Stability of organic solar cells: toward commercial applications

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(5), P. 2350 - 2387

Published: Jan. 1, 2024

Organic solar cells (OSCs) have attracted a great deal of attention in the field clean energy due to their advantages transparency, flexibility, low cost and light weight. Introducing them market enables seamless integration into buildings windows, while also supporting wearable, portable electronics internet-of-things (IoT) devices. With development photovoltaic materials optimization fabrication technology, power conversion efficiencies (PCEs) OSCs rapidly improved now exceed 20%. However, there is significant lack focus on material stability device lifetime, causing severe hindrance commercial applications. In this review, we carefully review important strategies employed improve over past three years from perspectives design engineering. Furthermore, analyze discuss current progress terms air, light, thermal mechanical stability. Finally, propose future research directions overcome challenges achieving highly stable OSCs. We expect that will contribute solving problem OSCs, eventually paving way for applications near future.

Language: Английский

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Unique assembly of giant star-shaped trimer enables non-halogen solvent-fabricated, thermal stable, and efficient organic solar cells

Joule, Journal Year: 2023, Volume and Issue: 7(10), P. 2386 - 2401

Published: Sept. 20, 2023

Language: Английский

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Unidirectional Sidechain Engineering to Construct Dual‐Asymmetric Acceptors for 19.23 % Efficiency Organic Solar Cells with Low Energy Loss and Efficient Charge Transfer

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(36)

Published: July 18, 2023

Achieving both high open-circuit voltage (Voc ) and short-circuit current density (Jsc to boost power-conversion efficiency (PCE) is a major challenge for organic solar cells (OSCs), wherein energy loss (Eloss inefficient charge transfer usually take place. Here, three new Y-series acceptors of mono-asymmetric asy-YC11 dual-asymmetric bi-asy-YC9 bi-asy-YC12 are developed. They share the same asymmetric D1 AD2 (D1 =thieno[3,2-b]thiophene D2 =selenopheno[3,2-b]thiophene) fused-core but have different unidirectional sidechain on side, allowing fine-tuned molecular properties, such as intermolecular interaction, packing pattern, crystallinity. Among binary blends, PM6 : one has better morphology with appropriate phase separation higher order than asy-YC9 bi-asy-YC11 ones. Therefore, bi-asy-YC12-based OSCs offer PCE 17.16 % Voc Jsc , due reduced Eloss efficient properties. Inspired by strong NIR-absorption, introduced into L8-BO construct ternary OSCs. Thanks broadened absorption, optimized morphology, furtherly minimized achieve champion 19.23 %, which highest efficiencies among these annealing-free devices. Our developed engineering constructing bi-asymmetric provides an approach

Language: Английский

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Physical insights into non-fullerene organic photovoltaics

Nature Reviews Physics, Journal Year: 2024, Volume and Issue: 6(6), P. 365 - 381

Published: April 15, 2024

Language: Английский

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Efficient all-small-molecule organic solar cells processed with non-halogen solvent

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

Published: March 2, 2024

Abstract All-small-molecule organic solar cells with good batch-to-batch reproducibility combined non-halogen solvent processing show great potential for commercialization. However, of all-small-molecule are rarely reported and its power conversion efficiencies very difficult to improve. Herein, we designed synthesized a small molecule donor BM-ClEH that can take advantage strong aggregation property induced by intramolecular chlorine-sulfur non-covalent interaction improve molecular pre-aggregation in tetrahydrofuran corresponding micromorphology after film formation. Tetrahydrofuran-fabricated based on BM-ClEH:BO-4Cl achieved high 15.0% binary device 16.1% ternary under thermal annealing treatment. In contrast, weakly aggregated BM-HEH without bond is almost inefficient same conditions due poor disordered π-π stacking, indistinct phase separation exciton dissociation. This work promotes the development provides further guidance.

Language: Английский

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Isomerization Engineering of Solid Additives Enables Highly Efficient Organic Solar Cells via Manipulating Molecular Stacking and Aggregation of Active Layer

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(33)

Published: June 20, 2024

Morphology control is crucial in achieving high-performance organic solar cells (OSCs) and remains a major challenge the field of OSC. Solid additive an effective strategy to fine-tune morphology, however, mechanism underlying isomeric solid additives on blend morphology OSC performance still vague urgently requires further investigation. Herein, two based pyridazine or pyrimidine as core units, M1 M2, are designed synthesized explore working OSCs. The smaller steric hindrance larger dipole moment facilitate better π-π stacking aggregation M1-based active layer. M1-treated all-small-molecule OSCs (ASM OSCs) obtain impressive efficiency 17.57%, ranking among highest values for binary ASM OSCs, with 16.70% M2-treated counterparts. Moreover, it imperative investigate whether isomerization engineering works state-of-the-art polymer D18-Cl:PM6:L8-BO-based devices achieve exceptional 19.70% (certified 19.34%), work provides deep insights into design clarifies potential optimizing device through additives.

Language: Английский

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20.6% Efficiency Organic Solar Cells Enabled by Incorporating a Lower Bandgap Guest Nonfullerene Acceptor Without Open‐Circuit Voltage Loss

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

Abstract Simultaneously mitigating both photovoltage and photocurrent losses is crucial for organic solar cells (OSCs) to approach the Shockley–Queisser limit of ideal efficiency. Incorporating a narrower bandgap nonfullerene acceptor (NFA) as guest component into host donor:NFA system broadens absorption spectrum. However, this can also increase nonradiative decay rate according energy‐gap law. In work, ternary OSCs are constructed by combining narrow AQx‐2F (as NFA) with lower eC9 NFA), significantly enhancing generation without compromising photovoltage. The addition acts crystallization inducer, extending period increasing ordered packing distance. This leads suppressed trap states, elevated dielectric constant, prolonged exciton lifetime, balanced hole/electron transport, reduced recombination loss. Consequently, optimized D18:AQx‐2F:eC9 achieve champion power conversion efficiency (PCE) 20.6% high open‐circuit voltage 0.937 V, short‐circuit current density 27.2 mA cm −2 fill factor 80.8%, validated an independently certified PCE 20.0%, establishing new benchmark bulk heterojunction OSCs. work demonstrates effective method simultaneously mitigate losses, paving way high‐performance

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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All-small-molecule organic solar cells with 18.1% efficiency and enhanced stability enabled by improving light harvesting and nanoscale microstructure

Joule, Journal Year: 2023, Volume and Issue: 7(12), P. 2845 - 2858

Published: Oct. 31, 2023

Language: Английский

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Optimization of Charge Management and Energy Loss in All‐Small‐Molecule Organic Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(22)

Published: July 3, 2023

All-small-molecule organic solar cells (ASM-OSCs) have received tremendous attention in recent decades because of their advantages over polymer counterparts. These include well-defined chemical structures, easy purification, and negligible batch-to-batch variation. Remarkable progress with a power conversion efficiency (PCE) 17% has recently been achieved improved charge management (FF × J

Language: Английский

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