Polymer-like tetramer acceptor enables stable and 19.75% efficiency binary organic solar cells DOI Creative Commons
Jianxiao Wang, Cheng Sun, Yonghai Li

et al.

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

Published: Feb. 20, 2025

Abstract Limited by large batch differences and inferior polymerization degree of current polymer acceptors, the potential high efficiency stability advantages all-polymer solar cells (all-PSCs) cannot be fully utilized. Alternatively, largely π-extended structurally definite oligomer acceptors are effective strategies to realize overall performance acceptors. Herein, we report a linear tetramer acceptor namely 4Y-BO with identical molecular skeleton comparable molecular-weight relative control PY-BO. The shows refined film-forming kinetics improved ordering, offering uniform crystallinity donor hence well-defined fibrous heterojunction textures. Encouragingly, PM6:4Y-BO devices achieve an up 19.75% (certified efficiency:19.58%), surpassing that PM6:PY-BO device (15.66%) ranks highest among based on More noticeably, thermal stability, photostability mechanical flexibility collectively enhanced for devices. Our study provides important approach fabricating stable organic photovoltaics.

Language: Английский

Rhodanine Substitution of Asymmetric Nonfullerene Acceptors for High-Performance Organic Solar Cells DOI
Qingbin Li, Yang Bai, Shuai Jiang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Asymmetric substitution is acknowledged as a straightforward yet potent approach for the optimization of small molecule acceptors (SMAs), thereby enhancing power conversion efficiency (PCE) organic solar cells (OSCs). In this work, we have successfully engineered and synthesized novel asymmetric SMA, designated Y6-R, which features rhodanine-terminated inner side-chain. devices with PM6 polymer donor, Y6-R demonstrated an impressive PCE 18.62% open-circuit voltage (Voc) 0.863 V, short-circuit current (Jsc) 27.89 mA cm-2, fill factor (FF) 77.35%, much higher than that symmetric SMA Y6-based (16.84%). The superior performance PM6:Y6-R can be attributed to combination factors, including upshifted LUMO energy levels, more desired exciton dissociation, collection, extraction capability, well reduced recombination suppressed Eloss. addition, molecules promote coaggregation behaviors along endowing stronger ordered crystallinity blend films. Our findings underscore effectiveness rhodanine-substitution, representative "A" units, SMAs in fine-tuning behavior efficiency.

Language: Английский

Citations

2
Optimized Crystal Framework by Asymmetric Core Isomerization in Selenium‐Substituted Acceptor for Efficient Binary Organic Solar Cells DOI
Can Yang, Qiaoshi An,

Mengyun Jiang

et al.

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

Citations

35
Tethered Small‐Molecule Acceptor Refines Hierarchical Morphology in Ternary Polymer Solar Cells: Enhanced Stability and 19% Efficiency DOI
Ming Zhang, Bowen Chang, Rui Zhang

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(7)

Published: Oct. 10, 2023

Abstract Polymer solar cells (PSCs) are promising for efficient energy conversion, but achieving high efficiency and device longevity within a bulk‐heterojunction (BHJ) structure remains challenge. Traditional small‐molecule acceptors (SMAs) in the BHJ blend show thermodynamic instability affecting morphology. In contrast, tethered SMAs exhibit higher glass transition temperatures, mitigating these concerns. Yet, they might not integrate well with polymer donors, causing pronounced phase separation overpurification of mixed domains. Herein, novel ternary is introduced that uses DY‐P2EH , dimeric SMA conjugated side‐chains as host acceptor, BTP‐ec9, monomeric secondary which respectively possess hypomiscibility hypermiscibility donor PM6. This unique combination affords parallel‐connected blend, leading to hierarchical stable The achieves remarkable fill factor 80.61% an impressive power conversion 19.09%. Furthermore, exhibits exceptional stability, retaining over 85% its initial even after enduring 1100 h thermal stress at 85 °C. These findings highlight potential advantage design devices refined more durable technologies.

Language: Английский

Citations

34
Simple and Efficient Synthesis of Novel Tetramers with Enhanced Glass Transition Temperature for High‐Performance and Stable Organic Solar Cells DOI
Chen Zhang,

Jiali Song,

Linglong Ye

et al.

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

Citations

30
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

15
Dimeric Giant Molecule Acceptors Featuring N‐type Linker: Enhancing Intramolecular Coupling for High‐Performance Polymer Solar Cells DOI

Hongyuan Fu,

Qingyuan Wang, Qi Chen

et al.

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

Citations

13
Improving Miscibility of Polymer Donor and Polymer Acceptor by Reducing Chain Entanglement for Realizing 18.64 % Efficiency All Polymer Solar Cells DOI
Min Deng, Xiaopeng Xu,

Wuke Qiu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(35)

Published: June 11, 2024

All-polymer solar cells have experienced rapid development in recent years by the emergence of polymerized small molecular acceptors (PSMAs). However, strong chain entanglements polymer donors (PDs) and (PAs) decrease miscibility resulting mixtures, making it challenging to optimize blend morphology. Herein, we designed three PAs, namely PBTPICm-BDD, PBTPICγ-BDD PBTPICF-BDD, smartly using a BDD unit as copolymerize with different Y-typed non-fullerene (NF-SMAs), thus achieving certain degree distortion giving system enough internal space reduce chains. Such effects increase chances PD being interspersed into acceptor material, which improve solubility between PA. The PBTPICF-BDD displayed better PBQx-TCl, leading well optimized As result, high power conversion efficiencies (PCEs) 17.50 % 17.17 were achieved for PBQx-TCl : devices, respectively. With addition PYFT-o third component further extend absorption spectral coverage finely tune microstructures morphology, remarkable PCE 18.64 was realized finally.

Language: Английский

Citations

13
Halogenated Dibenzo[f,h]quinoxaline Units Constructed 2D‐Conjugated Guest Acceptors for 19% Efficiency Organic Solar Cells DOI Creative Commons

Jingshun Gao,

Hairui Bai,

Ping Li

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(31)

Published: June 17, 2024

Abstract Halogenation of Y‐series small‐molecule acceptors (Y‐SMAs) is identified as an effective strategy to optimize photoelectric properties for achieving improved power‐conversion‐efficiencies (PCEs) in binary organic solar cells (OSCs). However, the effect different halogenation 2D‐structured large π‐fused core guest Y‐SMAs on ternary OSCs has not yet been systematically studied. Herein, four 2D‐conjugated (X‐QTP‐4F, including halogen‐free H‐QTP‐4F, chlorinated Cl‐QTP‐4F, brominated Br‐QTP‐4F, and iodinated I‐QTP‐4F) by attaching halogens into 2D‐conjugation extended dibenzo[ f , h ]quinoxaline are developed. Among these X‐QTP‐4F, Cl‐QTP‐4F a higher absorption coefficient, optimized molecular crystallinity packing, suitable cascade energy levels, complementary with PM6:L8‐BO host. Moreover, among PM6:L8‐BO:X‐QTP‐4F blends, PM6:L8‐BO:Cl‐QTP‐4F obtains more uniform size‐suitable fibrillary network morphology, well vertical phase distribution, thus boosting charge generation, transport, extraction, suppressing loss OSCs. Consequently, PM6:L8‐BO:Cl‐QTP‐4F‐based achieve 19.0% efficiency, which state‐of‐the‐art based superior devices host (17.70%) guests H‐QTP‐4F (18.23%), Br‐QTP‐4F (18.39%), I‐QTP‐4F (17.62%). The work indicates that promising gain efficient

Language: Английский

Citations

13
Rational design of flexible-linked 3D dimeric acceptors for stable organic solar cells demonstrating 19.2% efficiency DOI
Zhe Zhang, Shaohui Yuan, Tianqi Chen

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(15), P. 5719 - 5729

Published: Jan. 1, 2024

Efficient 3D dimeric acceptors linking two monomers with flexible alkyl linkers were developed. The resulting CH8-6-based OSCs achieved a high PCE of 19.2% and also exhibited excellent thermal stability mechanical flexibility.

Language: Английский

Citations

12
Multi‐Selenophene Strategy Enables Dimeric Acceptors‐Based Organic Solar Cells with over 18.5% Efficiency DOI
Yuyang Bai, Tianqi Chen, Xinyi Ji

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(30)

Published: May 9, 2024

Abstract Dimeric acceptor (DMA) becomes a promising alternative to small‐molecular and polymeric acceptor‐based organic solar cells (OSCs) due its well‐defined chemical structure, high batch‐to‐batch reproducibility, low molecular diffusion properties. However, DMAs usually exhibit blueshifted absorptions, limiting their photon utilization abilities. Herein, multi‐selenophene strategies are adopted develop redshifted DMAs. From monomer (YSe) dimers (DYSe‐1 DYSe‐2), reduced electron reorganization energies exciton binding enable the efficient charge dynamics in DMAs‐based OSCs. Together with effective absorption extending ≈920 nm, DYSe‐1‐ DYSe‐2‐ based OSCs outstanding short‐circuit current densities ( J SC s) over 27 mA cm −2 , which best among Besides, compared YSe‐based device, both DMA‐based devices have higher electroluminescence quantum efficiencies thus reduce nonradiative recombination loss (ΔE 3 ), contributing energy losses. The resultant open‐circuit voltages V OC of ≈0.88 V, which, combining super values, lead power conversion 18.56% 18.22%, respectively. These results highlight great potential strategy for development performance.

Language: Английский

Citations

11