performance of perovskite solar cells (PSCs). Interfacial dipole (ID) molecules have emerged as a feasible and effective strategy to alleviate charge carrier loss energy in PSCs. Here, three symmetrical donor–acceptor interfacial (named PzT, PzTE, PzTN) are designed synthesized with identical hole transport backbone different anchoring groups. The ID molecule is introduced into interface between layer layer. moments regulate surface work function energy‐level alignment perovskites, improve extraction, reduce at interface. Meanwhile, groups coordinate defects on PVK HTL, trap state density accumulation, mitigate non‐radiative recombination losses. As result, PzTN‐modified PSC achieved champion power conversion efficiency 25.34% photovoltage 1.176 V fill factor (FF) 83.27%, accompanied by almost undetectable hysteresis excellent operating stability. This research demonstrates efficient stable PSCs molecules.

Language: Английский

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Regioselective Fluorination of Thiophene-Based Heterocycles for Modulation of Multiple Physical Properties in Organic Semiconductors

Organic Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Thiophene-based derivatives are cost-effective and promising electron-donating units in high-performance π-conjugated materials for organic electronics. Fluorination is crucial modulating their electronic structural properties; however, few studies have been conducted due to synthetic challenges. We developed a fluorination method that enables regioselective of thiophene-based heterocycles. Our comparative study revealed the position number fluorine atoms fine-tune molecular orbital energies interactions, providing valuable insights semiconductor applications.

Language: Английский

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