Recent progress and prospects of dimer and multimer acceptors for efficient and stable polymer solar cells

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(9), P. 4674 - 4706

Published: Jan. 1, 2024

This review summarizes the recent progress, key design principles and prospects of dimer multimer acceptors for developing polymer solar cells (PSCs) with high efficiency long-term stability.

Language: Английский

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Precisely Controlling Polymer Acceptors with Weak Intramolecular Charge Transfer Effect and Superior Coplanarity for Efficient Indoor All‐Polymer Solar Cells with over 27% Efficiency

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(32)

Published: May 28, 2024

Abstract Indoor photovoltaics (IPVs) are garnering increasing attention from both the academic and industrial communities due to pressing demand of ecosystem Internet‐of‐Things. All‐polymer solar cells (all‐PSCs), emerging as a sub‐type organic photovoltaics, with merits great film‐forming properties, remarkable morphological light stability, hold promise simultaneously achieve high efficiency long‐term operation in IPV's application. However, dearth polymer acceptors medium‐bandgap has impeded rapid development indoor all‐PSCs. Herein, highly efficient acceptor (PYFO‐V) is reported through synergistic effects side chain engineering linkage modulation applied for all‐PSCs operation. As result, PM6:PYFO‐V‐based all‐PSC yields highest 27.1% under LED condition, marking value binary date. More importantly, blade‐coated devices using non‐halogenated solvent ( o ‐xylene) maintain an over 23%, demonstrating potential industry‐scale fabrication. This work not only highlights importance fine‐tuning intramolecular charge transfer effect intrachain coplanarity developing high‐performance but also provides strategy

Language: Английский

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The Phase Separation Control in All‐Polymer Solar Cells

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

Published: March 17, 2025

ABSTRACT All‐polymer solar cells (all‐PSCs) are of interest owing to their unique advantages, including remarkably improved device stability and exceptional mechanical stretchability. Over recent years, there has been a notable increase in the power conversion efficiency (PCE) all‐PSCs, largely attributed advancements morphology control active layer. Notably, domain size is paramount importance as it impacts critical factors such exciton dissociation, charge transport, collection. However, low glass transition temperature conjugated polymers, coupled with minimal change mixing entropy, often results an excessive degree phase separation. Consequently, essential comprehend evolution separation develop strategies regulate size. In this review, we elucidate key parameters that contribute enhancement present qualitative quantitative characterization techniques for Building on foundation, introduce principles regulating sizes, encompassing crystallinity, miscibility, molecular conformation from thermodynamic perspective, well film‐forming kinetics crystallization sequence kinetic perspective. Lastly, offer insights into current challenges potential future prospects all‐PSCs.

Language: Английский

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Efficient and Photostable Organic Solar Cells Achieved by Alloyed Dimer Acceptors with Tailored Linker Structures

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

Published: June 27, 2024

Abstract High power conversion efficiency (PCE) and long‐term stability are prerequisites for commercialization of organic solar cells (OSCs). Herein, two dimer acceptors (DYTVT DYTCVT) developed with different properties through linker engineering, study their effects as alloy‐like on the photovoltaic performance photostability OSCs. These ternary OSCs effectively combine advantages both acceptors. DYTVT, characterized by its high backbone planarity, ensures elevated electron mobility glass‐transition temperature ( T g ), leading to efficient charge transport enhanced Conversely, DYTCVT, significant dipole moment electrostatic potential, enhances compatibility alloy donors refines blend morphology, facilitating generation in Consequently, D18:DYTVT:DYTCVT exhibit higher PCE (18.4%) compared D18:MYT (monomer acceptor, = 16.5%), D18:DYTVT (PCE 17.4%), D18:DYTCVT 17.0%) Furthermore, owing (133 °C) than MYT 80 DYTCVT 120 °C), have significantly t 80% lifetime 4250 h under 1‐sun illumination) 40 h) 2910 h).

Language: Английский

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Impact of Linker Engineering in Core‐Linked Dimeric Acceptors for High‐Performance Organic Solar Cells

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(41)

Published: July 3, 2024

Abstract The dimerization of small molecule acceptors (SMAs) is a promising strategy for enhancing the long‐term stability and power conversion efficiency (PCE) organic solar cells (OSCs). However, reported DSMAs are primarily limited to end‐linked molecular configurations, highlighting need further exploration various dimer architectures. Herein, development two distinct core‐linked dimerized SMAs (DYF‐V DYF‐E) with tailored linker structures (vinylene ethynyl, respectively), achieving high‐performance OSCs (PCE = 18.53%). Interestingly, subtle change in results markedly different properties photovoltaic performances acceptors. DYF‐E an ethynyl exhibits more twisted backbone conformation mitigated aggregation property compared DYF‐V, inducing desirable blend morphologies polymer donor including high crystallinity, face‐on oriented packing structures, well‐intermixed domains. Thus, DYF‐E‐based exhibit PCE (17.02%), which significantly outperforms DYF‐V‐based 9.98%). Furthermore, ternary based on achieve higher 18.53%. this study highlights significance selecting appropriate producing OSCs.

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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End‐extended Conjugation Strategy to Reduce the Efficiency‐Stability‐Mechanical Robustness Gap in Binary All‐Polymer Solar Cells

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

Published: Oct. 10, 2024

Concurrently achieving high efficiency, mechanical robustness and thermal stability is critical for the commercialization of all-polymer solar cells (APSCs). However, APSCs usually demonstrate complicated morphology, primarily attributed to polymer chain entanglement which has a detrimental effect on their fill factors (FF) morphology stability. To address these concerns, an end-group extended acceptor, PY-NFT, was synthesized studied. The analysis showed tightly ordered molecular packing mode favorable phase separation formed. PM6 : PY-NFT-based device achieved exceptional PCE 19.12 % (certified as 18.45 %), outperforming control PY-FT devices (17.14 %). This significant improvement highlights record-high binary APSCs. aging study revealed that PY-NFT blend exhibited excellent morphological stability, thereby superior retaining 90 initial efficiency after enduring stress (65 °C) 1500 hours. More importantly, film outstanding ductility with crack onset strain 24.1 %. Overall, rational chemical structure innovation, especially conjugation extension strategy trigger appropriate stable key improved robust

Language: Английский

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Progress in Non‐Fullerene Acceptors: Evolution from Small to Giant Molecules

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

Published: July 18, 2024

Abstract With the rapid development of non‐fullerene acceptors (NFAs), power conversion efficiency (PCE) organic solar cells (OSCs) is increasing. According to their different chemical structures, NFAs can initially be divided into two categories: small molecule (SMAs) and polymerized (PSMAs). Due strong absorption capacity controllable energy levels, PCE devices based on SMAs has approached 20 %. Compared with SMAs, PSMAs have advantages in stability flexibility, PSMA‐based exceeded 18 However, higher synthesis cost lower batch repeatability hinder its further development. Recently, concept giant (GMAs) been proposed. These materials a clear molecular structure are considered novel acceptor that combine PSMAs. Currently, GMAs 19 In this review, we will introduce latest developments PSMAs, GMAs. Then, relationship between performance analyzed. end, perspectives opportunities challenges these provided, which could inspire for advanced OSCs.

Language: Английский

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Tetramerized Small‐Molecule Acceptor for Organic Solar Cells with Enhanced Efficiency, Stability, and Mechanical Robustness: Impact of Chain Length and Dispersity Effects

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

Published: Aug. 1, 2024

Abstract Discrete dimer or multimer acceptors have enhanced the stability of organic solar cells (OSCs) due to their slow diffusion kinetics resulting from large molecular sizes. However, development with chain length longer than trimers has been challenging, which often require multistep reactions low synthetic yield. In this study, a new discrete tetramer acceptor (TetA) using one‐pot reaction and subsequent purification processes is developed. During purification, (DA) trimer (TA) are also obtained. The OSCs for TetA demonstrate higher power conversion efficiency (PCE) 16.14% those shorter lengths, such as monomer (MA, 12.85%), DA (14.31%), TA (15.10%). Additionally, despite having similar number‐average weight, TetA‐based exhibit significantly PCE (16.14%) compared based on mixture (MixA) dispersity (10.72%). Furthermore, highest photostability mechanical robustness among series. For example, superior ( t 70% lifetime = 2180 h under 1‐sun illumination) (crack‐onset strain (COS) 8%) MA 220 h, COS 2%), MixA 745 6%).

Language: Английский

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Exploring the Origin of High Thermal Stability of the Performance of Pseudo-Quaternary All-Polymer Solar Cells

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: 17(9), P. 14329 - 14341

Published: Feb. 25, 2025

As all-polymer solar cells (all-PSCs) have achieved impressive power conversion efficiencies (PCEs), extending their lifetime under long-term operation is also increasingly important. To address this issue, in study, a new pseudo-quaternary blend composed of conjugated block copolymer donors and acceptors, PM6-b-TT:b-PYT, introduced as the active layer for all-PSCs. Compared to all-PSC based on traditional binary blend, PM6:BTTP-T, those exhibited significantly improved thermal stability after annealing harsh conditions 150 °C an ambient atmosphere. More importantly, elucidate morphological layer, visible evidence thin film's surface internal structure carefully investigated by multiple advanced techniques. After extended stress at °C, bulk heterojunction (BHJ) films exhibit excessive polymer chain aggregation, phase separation polymers, increased roughness, forming charge traps increasing exciton recombination. Meanwhile, BHJ maintain crystallinity nanostructure improving Overall, study provides detailed understanding high-efficiency all-PSCs, offering key insights into section proposing promising structures

Language: Английский

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