End‐extended Conjugation Strategy to Reduce the Efficiency‐Stability‐Mechanical Robustness Gap in Binary All‐Polymer Solar Cells DOI
Xu Zhang, Huanhuan Gao,

Yuanyuan Kan

et al.

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

Molecular interaction induced dual fibrils towards organic solar cells with certified efficiency over 20% DOI Creative Commons
Chen Chen, Liang Wang,

Weiyi Xia

et al.

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

Published: Aug. 10, 2024

The nanoscale fibrillar morphology, featuring long-range structural order, provides abundant interfaces for efficient exciton dissociation and high-quality pathways effective charge transport, is a promising morphology high performance organic solar cells. Here, we synthesize thiophene terminated non-fullerene acceptor, L8-ThCl, to induce the fibrillization of both polymer donor host that surpasses 20% efficiency milestone After adding original weak less continuous nanofibrils donors, i.e. PM6 or D18, are well enlarged refined, whilst acceptor L8-BO also assembles into with enhanced order. By adapting layer-by-layer deposition method, order can be retained significantly boost power conversion efficiency, specific values 19.4% 20.1% PM6:L8-ThCl/L8-BO:L8-ThCl D18:L8-ThCl/L8-BO:L8-ThCl devices, latter being certified 20.0%, which highest reported so far single-junction

Language: Английский

Citations

141
Donor–acceptor mutually diluted heterojunctions for layer-by-layer fabrication of high-performance organic solar cells DOI
Liang Wang, Chen Chen,

Yiwei Fu

et al.

Nature Energy, Journal Year: 2024, Volume and Issue: 9(2), P. 208 - 218

Published: Jan. 9, 2024

Language: Английский

Citations

136
Designing A–D–A Type Fused‐Ring Electron Acceptors with a Bulky 3D Substituent at the Central Donor Core to Minimize Non‐Radiative Losses and Enhance Organic Solar Cell Efficiency DOI
Hao Lu,

Dawei Li,

Wenlong Liu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(33)

Published: May 29, 2024

Designing and synthesizing narrow band gap acceptors that exhibit high photoluminescence quantum yield (PLQY) strong crystallinity is a highly effective, yet challenging, approach to reducing non-radiative energy losses (▵E

Language: Английский

Citations

60
The Development of Quinoxaline‐Based Electron Acceptors for High Performance Organic Solar Cells DOI
Hongxing Liu, Yanfang Geng, Zuo Xiao

et al.

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

Published: June 19, 2024

In the recent advances of organic solar cells (OSCs), quinoxaline (Qx)-based nonfullerene acceptors (QxNFAs) have attracted lots attention and enabled recorded power conversion efficiency approaching 20%. As an excellent electron-withdrawing unit, Qx possesses advantages many modifiable sites, wide absorption range, low reorganization energy, so on. To develop promising QxNFAs to further enhance photovoltaic performance OSCs, it is necessary systematically summarize reported far. this review, all focused are classified into five categories as following: SM-Qx, YQx, fused-YQx, giant-YQx, polymer-Qx according molecular skeletons. The design concepts, relationships between structure optoelectronic properties, intrinsic mechanisms device discussed in detail. At end, kind materials summed up, direction prospected, challenges faced by given, constructive solutions existing problems advised. Overall, review presents unique viewpoints conquer challenge thus boost OSCs development toward commercial applications.

Language: Английский

Citations

32
Multiarmed Aromatic Ammonium Salts Boost the Efficiency and Stability of Inverted Organic Solar Cells DOI

Yufei Xin,

Huan Liu,

Xiyue Dong

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(5), P. 3363 - 3372

Published: Jan. 24, 2024

Inverted organic solar cells (OSCs) have attracted much attention because of their outstanding stability, with zinc oxide (ZnO) being commonly used as the electron transport layer (ETL). However, both surface defects and photocatalytic effect ZnO could lead to serious photodegradation acceptor materials. This, in turn, hampers improvement efficiency stability OSCs. Herein, we developed a multiarmed aromatic ammonium salt, namely, benzene-1,3,5-triyltrimethanaminium bromide (PhTMABr), for modifying ZnO. This compound possesses mild weak acidity aimed at removing residual amines present within film. In addition, PhTMABr also passivate through multiple hydrogen-bonding interactions between its terminal amino groups oxygen anion ZnO, leading better interface contact, which effectively enhances charge transport. As result, an 18.75% was achieved based on modified ETL compared bare (PCE = 17.34%). The devices utilizing retained 87% 90% initial PCE after thermal stress aging 65 °C 1500 h continuous 1-sun illumination maximum power point (MPP) tracking 1780 h, respectively. Importantly, extrapolated T

Language: Английский

Citations

31
Binary All‐polymer Solar Cells with a Perhalogenated‐Thiophene‐Based Solid Additive Surpass 18 % Efficiency DOI

Wanying Feng,

Tianqi Chen, Yulu Li

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(9)

Published: Jan. 3, 2024

Abstract Morphological control of all‐polymer blends is quintessential yet challenging in fabricating high‐performance organic solar cells. Recently, solid additives (SAs) have been approved to be capable tuning the morphology polymer: small‐molecule improving performance and stability devices. Herein, three perhalogenated thiophenes, which are 3,4‐dibromo‐2,5‐diiodothiophene (SA‐T1), 2,5‐dibromo‐3,4‐diiodothiophene (SA‐T2), 2,3‐dibromo‐4,5‐diiodothiophene (SA‐T3), were adopted as SAs optimize cells (APSCs). For blend PM6 PY‐IT, benefitting from intermolecular interactions between thiophenes polymers, molecular packing properties could finely regulated after introducing these SAs. In situ UV/Vis measurement revealed that assist morphological character evolution blend, leading their optimal morphologies. Compared as‐cast device : all SA‐treated binary devices displayed enhanced power conversion efficiencies 17.4–18.3 % with obviously elevated short‐circuit current densities fill factors. To our knowledge, PCE 18.3 for SA‐T1‐treated ranks highest among APSCs date. Meanwhile, universality SA‐T1 other demonstrated unanimously improved performance. This work provide a new pathway realizing APSCs.

Language: Английский

Citations

23
Modulation of Molecular Quadrupole Moments by Phenyl Side-Chain Fluorination for High-Voltage and High-Performance Organic Solar Cells DOI
Tingting Dai, Yuhan Meng, Zongtao Wang

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

The ground-state charge generation (GSCG) in photoactive layers determines whether the photogenerated carriers occupy deep trap energy levels, which, turn, affects device performance of organic solar cells (OSCs). In this work, charge-quadrupole electrostatic interactions are modulated to achieve GSCG through a molecular strategy introducing different numbers F atom substitutions on BTA3 side chain. results show that 8F substitution (BTA3-8F) and 16F (BTA3-16F) lead patterns highest occupied orbital (HOMO) lowest unoccupied (LUMO) level changes. perfluorination phenyl chain endows BTA3-16F with LUMO similar BTA3, ensuring high VOC. Besides, features large moment, promoting strong between neighboring molecules along π-π stacking direction, which then induces components. This efficient directly makes significant impact subsequent kinetics exciton dissociation, recombination, transport over longer time periods, as well nonradiative recombination larger spatial scales. Benefiting from favorable suitable arrangement, PTQ10/BTA3-16F achieves VOC 1.302 V PCE 11.14%, setting world record for OSCs greater than 1.3 V. addition, is an effective guest molecule improve ternary OSCs, PM6/L8-BO/BTA3-16F-based 19.82%. result emphasizes important role components OSC demonstrates modulation quadrupole moments means designing acceptors.

Language: Английский

Citations

16
Central core regulation by methoxy in quinoxaline-based non-fullerene acceptors for over 19% efficiency organic solar cells DOI
Hongbo Bi,

Dingding Qiu,

Hao Zhang

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159972 - 159972

Published: Jan. 1, 2025

Language: Английский

Citations

3
Quinoxaline-based nonfullerene acceptors with powerful core-functionalization ability enabling efficient solar energy utilization DOI
Kerui Liu, Yuanyuan Jiang,

Feng Liu

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(14), P. 4944 - 4967

Published: Jan. 1, 2024

Quinoxaline-based nonfullerene acceptors show highly tunable photoelectric properties and superior performance for sunlight utilization enabled by their powerful core-functionalization ability.

Language: Английский

Citations

17
Cyano‐Functionalized Pyrazine: A Structurally Simple and Easily Accessible Electron‐Deficient Building Block for n‐Type Organic Thermoelectric Polymers DOI

Lijun Tu,

Junwei Wang, Ziang Wu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(11)

Published: Jan. 24, 2024

Abstract Developing low‐cost and high‐performance n‐type polymer semiconductors is essential to accelerate the application of organic thermoelectrics (OTEs). To achieve this objective, it critical design strong electron‐deficient building blocks with simple structure easy synthesis, which are for development semiconductors. Herein, we synthesized two cyano‐functionalized highly blocks, namely 3,6‐dibromopyrazine‐2‐carbonitrile (CNPz) 3,6‐Dibromopyrazine‐2,5‐dicarbonitrile (DCNPz), feature structures facile synthesis. CNPz DCNPz can be obtained via only one‐step reaction three‐step reactions from cheap raw materials, respectively. Based on DCNPz, acceptor–acceptor (A–A) polymers, P(DPP‐CNPz) P(DPP‐DCNPz) successfully developed, featuring deep‐positioned lowest unoccupied molecular orbital (LUMO) energy levels, beneficial thin‐film transistors (OTFTs) OTEs performance. An optimal unipolar electron mobility 0.85 1.85 cm 2 V −1 s P(DPP‐DCNPz), When doped N ‐DMBI, show high electrical conductivities/power factors 25.3 S /41.4 μ W m K −2 , 33.9 /30.4 Hence, pyrazine represent a new class structurally simple, readily accessible block constructing

Language: Английский

Citations

16