Molecular Control of the Donor/Acceptor Interface Suppresses Charge Recombination Enabling High‐Efficiency Single‐Component Organic Solar Cells DOI Creative Commons
Yao Li, Richard A. Pacalaj, Yongmin Luo

et al.

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

Published: Aug. 28, 2024

Abstract Single‐component organic solar cells based on double cable polymers have achieved remarkable performance, with DCPY2 reaching a high efficiency of over 13%. In this study, is further optimized an 13.85%, maintaining fill factor (FF) without compromising the short circuit current. Despite its intermixed morphology, shows reduced recombination rate compared to their binary counterpart (PBDB‐T:Y‐O6). This slower in attributed wavefunction overlap delocalized charges, by spatially separating donor and acceptor units alkyl linker, thereby restricting pathways. Adding 1,8‐diiodooctane (DIO) into facilitating aggregation, allowing free charges become more delocalized. The DIO‐assisted aggregation (5% DIO) evidenced increased pseudo‐pure domain size Y‐O6. Fine molecular control at donor/acceptor interface double‐cable polymer achieves non‐geminate under efficient charge generation, mobility, carrier lifetime, achieving superior performance. Nevertheless, FF still limited relatively low mobility blend, suggesting potential for improvement through enhanced higher‐dimensional packing material.

Language: Английский

Stability of organic solar cells: toward commercial applications DOI
Pengfei Ding, Daobin Yang,

Shuncheng Yang

et al.

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

Citations

123
Dimer Acceptor Adopting a Flexible Linker for Efficient and Durable Organic Solar Cells DOI
Qi Feng, Yanxun Li, Rui Zhang

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(21)

Published: March 22, 2023

Abstract Organic solar cells (OSCs) have advanced rapidly due to the development of new photovoltaic materials. However, long‐term stability OSCs still poses a severe challenge for their commercial deployment. To address this issue, dimer acceptor ( d T9TBO) with flexible linker is developed incorporation into small‐molecule acceptors form molecular alloy enhanced intermolecular packing and suppressed diffusion stabilize active layer morphology. Consequently, PM6 : Y6 T9TBO‐based device displays an improved power conversion efficiency (PCE) 18.41 % excellent thermal negligible decay after being aged at 65 °C 1800 h. Moreover, OSC also exhibits mechanical durability, maintaining 95 its initial PCE bended repetitively 1500 cycles. This work provides simple effective way fine‐tune stabilized morphology overcome trade‐off between stability.

Language: Английский

Citations

85
A Pyrene‐Fused Dimerized Acceptor for Ternary Organic Solar Cells with 19% Efficiency and High Thermal Stability DOI

Xucong Liu,

Zhou Zhang, Chao Wang

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(1)

Published: Nov. 21, 2023

A pyrene-fused dimerized electron acceptor has been successfully synthesized and subsequently incorporated as the third component in ternary organic solar cells (OSCs). Diverging from traditional acceptors with a linear configuration, this novel displays distinctive "butterfly-like" structure, comprising two Y-acceptors wings fused pyrene-based backbone. The extended π-conjugated backbone electron-donating nature of pyrene enable new to show low solubility, elevated glass transition temperature (Tg ), low-lying frontier energy levels. Consequently, seamlessly integrates into OSCs, enhancing transporting properties, reducing non-radiative voltage loss, elevating open-circuit voltage. These merits have enabled OSCs an exceptional efficiency 19.07%, marked improvement compared 17.6% attained binary OSCs. More importantly, high Tg exhibited by helps stabilize morphology photoactive layer thermal-treated at 70 °C, retaining 88.7% over 600 hours. For comparison, experience decline 73.7% after same duration. results indicate that design incorporation unit is promising strategy development for

Language: Английский

Citations

60
Powering the Future: A Critical Review of Research Progress in Enhancing Stability of High‐Efficiency Organic Solar Cells DOI Open Access

Maoheng Wu,

Bing Ma, Sunsun Li

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(50)

Published: Aug. 21, 2023

Abstract Organic solar cells (OSCs) are a promising photovoltaic technology that employs organic semiconductor material as the photoactive layer, which has unique advantages of light weight, large‐area flexible fabrication, low‐cost, and semitransparent. In recent years, performance OSCs been significantly improved, highest power conversion efficiency exceeded 19%. Despite tremendous progress in OSCs, major bottleneck realizing commercialization is device stability. Therefore, reviewing research on stability high‐performance urgent necessary. This review discusses factors limiting lifetime, such metastable morphology, air, irradiation, heat, mechanical stresses. Additionally, this presents over last 5 focusing enhancing from perspective layers other functional layers, includes design engineering, solid additives, optimizing buffer using stable electrodes, encapsulation. Lastly, explores current challenges prospects, including advanced machine learning techniques to assist experimental research.

Language: Английский

Citations

45
Approaching 20% Efficiency in Ortho‐Xylene Processed Organic Solar Cells by a Benzo[a]phenazine‐Core‐Based 3D Network Acceptor with Large Electronic Coupling and Long Exciton Diffusion Length DOI
Zhenghui Luo,

Weifei Wei,

Ruijie Ma

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(41)

Published: Aug. 13, 2024

Abstract High‐performance organic solar cells often rely on halogen‐containing solvents, which restrict the photovoltaic industry. Therefore, it is imperative to develop efficient materials compatible with halogen‐free solvents. Herein, a series of benzo[ ]phenazine (BP)‐core‐based small‐molecule acceptors (SMAs) achieved through an isomerization chlorination strategy presented, comprising unchlorinated NA1, 10‐chlorine substituted NA2, 8‐chlorine NA3, and 7‐chlorine NA4. Theoretical simulations highlight NA3's superior orbit overlap length tight molecular packing, attributed interactions between end group BP unit. Furthermore, NA3 demonstrates dense 3D network structures record electronic coupling 104.5 meV. These characteristics empower ortho‐xylene ( o ‐XY) processed PM6:NA3 device power conversion efficiency (PCE) 18.94%, surpassing PM6:NA1 (15.34%), PM6:NA2 (7.18%), PM6:NA4 (16.02%). Notably, significantly lower PCE in excessive self‐aggregation NA2 ‐XY. Importantly, incorporation D18‐Cl into binary blend enhances crystallographic ordering increases exciton diffusion donor phase, resulting ternary 19.75% (certified as 19.39%). findings underscore significance incorporating new electron‐deficient units design SMAs tailored for environmentally benign solvent processing OSCs.

Language: Английский

Citations

32
Three‐in‐One Strategy Enables Single‐Component Organic Solar Cells with Record Efficiency and High Stability DOI
Yujun Cheng, Bin Huang,

Qilong Mao

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(19)

Published: Feb. 7, 2024

Abstract Single‐component organic solar cells (SCOSCs) with covalently bonding donor and acceptor are becoming increasingly attractive because of their superior stability over traditional multicomponent blend (OSCs). Nevertheless, the efficiency SCOSCs is far behind state‐of‐the‐art OSCs. Herein, by combination advantages three‐component single‐component devices, this work reports an innovative three‐in‐one strategy to boost performance SCOSCs. In strategy, three independent components (PM6, D18, PYIT) linked together create a new active layer based on ternary conjugated block copolymer (TCBC) PM6‐D18 ‐b‐ PYIT facile polymerization. Precisely manipulating component ratios in polymer chains able broaden light utilization, promote charge dynamics, optimize, stabilize film morphology, contributing simultaneously enhanced Ultimately, PYIT‐based device exhibits power conversion (PCE) 14.89%, which highest reported Thanks aggregation restriction each chain entanglement system, SCOSC displays significantly higher than corresponding two‐component (PM6‐D18:PYIT) (PM6:D18:PYIT). These results demonstrate that promising for developing stability.

Language: Английский

Citations

21
Improving the Stability of Organic Solar Cells: From Materials to Devices DOI Open Access
Yanxun Li, Kai‐Kai Liu, Francis Lin

et al.

Solar RRL, Journal Year: 2023, Volume and Issue: 7(20)

Published: Aug. 24, 2023

Organic solar cells (OSCs) are a promising emerging photovoltaic technology for energy conversion. Recently, the power conversion efficiencies of OSCs have been improved to get closer their Schottky–Queisser limit. However, operational stability remains as major challenge ahead deployment practical applications. The main causes OSC instability stem from poor intrinsic materials, metastable morphology multicomponent active layer, unstable interfaces, and sensitivity moisture oxygen. To address these issues, it is necessary comprehensive in‐depth understanding fundamentals develop an integrated solution overcome them. Herein, state‐of‐art strategies used improve aspects material design, device processing, encapsulation techniques, in hope delivering rational solutions, summarized. In end, prospects toward future development efficient stable provided.

Language: Английский

Citations

37
Precise Methylation Yields Acceptor with Hydrogen‐Bonding Network for High‐Efficiency and Thermally Stable Polymer Solar Cells DOI

Weifei Wei,

Cai’e Zhang, Zhanxiang Chen

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(6)

Published: Dec. 15, 2023

Abstract Utilizing intermolecular hydrogen‐bonding interactions stands for an effective approach in advancing the efficiency and stability of small‐molecule acceptors (SMAs) polymer solar cells. Herein, we synthesized three SMAs (Qo1, Qo2, Qo3) using indeno[1,2‐ b ]quinoxalin‐11‐one (Qox) as electron‐deficient group, with incorporation a methylation strategy. Through crystallographic analysis, it is observed that two Qox‐based methylated (Qo2 exhibit multiple hydrogen bond‐assisted 3D network transport structures, contrast to 2D structure gem‐dichlorinated counterpart (Qo4). Notably, Qo2 exhibits stronger compared Qo3. Consequently, PM6 : device realizes highest power conversion (PCE) 18.4 %, surpassing efficiencies devices based on Qo1 (15.8 %), Qo3 (16.7 Qo4 (2.4 %). This remarkable PCE can be primarily ascribed enhanced donor‐acceptor miscibility, more favorable medium structure, efficient charge transfer collection behavior. Moreover, demonstrates exceptional thermal stability, retaining 82.8 % its initial after undergoing annealing at 65 °C 250 hours. Our research showcases precise methylation, particularly targeting formation tune crystal packing patterns, represents promising strategy molecular design stable SMAs.

Language: Английский

Citations

37
Recent Advances of Benzodithiophene‐Based Donor Materials for Organic Solar Cells DOI Open Access
Dan Zhou, Yanyan Wang, Shu Yang

et al.

Small, Journal Year: 2023, Volume and Issue: 20(8)

Published: Oct. 12, 2023

Recently, the power conversion efficiency (PCE) of organic solar cells (OSCs) has increased dramatically, making a big step toward industrial application OSCs. Among numerous OSCs, benzodithiophene (BDT)-based OSCs stand out in achieving efficient PCE. Notably, single-junction using BDT-based polymers as donor materials have completed PCE over 19%, indicating dramatic potential for preparing high-performance large-scale This paper reviews recent progress based on BDT polymer (PDMs). The development is concisely summarized. Meanwhile, relationship between structure PDMs and performance further described this review. Besides, prospect single junction are also discussed.

Language: Английский

Citations

27
High‐Performance Ternary Organic Solar Cells with Enhanced Luminescence Efficiency and Miscibility Enabled by Two Compatible Acceptors DOI
Cai’e Zhang, Rui Zheng, Hao Huang

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(12)

Published: Jan. 28, 2024

Abstract The ternary strategy has proven to be an effective method for improving the efficiency of organic solar cells (OSCs). However, designing and selecting third component still pose challenges. In this study, issue is addressed by focusing on PBDB‐T:Y18‐F binary system introducing a new, strong luminescent, asymmetric small‐molecule acceptor (SMA) called L8‐CBIC‐Cl, which shares similar skeleton with Y18‐F. similarity in molecular framework facilitates good compatibility between two acceptors, resulting formation alloy‐like phase. Furthermore, norbornenyl‐modified end group L8‐CBIC‐Cl contributes its luminescent properties, turn leads low non‐radiative energy loss high open‐circuit voltage. Consequently, PBDB‐T:L8‐CBIC‐Cl:Y18‐F based devices realize power conversion (PCE) up 17.01%, higher than device (14.49%). Importantly, exhibits universality as guest other three systems (D18:Y6, D18:BTP‐eC9‐4F, D18:L8‐BO). D18:L8‐BO:L8‐CBIC‐Cl shows impressive 19%. work demonstrates that employing SMA PLQY better miscibility host great potential developing high‐efficiency OSCs.

Language: Английский

Citations

17