Linkage Regulation of Back‐To‐Back Connected Dimers as Guest Acceptors Enables Organic Solar Cells with Excellent Efficiency, Stability and Flexibility DOI

Shiyong You,

Youhui Zhang, Bin Huang

et al.

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

Published: Sept. 18, 2024

Abstract High efficiency, stability, and flexibility are key prerequisites for the commercial applications of organic solar cells (OSCs). Herein, three back‐to‐back connected dimers (2Qx‐TT, 2Qx‐C3, 2Qx‐C6) developed as guest acceptors OSCs with improved comprehensive performance. By regulating linkage from rigid bithiophene to flexible alkyl chain, display quite different molecular geometry intermolecular interactions, consequently influencing their packing arrangement, film‐forming process, carrier mobilities, device flexibility. introducing these dimer into active layer, form alloy phases host acceptor, promoting process charge dynamics. All ternary devices exhibit PCEs over 18% than control binary device. Among them, 2Qx‐C3‐based obtains best efficiency high 19.03%. Moreover, thanks stronger entanglement favored by linkage, PM6:BTP‐eC9:2Qx‐C3‐based shows outstanding stability The displays an PCE 16.09% a crack‐onset strain 15.0%, showing excellent mechanical robustness close all‐polymer devices. This work demonstrates potential highly efficient, stable OSCs.

Language: Английский

A dendritic hexamer acceptor enables 19.4% efficiency with exceptional stability in organic solar cells DOI Creative Commons
Tao Jia, Tao Lin, Yang Yang

et al.

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

Published: Jan. 20, 2025

Language: Английский

Citations

3
Synchronous Regulation of Donor and Acceptor Microstructure using Thiophene‐Derived Non‐Halogenated Solvent Additives for Efficient and Stable Organic Solar Cells DOI
Zhou Zhang, Qiaomei Chen, Cuifen Zhang

et al.

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

Published: March 29, 2024

Abstract Solvent additives are pivotal for enhancing the morphology, efficiency, and stability of organic solar cells (OSCs). However, widely used additive, 1,8‐diiodooctane (DIO), has drawbacks like harmful halogen content potential OSC degradation. To address these issues, novel non‐halogenated, thienyl‐alkyl‐thienyl structural solvent additives—DTP, DTH, DTN—featuring varying alkyl linker lengths (CH 2 ) 3 , 6 9 respectively introduced. Additives with longer linkers, DTH DTN, effectively dissolve strongly interact both donor polymer PM6 acceptor L8‐BO. This dual interaction enables precise tuning their microstructures, resulting in enhanced crystallinity. Upon incorporating as an additive OSCs (PM6:L8‐BO), a minimal voltage loss is observed, leading to impressive efficiency 18.51%, surpassing 17.90% achieved DIO. Furthermore, DTH‐based devices demonstrated superior photostability. In ternary blend system (PM6:D18‐Cl:L8‐BO), 19.07% attained, outperforming previous non‐halogenated additive‐based OSCs. employing processing combination toluene carbon disulfide, high PCE 18.82% achieved. These results underscore efficacy designing aromatic units, enabling tailored interactions acceptor, thereby presenting robust strategy optimizing performance stability.

Language: Английский

Citations

15
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

14
Efficient and Photostable Organic Solar Cells Achieved by Alloyed Dimer Acceptors with Tailored Linker Structures DOI Creative Commons
Jin‐Woo Lee,

Cheng Sun,

Hyesu Jeon

et al.

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

Citations

12
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
Layered All‐Polymer Solar Cells with Efficiency of 18.34% by Employing Alloyed Polymer Donors DOI Open Access
Hang Zhou, Lu Zhang,

Hongyue Tian

et al.

Small, Journal Year: 2025, Volume and Issue: 21(11)

Published: Feb. 7, 2025

Abstract A series of layered all‐polymer solar cells (LA‐PSCs) with the normal or inverted structure are prepared by employing a sequential spin‐coating method PBQx‐TCl, PM1 as polymer donor, and PY‐DT acceptor. The power conversion efficiency (PCE) LA‐PSCs can be improved from 17.20% to 18.34% incorporating 30 wt.% into PBQx‐TCl layer, resulting simultaneously increased J SC 25.35 mA cm −2 , V OC 0.971 FF 74.49%. PCE improvement also achieved PBQx‐TCl:PM1 donor layers. mixed prefer form alloyed states in LA‐PSCs, which confirmed gradually s more content Meanwhile, photogenerated excitons layers dissociated at interface between PM1, especially for located near ITO electrode. exciton dissociation provide an additional channel improving utilization efficiency, positive external quantum spectral difference (∆EQE) values Over 6.6% realized using layer.

Language: Английский

Citations

2
Molecular Design of Dimeric Acceptor Enables Binary Organic Solar Cells with 19.78% Efficiency and Enhanced Stability DOI Open Access
Yafei Ding,

Waqar Ali Memon,

Shilong Xiong

et al.

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

Published: March 3, 2025

Abstract The development of organic solar cells (OSCs) with high efficiency and stability is highly desirable to facilitate its commercial applications. Although dimeric acceptors distinctive advantages have been widely studied, high‐performance binary OSCs based on such molecules rarely achieved. In this work, a new acceptor (DY‐FL) constructed by simultaneously optimizing the linking sites units, as well building blocks. Thanks effective molecular design, DY‐FL provides improved stacking for fibrous morphology favorable exciton/charge dynamics. Consequently, DY‐FL‐based render superior power conversion (PCE) 19.78%, representing record‐breaking acceptors. Importantly, devices display significantly enhanced operational under external stimuli light heat, in comparison their small molecule (Y‐F)‐based counterpart. These findings highlight significance blocks modes, providing insight into design strategy state‐of‐the‐art OSCs.

Language: Английский

Citations

1
Non‐Fully Conjugated Photovoltaic Materials with Y‐Series Acceptor Backbone for High‐Performance Organic Solar Cells† DOI

Hairui Bai,

Qunping Fan, Ruijie Ma

et al.

Chinese Journal of Chemistry, Journal Year: 2024, Volume and Issue: 42(11), P. 1307 - 1318

Published: March 13, 2024

Comprehensive Summary In the last few years, organic solar cells (OSCs) have made significant progress in photovoltaic performance, mainly due to innovative development of active layer materials, especially Y‐series and related derivatives as acceptors which become key factor that boosts power conversion efficiency. Recently, achieve high‐performance OSCs, an emerging molecular design strategy applying flexible alkyl units linkers construct non‐fully conjugated has been developed addressed great attention. This review highlights materials with backbone enable OSCs. Impressive OSCs achieved by some representative material systems. The strategies are discussed detail. Finally, a brief summary future prospect provided advancing towards brighter future. Key Scientists

Language: Английский

Citations

9
Impact of Linker Engineering in Core‐Linked Dimeric Acceptors for High‐Performance Organic Solar Cells DOI Creative Commons

Shinbee Oh,

Da-Hyun Jeong,

Kihyun Bae

et al.

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

Citations

8
An in situ crosslinked matrix enables efficient and mechanically robust organic solar cells with frozen nano-morphology and superior deformability DOI
Wei Song, Zhenyu Chen,

Congqi Lin

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(19), P. 7318 - 7329

Published: Jan. 1, 2024

An in-situ cross-linkable monomer is carefully developed into blend films to finely manipulate the molecular packing, crystallization and nanomorphology during film formation. As a result, stabilized PCEs of 19.84% for rigid device 18.32% flexible organic solar cells are achieved.

Language: Английский

Citations

8