Oligomerized Fused‐Ring Electron Acceptors for Efficient and Stable Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(46)

Published: July 12, 2023

Abstract Organic solar cells (OSCs) have attracted wide research attention in the past decades. Very recently, oligomerized fused‐ring electron acceptors (OFREAs) emerged as a promising alternative to small‐molecular/polymeric acceptor‐based OSCs due their unique advantages such well‐defined structures, batch reproducibility, good film formation, low diffusion coefficient, and excellent stability. So far, rapid advances been made development of OFREAs consisting directly/rigidly/flexibly linked oligomers fused ones. In this Minireview, we systematically summarized recent progress OFREAs, including structural diversity, synthesis approach, molecular conformation packing, long‐term Finally, conclude with future perspectives on challenges be addressed potential directions. We believe that Minireview will encourage novel for OSC applications.

Language: Английский

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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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Non‐Fully Conjugated Dimerized Giant Acceptors with Different Alkyl‐Linked Sites for Stable and 19.13 % Efficiency Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(14)

Published: Feb. 9, 2024

Abstract Achieving both high power conversion efficiency (PCE) and device stability is a major challenge for the practical development of organic solar cells (OSCs). Herein, three non‐fully conjugated dimerized giant acceptors (named 2Y‐sites, including wing‐site‐linked 2Y‐wing, core‐site‐linked 2Y‐core, end‐site‐linked 2Y‐end) are developed. They share similar monomer precursors but have different alkyl‐linked sites, offering fine‐tuned molecular absorption, packing, glass transition temperature, carrier mobility. Among their binary active layers, D18/2Y‐wing has better miscibility, leading to optimized morphology more efficient charge transfer compared D18/2Y‐core D18/2Y‐end. Therefore, D18/2Y‐wing‐based OSCs achieve superior PCE 17.73 %, attributed enhanced photocurrent fill factor. Furthermore, exhibit balance improved stability, distinguishing them within 2Y‐sites. Building on success 2Y‐wing in systems, we extend its application ternary by pairing it with near‐infrared absorbing D18/BS3TSe‐4F host. Thanks complementary absorption 300–970 nm further morphology, obtain higher 19.13 setting new benchmark dimer‐derived OSCs. This approach site engineering constructing presents promising pathway improve

Language: Английский

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A dendritic hexamer acceptor enables 19.4% efficiency with exceptional stability in organic solar cells

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 20, 2025

Language: Английский

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Precise synthesis and photovoltaic properties of giant molecule acceptors

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Dec. 2, 2023

Series of giant molecule acceptors DY, TY and QY with two, three four small acceptor subunits are synthesized by a stepwise synthetic method used for systematically investigating the influence subunit numbers on structure-property relationship from YDT to polymerized PY-IT. Among these acceptors-based devices, TY-based film shows proper donor/acceptor phase separation, higher charge transfer state yield longer lifetime. Combining highest electron mobility, more efficient exciton dissociation lower carrier recombination properties, device exhibits power conversion efficiency 16.32%. These results indicate that number in has significant their photovoltaic properties. This will be beneficial diversify structures promote applications high-efficiency stable organic solar cells.

Language: Английский

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Optimized Crystal Framework by Asymmetric Core Isomerization in Selenium‐Substituted Acceptor for Efficient Binary Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(49)

Published: Oct. 12, 2023

Both the regional isomerization and selenium-substitution of small molecular acceptors (SMAs) play significant roles in developing efficient organic solar cells (OSCs), while their synergistic effects remain elusive. Herein, we developed three isomeric SMAs (S-CSeF, A-ISeF, A-OSeF) via subtly manipulating mono-selenium substituted position (central, inner, or outer) type heteroaromatic ring on central core by strategies for OSCs, respectively. Crystallography asymmetric A-OSeF presents a closer intermolecular π-π stacking more ordered 3-dimensional network packing charge-hopping pathways. With successive out-shift position, neat films give slightly wider band gap gradually higher crystallinity electron mobility. The PM1 : afford favourable fibrous phase separation morphology with charge transportation compared to other two counterparts. Consequently, A-OSeF-based devices achieve champion efficiency 18.5 %, which represents record value reported selenium-containing binary OSCs. Our precise engineering selenium-based provides promising approach optimizing crystal boosting top-ranked SMAs-based

Language: Английский

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Simple and Efficient Synthesis of Novel Tetramers with Enhanced Glass Transition Temperature for High‐Performance and Stable Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(3)

Published: Dec. 7, 2023

Oligomer acceptors in organic solar cells (OSCs) have garnered substantial attention owing to their impressive power conversion efficiency (PCE) and long-term stability. However, the simple efficient synthesis of oligomer with higher glass transition temperatures (T

Language: Английский

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Dimeric Giant Molecule Acceptors Featuring N‐type Linker: Enhancing Intramolecular Coupling for High‐Performance Polymer Solar Cells

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(20)

Published: Feb. 21, 2024

Giant molecular acceptors (GMAs) are typically designed through the conjugated linking of individual small molecule (SMAs). This design imparts an extended size, elevating glass transition temperature (T

Language: Английский

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Recent Progress of Oligomeric Non‐Fullerene Acceptors for Efficient and Stable Organic Solar Cells

ChemSusChem, Journal Year: 2024, Volume and Issue: 17(13)

Published: Feb. 19, 2024

Organic solar cells (OSCs) have achieved remarkable power conversion efficiencies (PCEs) of over 19 % in the past few years due to rapid development non-fullerene acceptors (NFAs). However, operational stability remains a great challenge that inhibits their commercialization. Recently, oligomeric NFAs (ONFAs) attracted attention, which not only can deliver excellent device performance, but also improve thermal-/photo- OSCs. This is attributed suppressed molecular diffusion ONFAs associated with high glass-transition temperature (T

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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